MF1190-01
CMOS 4-BIT SINGLE CHIP MICROCOMPUTER
E0C6011 T ECHNICAL M ANUAL
E0C6011 Technical Hardware
NOTICE
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Seiko Epson does not assume any liability of any kind arising out of any inaccuracies contained in this material or due to its application or use in any product or circuit and, further, there is no representation that this material is applicable to products requiring high level reliability, such as medical products. Moreover, no license to any intellectual property rights is granted by implication or otherwise, and there is no representation or warranty that anything made in accordance with this material will be free from any patent or copyright infringement of a third
CONTENTS
C
ONTENTSCHAPTER
1 I
NTRODUCTION____________________________________________ 1
1.1 Features ... 1
1.2 Block Diagram ... 2
1.3 Pin Layout ... 3
1.4 Pin Description ... 4
CHAPTER
2 P
OWERS
UPPLYANDI
NITIALR
ESET____________________________ 5 2.1 Power Supply ... 5
2.2 Initial Reset ... 6
2.2.1 Power-on reset circuit ... 6
2.2.2 Reset terminal (RESET) ... 6
2.2.3 Internal register following initialization ... 7
2.3 Test Terminal (TEST) ... 7
CHAPTER
3 CPU, ROM, RAM ________________________________________ 8 3.1 CPU ... 8
3.2 ROM ... 8
3.3 RAM ... 8
CHAPTER
4 P
ERIPHERALC
IRCUITSANDO
PERATION__________________________ 9 4.1 Memory Map ... 9
4.2 Oscillation Circuit ... 11
4.2.1 CR oscillation circuit ... 11
4.2.2 Mask option ... 11
4.2.3 I/O memory for peripheral system clock ... 12
4.3 Input Ports (K00–K03) ... 13
4.3.1 Configuration of input port ... 13
4.3.2 Interrupt function ... 13
4.3.3 Mask option ... 14
4.3.4 I/O memory of input port ... 15
4.3.5 Programming note ... 15
4.4 Output Ports (R00–R03) ... 16
4.4.1 Configuration of output port ... 16
4.4.2 Mask option ... 16
4.4.3 I/O memory of output port ... 18
4.4.4 Programming note ... 19
4.5 I/O Ports (P00–P03, P10–P13) ... 20
4.5.1 Configuration of I/O port ... 20
4.5.2 I/O control register and I/O mode ... 20
4.5.3 Mask option ... 20
4.5.4 I/O memory of I/O port ... 21
CONTENTS
4.7 Clock Timer ... 32
4.7.1 Configuration of clock timer ... 32
4.7.2 Interrupt function ... 32
4.7.3 I/O memory of clock timer ... 33
4.7.4 Programming notes ... 34
4.8 Interrupt and HALT/SLEEP ... 35
4.8.1 Interrupt factors ... 37
4.8.2 Specific masks for interrupt ... 37
4.8.3 Interrupt vectors ... 38
4.8.4 I/O memory of interrupt ... 38
4.8.5 Programming notes ... 39
CHAPTER
5 B
ASICE
XTERNALW
IRINGD
IAGRAM____________________________ 40
CHAPTER6 E
LECTRICALC
HARACTERISTICS________________________________ 41 6.1 Absolute Maximum Rating ... 41
6.2 Recommended Operating Conditions ... 41
6.3 DC Characteristics ... 41
6.4 Analog Circuit Characteristics and Current Consumption ... 42
6.5 Oscillation Characteristics ... 43
CHAPTER
7 P
ACKAGE________________________________________________ 44 7.1 Plastic Package ... 44
7.2 Ceramic Package for Test Samples ... 45
CHAPTER
8 P
ADL
AYOUT_____________________________________________ 46 8.1 Pad layout diagram ... 46
8.2 Pad coordinates ... 46
CHAPTER
9 P
RECAUTIONSONM
OUNTING_________________________________ 47
CHAPTER 1: INTRODUCTION
CHAPTER 1 I NTRODUCTION
The E0C6011 single-chip microcomputer features an E0C6200B CMOS 4-bit CPU as the core. It contains a 1,536 (words) × 12 (bits) ROM, 144 (words) × 4 (bits) RAM, LCD driver, 4-bit input port (K00–K03), 4-bit output port (R00–R03), 8-bit I/O port (P00–P03, P10–P13) and a timer.
1.1 Features
Core CPU... E0C6200B
Built-in oscillation circuit... CR oscillation circuit
Typ. 65 kHz, 130 kHz, 195 kHz or 260 kHz is selectable by mask option. (C, R built-in)
Instruction set... 101 instructions (supports SLEEP mode.) ROM capacity... 1,536 words × 12 bits
RAM capacity... 144 words × 4 bits
Input port... 4 bits Pull-down resistors are available by mask option.
Output port... 4 bits Clock and buzzer outputs are selectable by mask option.
I/O port... 8 bits
LCD driver... 38 segments × 4, 3 or 2 commons
1/4, 1/3 or 1/2 duty and 1/3 bias for 4.5 V LCD panel or 1/2 bias for 3 V LCD panel are selectable by mask option.
LCD frame frequency (fOSC/2,048 Hz, fOSC/4,096 Hz, fOSC/6,144 Hz or fOSC/8,192 Hz) is selectable by software.
Time base counter... 1 system (clock timer) built-in
Interrupt... External: Input port interrupt 1 system Internal: Timer interrupt 1 system Reset input... Supports differential pulse reset.
Supply voltage... 1.2 to 1.8 V
Current consumption... During SLEEP: Max. 0.3 µA
During HALT: Typ. 4 µA (65 kHz) (without panel load) Typ. 8 µA (130 kHz)
Typ. 11 µA (195 kHz) Typ. 14 µA (260 kHz) During operation: Typ. 8 µA (65 kHz) (without panel load) Typ. 15 µA (130 kHz)
Typ. 20 µA (195 kHz) Typ. 26 µA (260 kHz) Supply form... Die form, QFP5-80pin plastic package
or QFP14-80pin plastic package
CHAPTER 1: INTRODUCTION
1.2 Block Diagram
COM0–3 SEG0–37 VDD
VL1–VL3
CA, CB VSS
K00–K03 TEST
fOSC fCLK
RESET
R00, R03 (BZ, BZ)∗1 R01
R02 (FOUT)∗1
∗1: Terminal specifications can be selected by mask option.
P00–P03 P10–P13
Core CPU E0C6200B
ROM
1,536 words × 12 bits
System Reset Control
Interrupt Generator RAM
144 words × 4 bits
Clock Timer LCD Driver 38 SEG × 4 COM
Power Controller
OSC Frequency
Control
I/O Port Input Port
Output Port
Fig. 1.2.1 E0C6011 block diagram
CHAPTER 1: INTRODUCTION
1.3 Pin Layout
QFP14-80pin
41 60
21 40
INDEX
20 1
80 61
No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Name N.C.
N.C.
SEG19 TEST SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35
No.
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Name SEG36 N.C.
N.C.
SEG37 K03 K02 K01 K00 P13 P12 P11 P10 P03 P02 P01 P00 R02 R01 R00 R03
No.
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
Name N.C.
N.C.
VSS RESET
N.C.
N.C.
N.C.
VDD VL3 VL2 VL1 CB CA COM3 COM2 COM1 COM0 SEG0 N.C.
N.C.
No.
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
Name N.C.
SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 N.C.
N.C. : No Connection
Fig. 1.3.1 Pin layout (QFP14-80pin)
QFP5-80pin
41 64
25 40
INDEX
24 1
80 65
No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Name SEG35 N.C.
N.C.
SEG36 SEG37 K03 K02 K01 K00 P13 P12 P11 P10 P03 P02 P01 P00 R02 R01 R00
No.
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Name R03 N.C.
N.C.
N.C.
VSS RESET
N.C.
N.C.
N.C.
VDD VL3 VL2 VL1 CB CA COM3 COM2 COM1 COM0 SEG0
No.
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
Name N.C.
N.C.
SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18
No.
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
Name N.C.
N.C.
N.C.
SEG19 TEST SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 N.C. : No Connection
Fig. 1.3.2 Pin layout (QFP5-80pin)
CHAPTER 1: INTRODUCTION
1.4 Pin Description
Table 1.4.1 Pin description Pin name
VDD
VSS
VL1–3
CA, CB K00–03 P00–03 P10–13 R00 R03 R01 R02 SEG0–37
COM0–3 RESET TEST
Function Power supply terminal (+)
Power supply terminal (-) Power source for LCD
Booster capacitor connecting terminal Input port terminal
I/O port terminal I/O port terminal
Output port terminal (BZ output is selectable *) Output port terminal (BZ output is selectable *) Output port terminal
Output port terminal (FOUT output is selectable *) LCD segment output (DC output is selectable *)
LCD common output terminal (1/4, 1/3 or 1/2 duty are selectable *) Initial reset input terminal
Test input terminal QFP14
48 43 51–49 53, 52 28–25 36–33 32–29 39 40 38 37 58, 62–79,
3–21, 24 57–54
44 4
Pin No.
QFP5 30 25 33–31 35, 34 9–6 17–14 13–10 20 21 19 18 40, 43–60, 64, 66–80,
1, 4, 5 39–36 26 65
I/O (I) (I) – – I I/O I/O O O O O O
O I I
∗ Can be selected by mask option
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
CHAPTER 2 P OWER S UPPLY AND I NITIAL R ESET
2.1 Power Supply
With a single external power supply (∗) supplied to VDD through VSS, the E0C6011 generates the neces- sary internal voltages (<VL1–VL3> for driving LCD) with the internal power supply circuit.
∗ Supply voltage: 1.5 V (1.2 V to 1.8 V)
The internal power supply circuit is configured according to the LCD drive voltage specification selected by mask option. Figure 2.1.1 shows the configuration of the power supply circuit.
VDD VL1 VL2 VL3 CA CB VSS
1.5 V C2
C3
C1 0.1µF 0.1µF
0.1µF VDD
VL1=VSS VL2=2VL1 VL3=3VL1
VSS
4.5 V LCD Panel
1/4, 1/3 or 1/2 duty, 1/3 bias
VL1 and VSS are shorted internally.
Note:
LCD voltage
circuit
VDD VL1 VL2 VL3 CA CB VSS
1.5 V C2
C1 0.1µF
0.1µF VDD
VL1=VSS VL2=VSS VL3=2VL1
VSS
3 V LCD Panel
1/4, 1/3 or 1/2 duty, 1/2 bias
VL1 and VSS are shorted internally.
Note:
LCD voltage
circuit
Fig. 2.1.1 Power supply configuration and external elements
Notes: • External loads cannot be driven by the output voltage of the internal power supply circuit.
• See Chapter 6, "ELECTRICAL CHARACTERISTICS", for voltage values.
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
2.2 Initial Reset
To initialize the E0C6011 circuits, an initial reset must be executed. There are two ways of doing this.
(1) Initial reset by the power-on reset circuit (2) External initial reset via the RESET terminal
Figure 2.2.1 shows the configuration of the initial reset circuit.
VSS
Initial reset fCLK
fOSC (to CPU)
RESET Reset
detection Frequency
select circuit OSC1 oscillation circuit
Power-on reset circuit
Divider
∗ fCLK is selectable from fOSC Hz, fOSC/2 Hz, fOSC/3 Hz or fOSC/4 Hz using the CLKFQ1–CLKFQ0 register.
Fig. 2.2.1 Configuration of initial reset circuit
2.2.1 Power-on reset circuit
The power-on reset circuit outputs the initial reset signal at power-on until the oscillation circuit starts oscillating.
Note: The power-on reset circuit may not work properly due to unstable or lower voltage input. The following initial reset method is recommended to generate the initial reset signal.
2.2.2 Reset terminal (RESET)
Initial reset can be executed externally by setting the reset terminal to a high level (VDD). There exists the external reset pulse detect circuit inside of the E0C6011. When this circuit detects the external reset signal, the internal reset signal turns high at the rising edge of the reset signal detect pulse. After about 10 msec (when fCLK = 65 kHz) has passed, the internal reset signal goes low to canceling the reset even if the external reset signal (RESET) keeps high level. An external reset must keep high level at least 1 msec (when fCLK = 65 kHz). Figure 2.2.2.1 shows the timing waveform of initial reset.
External reset signal 1 kHz clock Reset detection Internal reset signal
Min. 1 msec
Approx. 10 msec
Fig. 2.2.2.1 Initial reset timing waveform
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
2.2.3 Internal register following initialization
An initial reset initializes the CPU as shown in the table below.
Table 2.2.3.1 Initial values
∗ See Section 4.1, "Memory Map".
Name Program counter step Program counter page New page pointer Stack pointer Index register X Index register Y Register pointer
General-purpose register A General-purpose register B Interrupt flag
Decimal flag Zero flag Carry flag
CPU Core Symbol PCS PCP NPP SP
X Y RP
A B I D Z C
Bit size 8 4 4 8 8 8 4 4 4 1 1 1 1
Initial value 00H
1H 1H Undefined Undefined Undefined Undefined Undefined Undefined
0 0 Undefined Undefined
Name RAM
Display memory Other peripheral circuits
Peripheral Circuits Bit size
4 4 4
Initial value Undefined Undefined
∗
2.3 Test Terminal (TEST)
This terminal is used when IC is inspected for shipment. During normal operation connect it to VSS or leave it open.
CHAPTER 3: CPU, ROM, RAM
CHAPTER 3 CPU, ROM, RAM
3.1 CPU
The E0C6011 employs the E0C6200B core CPU, so that register configuration, instructions, and so forth are virtually identical to those in other processors in the family using the E0C6200/6200A/6200B. Refer to the "E0C6200/6200A Core CPU Manual" for details of the E0C6200B.
Note the following points with regard to the E0C6011:
(1) Since the E0C6011 provides the SLEEP function, the SLP instruction can be used.
(2) Because the ROM capacity is 1,536 words, 12 bits per word, bank bits are unnecessary, and PCB and NBP are not used.
(3) The RAM page is set to 0 only, so the page part (XP, YP) of the index register that specifies addresses is invalid.
PUSH XP POP XP LD XP,r LD r,XP PUSH YP POP YP LD YP,r LD r,YP
3.2 ROM
The built-in ROM, a mask ROM for the program, has a capacity of 1,536 × 12-bit steps. The program area is 6 pages (0–5), each consisting of 256 steps (00H–FFH). After an initial reset, the program start address is set to page 1, step 00H. The interrupt vectors are allocated to page l, steps 01H–0FH.
Step 00H
Step 0FH Step 10H
Step FFH 12 bits
Program start address
Interrupt vector area Bank 0
Program area
Page 0 Page 1 Page 2 Page 3 Page 4 Page 5
Step 01H
Fig. 3.2.1 ROM configuration
3.3 RAM
The RAM, a data memory for storing a variety of data, has a capacity of 144 words, 4-bit words. When programming, keep the following points in mind:
(1) Part of the data memory is used as stack area when saving subroutine return addresses and registers, so be careful not to overlap the data area and stack area.
(2) Subroutine calls and interrupts take up three words on the stack.
(3) Data memory 000H–00FH is the memory area pointed by the register pointer (RP).
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
CHAPTER 4 P ERIPHERAL C IRCUITS AND O PERATION
Peripheral circuits (timer, I/O, and so on) of the E0C6011 are memory mapped. Thus, all the peripheral circuits can be controlled by using memory operations to access the I/O memory. The following sections describe how the peripheral circuits operate.
4.1 Memory Map
The data memory of the E0C6011 has an address space of 205 words, of which 48 words are allocated to display memory and 13 words, to I/O memory. Figure 4.1.1 show the overall memory map for the E0C6011, and Table 4.1.1, the memory maps for the peripheral circuits (I/O space).
Address Page High
Low 0 M0
1 M1
2 M2
3 M3
4 M4
5 M5
6 M6
7 M7
8 M8
9 M9
A MA
B MB
C MC
D MD
E ME
F MF 0
1 2 3 4 5 6 7 8 9 A B C D E F 0
RAM area 112 words × 4 bits (R/W)
RAM area 32 words × 4 bits (R/W)
Unused area I/O memory See Table 4.1.1
I/O memory See Table 4.1.1
Fig. 4.1.1 Memory map
Address Page High
Low
0 1 2 3 4 5 6 7 8 9 A B C D E F
4 or C 5 or D 6 or E 0
Display memory 48 words × 4 bits 40H–6FH = R/W C0H–EFH = W only
Fig. 4.1.2 Display memory map
Notes: • The display memory area can be selected from between 40H–6FH and C0H–EFH by mask option.
When 40H–6FH is selected, the display memory is assigned in the RAM area. So read/write operation is allowed.
When C0H–EFH is selected, the display memory is assigned as a write-only memory.
• Memory is not mounted in unused area within the memory map and in memory area not indi- cated in this chapter. For this reason, normal operation cannot be assured for programs that have been prepared with access to these areas.
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
Table 4.1.1 I/O memory map
Address Comment
D3 D2
Register
D1 D0 Name Init ∗1 1 0
073H
K03 K02 K01 K00
R
K03 K02 K01 K00
– ∗2 – ∗2 – ∗2 – ∗2
High High High High
Low Low Low Low
Input port data (K00–K03) 070H
TM3 TM2 TM1 TM0
R
TM3 TM2 TM1 TM0
0 0 0 0
Clock timer data (2 Hz) Clock timer data (4 Hz) Clock timer data (8 Hz) Clock timer data (16 Hz)
075H
EIK03 EIK02 EIK01 EIK00 R/W
EIK03 EIK02 EIK01 EIK00
0 0 0 0
Enable Enable Enable Enable
Mask Mask Mask Mask
Interrupt mask register (K00–K03)
07EH
TMRST 0 0 IOC0
W R R/W
TMRST 0 ∗3 0 ∗3 IOC0
Reset – ∗2 – ∗2 0
Reset – – Output
– – – Input
Clock timer reset Unused Unused
I/O control register 0 (P00–P03) 078H
CSDC EIT2 EIT8 EIT32
R/W
CSDC EIT2 EIT8 EIT32
0 0 0 0
Static Enable Enable Enable
Dynamic Mask Mask Mask
LCD drive switch
Interrupt mask register (clock timer 2 Hz) Interrupt mask register (clock timer 8 Hz) Interrupt mask register (clock timer 32 Hz)
0FFH
CLKFQ1 CLKFQ0 0 LCDON
R R/W
R/W
CLKFQ1 CLKFQ0 0 ∗3 LCDON
0 0 – ∗2
1 – On
– Off
Peripheral system clock selection Unused
LCD display On/Off conrol 079H
0 IT2 IT8 IT32
R
0 ∗3 IT2 ∗4 IT8 ∗4 IT32 ∗4
– ∗2 0 0 0
– Yes Yes Yes
– No No No
Unused
Interrupt factor flag (clock timer 2 Hz) Interrupt factor flag (clock timer 8 Hz) Interrupt factor flag (clock timer 32 Hz)
07AH
0 IK0 0 0
R
0 ∗3 IK0 ∗4 0 ∗3 0 ∗3
– ∗2 0 – ∗2 – ∗2
– Yes
– –
– No
– –
Unused
Interrupt factor flag (K00–K03) Unused
Unused
07CH
R03 R02 R01 R00
R/W
R03 R02 R01 R00
0 0 0 0
High High High High
Low Low Low Low
Output port (R03, BZ) Output port (R02, FOUT) Output port (R01) Output port (R00, BZ)
07DH
P03 P02 P01 P00
R/W
P03 P02 P01 P00
– ∗2 – ∗2 – ∗2 – ∗2
High High High High
Low Low Low Low
I/O port data (P00–P03) Output latch is reset at initial reset
0FEH
0 0 0 IOC1
R R/W
0 ∗3 0 ∗3 0 ∗3 IOC1
– ∗2 – ∗2 – ∗2 0
– – – Output
– – – Input
Unused Unused Unused
I/O control register 1 (P10–P13) 0FDH
P13 P12 P11 P10
R/W
P13 P12 P11 P10
– ∗2 – ∗2 – ∗2 – ∗2
High High High High
Low Low Low Low
I/O port data (P10–P13) Output latch is reset at initial reset
∗1
∗2
∗3
Initial value at initial reset Not set in the circuit Always "0" being read
∗4
∗5
Reset (0) immediately after being read
fCLK is selectable from fOSC, fOSC/2, fOSC/3 and fOSC/4 using the CLKFQ1–CLKFQ0 register.
0F6H
BZFQ 0 0 0
R/W R
BZFQ 0 ∗3 0 ∗3 0 ∗3
0 – ∗2 – ∗2 – ∗2
fCLK/32 – – –
fCLK/16 – – –
Buzzer frequency selection ∗5 Unused
Unused Unused
00 fOSC
01 fOSC/2
10 fOSC/3
11 fOSC/4 [CLKFQ1, 0]:
fCLK:
When fCLK = 65,536 Hz
When fCLK
= 65,536 Hz
When fCLK
= 65,536 Hz
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
4.2 Oscillation Circuit
The E0C6011 has a built-in CR oscillation circuit that generates the operating clock of the CPU and the peripheral circuit.
4.2.1 CR oscillation circuit
The CR oscillation circuit has a built-in capacitor and resistors, and an oscillation frequency can be selected by mask option.
The E0C6011 has a frequency divider circuit controlled by the CLKFQ1 and CLKFQ0 registers. These registers control the peripheral clock frequency fCLK. The CPU operate with the fOSC clock generated by the oscillation circuit.
Figure 4.2.1.1 shows the configuration of the CR oscillation circuit.
To CPU
CLKFQ1 fOSC
fCLK
Mask option
To peripheral circuits CCR
CLKFQ0
RCR System clock
select circuit
Fig. 4.2.1.1 Configuration of CR oscillation circuit
As Figure 4.2.1.1 indicates, the CR oscillation circuit can be configured using the built-in resistor RCR with different frequency selected by mask option.
4.2.2 Mask option
The mask option allows selection of an oscillation frequency using the built-in resistor. The following shows the alternatives of the mask option.
Table 4.2.2.1 Mask option for CR oscillation circuit No.
1 2 3 4
Clock frequency fOSC = 65 kHz fOSC = 130 kHz fOSC = 195 kHz fOSC = 260 kHz
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
4.2.3 I/O memory for peripheral system clock
Table 4.2.3.1 lists the peripheral system clock control bits and their address.
Table 4.2.3.1 Peripheral system clock control bits
Address Comment
D3 D2
Register
D1 D0 Name Init ∗1 1 0
0FFH
CLKFQ1 CLKFQ0 0 LCDON
R R/W
R/W
CLKFQ1 CLKFQ0 0 ∗3 LCDON
0 0 – ∗2
1 – On
– Off
Peripheral system clock selection Unused
LCD display On/Off conrol
∗1
∗2
Initial value at initial reset Not set in the circuit
∗3
∗4
Always "0" being read
Reset (0) immediately after being read
00 fOSC
01 fOSC/2
10 fOSC/3
11 fOSC/4 [CLKFQ1, 0]:
fCLK:
CLKFQ1, CLKFQ0: Peripheral system clock select registers (0FFH•D3, D2)
Select an operating clock frequency fCLK for the peripheral system. This selection affects the LCD frame frequency, timer data output, power-on reset time and differential pulse reset time.
Table 4.2.3.2 Selecting pheripheral system clock CLKFQ1
0 0 1 1
1/3 duty 42.7 Hz 42.7 Hz 42.7 Hz 42.7 Hz 1/4, 1/2 duty
fOSC/2048 32 Hz when fOSC = 65 kHz fOSC/(2×2048) 32 Hz when fOSC = 130 kHz fOSC/(3×2048) 32 Hz when fOSC = 195 kHz fOSC/(4×2048) 32 Hz when fOSC = 260 kHz
LCD frame frequency CLKFQ0
0 1 0 1
fCLK
fOSC
fOSC/2 fOSC/3 fOSC/4 After an initial reset, these registers are set to "0".
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Input Ports)
4.3 Input Ports (K00–K03)
4.3.1 Configuration of input port
The E0C6011 has a 4-bit general-purpose input port. Each of the input port terminals (K00–K03) has an internal pull-down resistor. The pull-down resistor can be selected for each bit with the mask option.
Figure 4.3.1.1 shows the configuration of input port.
Mask option Address Data bus Kxx
Interrupt request VDD
VSS
Fig. 4.3.1.1 Configuration of input port
Selecting "pull-down resistor enabled" with the mask option allows input from a push button, key matrix, and so forth. When "pull-down resistor disabled" is selected, the port can be used for slide switch input and interfacing with other LSIs.
4.3.2 Interrupt function
All four input port bits (K00–K03) provide the interrupt function. The conditions for issuing an interrupt can be set by the software for the four bits. Also, whether to mask the interrupt function can be selected individually for all four bits by the software. Figure 4.3.2.1 shows the configuration of K00–K03.
Data bus
Address Interrupt mask
register (EIK)
Kxx
Mask option (K00–K03)
Noise rejector
Interrupt factor
flag (IK0) Interrupt
request
Address Address
Fig. 4.3.2.1 Input interrupt circuit configuration (K00–K03)
The interrupt mask registers (EIK00–EIK03) enable the interrupt mask to be selected individually for K00–K03. An interrupt occurs when the input value which are not masked change and the interrupt factor flag (IK0) is set to "1".
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Input Ports)
Input interrupt programming related precautions
Port K input
Factor flag set Not set Mask register
Active status
➀
When the content of the mask register is rewritten, while the port K input is in the active status. The input interrupt factor flag is set at ➀.
Fig. 4.3.2.2 Input interrupt timing
When using an input interrupt, if you rewrite the content of the mask register, when the value of the input terminal which becomes the interrupt input is in the active status (input terminal = high status), the factor flag for input interrupt may be set.
For example, a factor flag is set with the timing of ➀ shown in Figure 4.3.2.2. However, when clearing the content of the mask register with the input terminal kept in the high status and then setting it, the factor flag of the input interrupt is again set at the timing that has been set.
Consequently, when the input terminal is in the active status (high status), do not rewrite the mask register (clearing, then setting the mask register), so that a factor flag will only set at the rising edge in this case. When clearing, then setting the mask register, set the mask register, when the input terminal is not in the active status (low status).
4.3.3 Mask option
The contents that can be selected with the input port mask option are as follows:
(1) An internal pull-down resistor can be selected for each of the four bits of the input ports (K00–K03).
Having selected "pull-down resistor disabled", take care that the input does not float. Select "pull- down resistor enabled" for input ports that are not being used.
(2) The input interrupt circuit contains a noise rejection circuit to prevent interrupts form occurring through noise. The mask option enables selection of the noise rejection circuit. When "use" is selected, a maximum delay of 0.5 msec (fCLK = 65 kHz) occurs from the time an interrupt condition is estab- lished until the interrupt factor flag (IK0) is set to "1".
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Input Ports)
4.3.4 I/O memory of input port
Table 4.3.4.1 list the input port control bits and their addresses.
Table 4.3.4.1 Input port control bits
Address Comment
D3 D2
Register
D1 D0 Name Init ∗1 1 0
073H
K03 K02 K01 K00
R
K03 K02 K01 K00
– ∗2 – ∗2 – ∗2 – ∗2
High High High High
Low Low Low Low
Input port data (K00–K03)
075H
EIK03 EIK02 EIK01 EIK00 R/W
EIK03 EIK02 EIK01 EIK00
0 0 0 0
Enable Enable Enable Enable
Mask Mask Mask Mask
Interrupt mask register (K00–K03)
∗1
∗2
Initial value at initial reset Not set in the circuit
∗3
∗4
Always "0" being read
Reset (0) immediately after being read 07AH
0 IK0 0 0
R
0 ∗3 IK0 ∗4 0 ∗3 0 ∗3
– ∗2 0 – ∗2 – ∗2
– Yes
– –
– No
– –
Unused
Interrupt factor flag (K00–K03) Unused
Unused
K00–K03: Input port data (073H)
The input data of the input port terminals can be read with these registers.
When "1" is read: High level When "0" is read: Low level
Writing: Invalid
The value read is "1" when the terminal voltage of the input port (K00–K03) goes high (VDD), and "0"
when the voltage goes low (VSS). These are read only bits, so writing cannot be done.
EIK00–EIK03: Interrupt mask registers (075H)
Masking the interrupt of the input port terminals can be done with these registers.
When "1" is written: Enable When "0" is written: Mask
Reading: Valid
With these registers, masking of the input port bits can be done for each of the four bits.
After an initial reset, these registers are all set to "0".
IK0: Interrupt factor flag (07AH•D2)
This flag indicates the occurrence of an input interrupt.
When "1" is read: Interrupt has occurred When "0" is read: Interrupt has not occurred
Writing: Invalid
The interrupt factor flag IK0 is associated with K00–K03. From the status of this flag, the software can decide whether an input interrupt has occurred.
This flag is reset when the software has read it.
Reading of interrupt factor flag is available at EI, but be careful in the following cases.
If the interrupt mask register value corresponding to the interrupt factor flag to be read is set to "1", an interrupt request will be generated by the interrupt factor flag set timing, or an interrupt request will not
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
4.4 Output Ports (R00–R03)
4.4.1 Configuration of output port
The E0C6011 has a 4-bit general output port (R00–R03).
Output specification of the output port can be selected in a bit units with the mask option. Two kinds of output specifications are available: complementary output and Pch open drain output. Also, the mask option enables the output ports R00, R02 and R03 to be used as special output ports. Figure 4.4.1.1 shows the configuration of the output port.
Register
Data bus
Address
VDD
VSS
Rxx
Complementary Pch open drain
Mask option Fig. 4.4.1.1 Configuration of output port
4.4.2 Mask option
The mask option enables the following output port selection.
(1) Output specification of output port
The output specifications for the output port (R00–R03) may be set to either complementary output or Pch open drain output for each of the four bits. However, even when Pch open drain output is selected, a voltage exceeding the source voltage must not be applied to the output port.
(2) Special output
In addition to the regular DC output, special output can be selected for output ports R00, R02 and R03, as shown in Table 4.4.2.1. Figure 4.4.2.1 shows the structure of output ports R00–R03.
Table 4.4.2.1 Special output Output port
R00 R03 R02
Special output BZ output BZ output FOUT output
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
Register R00
Data bus
Register R03
R01 Register R01
Register R02
Address 07CH
Mask option
R03 BZ
R00
FOUT
R02
Fig. 4.4.2.1 Structure of output ports R00–R03
BZ, BZ (R00, R03)
The output ports R00 and R03 may be set to BZ output and BZ output (BZ reverse output), respectively, allowing for direct driving of the piezo-electric buzzer.
The BZ output is controlled by the R00 register. For the BZ output, the R00 register or the R03 register can be selected as the control register by mask option. When the R00 register is selected, the BZ and BZ outputs are controlled by the R00 register simultaneously.
The frequency of buzzer output may be selected by software to be either 2 kHz or 4 kHz (when fCLK = 65 kHz). Figure 4.4.2.2 shows the output waveform.
R00(R03) register BZ output (R00 terminal) BZ output (R03 terminal)
"0" "1" "0"
Fig. 4.4.2.2 Output waveform of BZ and BZ Notes: • A hazard may occur when the buzzer signal is turned on or off.
• When the R00 port is set for DC output, the R03 port cannot be set for the BZ output.
FOUT (R02)
When the output port R02 is set as the FOUT output port, the R02 will output the fCLK (peripheral system clock frequency) clock or the clock that is generated by dividing the fCLK clock. The clock frequency can be selected from among 8 types by mask option.
The types of frequency which can be selected are
Table 4.4.2.2 FOUT clock frequency Setting value
fCLK/2 fCLK/4 fCLK/8 fCLK/16
Clock frequency (Hz)*
32,768 16,384 8,192 4,096
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
The FOUT output is controlled by the R02 register.
Figure 4.4.2.3 shows the output waveform.
R02 register
FOUT output (R02 terminal)
"0" "1" "0"
Fig. 4.4.2.3 Output waveform of FOUT
Note: A hazard may occur when the FOUT signal is turned on or off.
4.4.3 I/O memory of output port
Table 4.4.3.1 lists the output port control bits and their addresses.
Table 4.4.3.1 Control bits of output port
Address Comment
D3 D2
Register
D1 D0 Name Init ∗1 1 0
07CH
R03 R02 R01 R00
R/W
R03 R02 R01 R00
0 0 0 0
High High High High
Low Low Low Low
Output port (R03, BZ) Output port (R02, FOUT) Output port (R01) Output port (R00, BZ)
∗1
∗2
∗3
Initial value at initial reset Not set in the circuit Always "0" being read
∗4
∗5
Reset (0) immediately after being read
fCLK is selectable from fOSC, fOSC/2, fOSC/3 and fOSC/4 using the CLKFQ1–CLKFQ0 register.
0F6H
BZFQ 0 0 0
R/W R
BZFQ 0 ∗3 0 ∗3 0 ∗3
0 – ∗2 – ∗2 – ∗2
fCLK/32 – – –
fCLK/16 – – –
Buzzer frequency selection ∗5 Unused
Unused Unused
R00–R03 (when DC output is selected): Output port data (07CH) Sets the output data for the output ports.
When "1" is written: High output When "0" is written: Low output
Reading: Valid
The output port terminals output the data written to the corresponding registers (R00–R03) without changing it. When "1" is written to the register, the output port terminal goes high (VDD), and when "0" is written, the output port terminal goes low (VSS).
After an initial reset, all the registers are set to "0".
R00, R03 (when buzzer output is selected): Buzzer output control (07CH•D0, D3) Controls the buzzer output.
When "1" is written: Buzzer output When "0" is written: Low level (DC) output
Reading: Valid
The BZ signal is output from the R00 terminal by writing "1" to the R00 register. When "0" is written, the R00 terminal goes low.
For the BZ signal, either "R03 control" or "R00 control" can be selected by mask option.
When "R03 control" is selected, the BZ signal is output from the R03 terminal by writing "1" to the R03 register. When "0" is written to the R03 register, the R03 terminal goes low.
When "R00 control" is selected, the BZ and BZ signals are output simultaneously by writing "1" to the R00 register. When "0" is written to the R00 register, the R00 and R03 terminals go low.
After an initial reset, these registers are set to "0".
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
BZFQ: Buzzer frequency selection (0F6H•D3) Selects the frequency of the buzzer signal.
When "1" is written: fCLK/32 Hz When "0" is written: fCLK/16 Hz
Reading: Valid
When R00 and R03 ports are set to buzzer output, the frequency of the buzzer signal can be selected using this register.
When "1" is written to this register, the frequency is set to fCLK/32 (2 kHz when fCLK = 65 kHz) and when
"0" is written, it is set to fCLK/16 (4 kHz when fCLK = 65 kHz). fCLK is the peripheral system clock con- trolled by the CLKFQ1–CLKFQ0 register.
After an initial reset, this register is set to "0".
R02 (when FOUT is selected): FOUT output control (07CH•D2) Controls the FOUT (fosc clock) output.
When "1" is written: Clock output
When "0" is written: Low level (DC) output Reading: Valid
The FOUT signal is output from the R02 terminal by writing "1" to the R02 register. When "0" is written, the R02 terminal goes low.
After an initial reset, this register is set to "0".
4.4.4 Programming note
The buzzer (BZ, BZ) or FOUT signal may produce hazards when it is turned on or off by the control register.
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (I/O Ports)
4.5 I/O Ports (P00–P03, P10–P13)
4.5.1 Configuration of I/O port
The E0C6011 has 8 bits of general-purpose I/O ports. Figure 4.5.1.1 shows the configuration of the I/O port. Each 4-bit I/O port (P00–P03 and P10–P13) can be set to either input mode or output mode by writing data to the I/O control register.
Address
Address
Register Input control
I/O control register
(IOC)
Data bus
Pxx
Vss Fig. 4.5.1.1 Configuration of I/O port
4.5.2 I/O control register and I/O mode
Input or output mode can be set for each 4-bit I/O port (P00–P03, P10–P13) by writing data to the I/O control register (IOC0, IOC1).
To set the input mode, write "0" to the I/O control register. When an I/O port is set to input mode, it becomes high impedance status and works as an input port. However, the input line is pulled down when input data is read.
The output mode is set when "1" is written to the I/O control register. When an I/O port is set to output mode, it works as an output port. The port terminal goes high (VDD) when the port output data is set to
"1", and goes low (VSS) when the port output data is set to "0".
After an initial reset, the I/O control registers are set to "0", and the I/O ports enter the input mode.
4.5.3 Mask option
The output specification during output mode (IOCx = "1") of the I/O port can be set with the mask option for either complementary output or Pch open drain output. This setting can be performed for each bit of the I/O port. However, when Pch open drain output has been selected, voltage in excess of the supply voltage must not be applied to the port.
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (I/O Ports)
4.5.4 I/O memory of I/O port
Table 4.5.4.1 lists the I/O port control bits and their addresses.
Table 4.5.4.1 I/O port control bits
Address Comment
D3 D2
Register
D1 D0 Name Init ∗1 1 0
07DH
P03 P02 P01 P00
R/W
P03 P02 P01 P00
– ∗2 – ∗2 – ∗2 – ∗2
High High High High
Low Low Low Low
I/O port data (P00–P03) Output latch is reset at initial reset
0FEH
0 0 0 IOC1
R R/W
0 ∗3 0 ∗3 0 ∗3 IOC1
– ∗2 – ∗2 – ∗2 0
– – – Output
– – – Input
Unused Unused Unused
I/O control register 1 (P10–P13) 0FDH
P13 P12 P11 P10
R/W
P13 P12 P11 P10
– ∗2 – ∗2 – ∗2 – ∗2
High High High High
Low Low Low Low
I/O port data (P10–P13) Output latch is reset at initial reset
∗1
∗2
Initial value at initial reset Not set in the circuit
∗3
∗4
Always "0" being read
Reset (0) immediately after being read 07EH
TMRST 0 0 IOC0
W R R/W
TMRST 0 ∗3 0 ∗3 IOC0
Reset – ∗2 – ∗2 0
Reset – – Output
– – – Input
Clock timer reset Unused Unused
I/O control register 0 (P00–P03)
P00–P03, P10–P13: I/O port data registers (07DH, 0FDH)
I/O port data can be read and output data can be set through these registers.
Writing
When "1" is written: High level When "0" is written: Low level
When an I/O port is set to the output mode, the written data is output from the I/O port terminal. When
"1" is written as the port data, the port terminal goes high (VDD), and when "0" is written, the terminal goes low (VSS). Data can also be written in the input mode.
Reading
When "1" is read: High level When "0" is read: Low level
The terminal voltage level of the I/O port is read out. When the I/O port is in the input mode the voltage level being input to the port can be read; in the output mode the output voltage level can be read. When the terminal voltage is high (VDD), the port data read is "1", and when the terminal voltage is low (VSS) the data read is "0". Also, the built-in pull-down resistor functions during reading, so the I/O port terminal is pulled down.
Note: When the I/O port is set to the input mode and a low-level voltage (Vss) is input, an erroneous input results if the time constant of the capacitive load of the input line and the built-in pull-down resistor load is greater than the read-out time. When the input data is being read, the time that the input line is pulled down is equivalent to 0.5 cycles of the CPU system clock. Hence, the electric potential of the terminals must settle within 0.5 cycles. If this condition cannot be met, some measure must be devised, such as arranging a pull-down resistor externally, or performing multiple read-outs.