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DMC42P4008

4Bit Single Chip Microcontroller

Daewoo Semiconductor 

4Bit Single Chip Microcontroller

2

DMC42C4008

FEATURE

Memory mapped I/O

Program memory : 8192 x 10bits

Data memory : 512 x 4bits

8-bit A/D converter

- 8-bit successive approximate type

- 8 channels

- Sample and hold

- Conversion time : 17.1 us at 4.19MHz

Instructions

- Various bit manipulation

- 8-bit data operation

- 7-bit relative branch

- 1 byte absolute call

Instruction cycle times

- Main ( XI = 4.19MHz )

. 15.3 us ( XI/64 = 65.5KHz )

. 1.91 us ( XI/8 = 524.0KHz )

. 0.95 us ( XI/4 = 1.05MHz )

4 Register Bank

General register : 8 x 4-bit respectively

Accumulator

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

8 bit Accumulator (XA)

Key scan

- 4, 6, 8 Pins Selectable : Port 4, 5

- Falling edge operation

56 I/O Ports

- CMOS Ports : 40

- N-channel open drain Ports : 16

- Direct LED drive

- Internal pull-up resistor (Mask option)

Power saving mode

- STOP : Main clock, CPU clock stop

- STBY : Only CPU clock stop

Main clock operation

Package : 64 QFP, 64 SDIP

Multiple vectored interrupt source

- External interrupt : 4

- Internal interrupt : 7

Watch timer

- fast mode : 3.91 msec

- normal mode : 0.5 sec

- buzzer output : 1, 2, 4 KHz

APPLICATION

VTR, Audio, Telephone, Printer, Refrigerator

Fan Heater, Washing Machine

Basic interval timer

- 8 kinds of period

- Used stabilization wait timer to wake up Stop mode

Three 8-bit timer / event counters

8-bit serial communication interface

- External / Internal clock selection

- Mode : Transmit ·Receive

Receive only

Clock continuous

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