4Bit Single Chip Microcontroller

DMC42C1008

DESCRIPTION

The DMC42C1008 is a microcomputer of the 4-bit single chip

microcomputer DMC42xx series which can match an 8-bit

microcomputer in the data processing capability.

The DMC42C1008 can handle 1-bit, 4-bit, and 8-bit data

as well as operates at high speed (minimum instruction

execution time : 0.95us) it contains a LCD pannel controller/driver.

PIN CONFIGURATION

P02/INT2

P00/INT0/TI0

P01/INT1

BIAS

VLC0

P62

P61

P60

VLC2

VLC1

P82

P81

P21

P20/CLO

P83

P63

P22

P80

SEG12

SEG14

SEG13

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG24

SEG27

SEG26

SEG25

COM0

SEG29

SEG28

COM3

COM2

COM1

SEG31

SEG30

P50/kS4

P42/kS2

P43/kS3

P33

XTI

XTO

TEST

P40/kS0

P41/kS1

P32

P13/BUZ

P30

P31

P03/INT3

P10/SCK

P11/SI

P12/SO

P23

DMC42C1008

4Bit Single Chip Microcontroller

DMC42C1008

FEATURE

Memory mapped I/O

8-bit serial communication interface
- External / Internal clock selection

Program memory : 8192 x 10bits

- Mode : Transmit �Receive
Receive only

Data memory : 512 x 4bits

Clock continuous

Instructions

LCD controller/driver

- Various bit manipulation

- selectable number of segments ;

- 8-bit data operation

20/24/28/32 segment (4/8/12 lines can

- 7-bit relative branch

be specified as bit ports)

- 1 byte absolute call

- Display mode selection
� Static

Instruction cycle times

� 1/2 duty (1/2 bias)

- Main ( XI = 4.19MHz )

� 1/3 duty (1/2 bias)

. 15.3 us ( XI/64 = 65.5KHz )

� 1/3 duty (1/3 bias)

. 1.91 us ( XI/8 = 524.0KHz )

� 1/4 duty (1/3 bias)

. 0.95 us ( XI/4 = 1.05MHz )
- Sub ( XTI = 32.768KHz )

Key scan

. 122 us ( XTI/4 = 8.19KHz )

- 4, 6, 8 Pins Selectable : Port 4, 5
- Falling edge operation

4 Register Bank

64 I/O Pins

General register : 8 x 4-bit respectively

- LCD driver output pins : 36
. Segment ouput pins : 20

Accumulator

. Segment CMOS output pins : 12

- Bit Accumulator (CY), 4 bit Accumulator (A),

. Common ounput pins : 4

8 bit Accumulator (XA)

- CMOS input/output pins : 32

Multiple vectored interrupt source

Power saving mode

- External interrupt : 4

- STOP : Main clock, CPU clock stop

- Internal interrupt : 4

- STBY : Only CPU clock stop
Main clock operation

Watch timer
- fast mode : 3.91 msec

Package : 80 QFP

- normal mode : 0.5 sec
- buzzer output : 1, 2, 4 KHz

APPLICATION

Basic interval timer
- 8 kinds of period

VTR, Camera, Rice Cooker, Telephone

- Used stabilization wait timer to wake up Stop mode

Blood Pressure Gauge, CD Player

One 8-bit timer / event counter

4Bit Single Chip Microcontroller

DMC42C1008

P20

�-

P23

P30

�-

P33

P60

�-

P63

P80

�-

P83

CPU
CLOCK

DMC42 CORE

BASIC

INTERVAL

TIMER

IRQBT

WATCH

TIMER

IRQTC0

TIMER/
EVENT

COUNTER

IRQWT

PORT2

PORT3

PORT6

PORT8

LCD

CONTROL

DRIVER

DISPLAY

RAM

PROGRAM MEMORY

(8192 X 10BITS)

Fx / 2

P20/CLO

RESETB

CLOCK

OUTPUT

CONTROL

CLOCK

GENERATOR

STOP/ IDLE

CONTROL

XTI

XTO

CLOCKED

SERIAL

INTERFACE

IRQS0

DATA MEMORY

(512 X 4BITS)

BIT SEQ.

BUFFER(16)

INTERRUPT

CONTROL

SEG0~SEG19

BIAS

VLC0~VLC2

COM0~COM3

SEG20~SEG30

(BP0~BP11)

LCD

FLCD

BUZ/P13

SO/P12

SI/P11

SCK/P10

TI0/INT0/P00

KS0/P40
KS7/P53

INT3/P03

INT1/P01
INT2/P02

CLOCK

DIVIDER

TEST

BLOCK DIAGRAM

4Bit Single Chip Microcontroller

DMC42C1008

PROGRAM MEMORY (ROM)

VECTOR ADDRESS

CONTENTS

Prioty

INTERRUPT SUORCE

0000H

VECTOR

0000H

RESET

Reset Signal

ADDRESS AREA

0002H

IRQBT

Basic Interval Timer

001FH

0004H

IRQ0

External interrupt 0

0020H

ZERO-PAGE

0006H

IRQ1

External interrupt 1

CALL AREA

0008H

IRQTC0

Timer Event Counter 0

002FH

000AH

0060H

000CH

IRQ2

External interrupt 2

000EH

0010H

IRQ3

External interrupt 3

0012H

IRQS0

Serial I/O 0

0014H

8K Byte

0016H

0018H

IRQWT

Watch Timer

001AH

IRQKS

Key Scan

001CH

1FFFH

001EH

reserved

DATA MEMORY (RAM)

DIRECT

INDIRECT

STACK

GENERAL

@HL

@DE @DL

$00

RB=0

RB=1

PAGE0

RB=2

RB=4

(256 Byte)

MP=0

SPS=0

$FF
$00
PAGE1
(256 Byte)

MB=0

MP=1

SPS=1

BANK 0 $FF

(1K)

$00
PAGE2
(256 Byte)

MP=2

SPS=2

$FF
$00
PAGE3

I/O

(256 Byte)

MEMORY

MP=3

; Usable

$FF

4Bit Single Chip Microcontroller

DMC42C1008

I/O ADDRESS MAP

ADDRESS

Hardware Module Name

R/W

Addressing Unit

REMARKS

INITIAL

1 bit

4 bit

8bit

VALUE

318H

Stack pointer low (SPL)

R/W

Stack pointer low

319H

Stack pointer high (SPH)

R/W

stack pointer high

31AH

SP3

SP2

SP1

SP0

R/W

Stack Page Select Low (SPSL)

31BH

SP5

SP4

R/W

Stack Page Select High (SPSh)

31CH

IS1

IS0

R/W

Psw low (PSWL)

31DH

Psw high (PSWH)

320H

T/E counter mode register 0

320H.3

Clock source select. counter

321H

(TMOD0)

start (ch0)

322H

T/E counter register 0

readable count value (ch0)

323H

(TMCNT0)

324H

T/E reference register 0

count reference register (ch0)

325H

(TMREF0)

332H

Basic Timer mode register(BMOD)

R/W

332H.3

clock select, Bit start

334H

Basic interval timer count

readable count register

335H

336H

Watch timer mode register

R/W

336H.3

clock/buzzer select. bit3

337H

(WMOD)

readable

390H

Lcd display mode register

duty/bias/clock/seg/bitport

391H

(LCDMD)

select

392H

Lcd control register (LCON)

display ON/OFF

3A0H

Power control register

system clock select, idle, stop

(PCON)

R/W

mode

3A2H

Operating mode register (SCMOD)

R/W

main/sub system clock select

3A4H

Clock output mode register

cpu clock output select, clock

(CLOMD)

out EN/DIS

3A8H

Serial interface mode register0

3A8H.3

receive/transmit mode. clock

3A9H

(SIOM0)

select

3AAH

Serial interface buffer0

R/W

serial shift register 0

3ABH

(SBUFF0)

3B2H

Power on flag (PONF)

P/W

3B2H.0

power on reset flag

3C2H

IME

R/W

3C2H.3

Interrupt priorty select, IME flag.

3C3H

IPSR3

IPSR2

IPSR1

IPSR0

3C4H

External interrupt mode register0

external interrupt 0 edge

(IMOD0)

detection

3C5H

External interrupt mode register1

external interrupt 1 edge

(IMOD1)

detection

3C6H

External interrupt mode register2

external interrupt 2 edge

(IMOD2)

detection

3C7H

External interrupt mode register3

external interrupt 3 edge

(IMOD3)

detection

3D8H

IE2

IRQ2

IEBT

IRQBT

R/W

Interrupt EN/IRQ flag

3D9H

IEWT

IRQWT

R/W

Interrupt EN/IRQ flag

Электронный компонент: DMC42C1008