1
4Bit Single Chip Microcontroller
DMC42C2008
DESCRIPTION
The DMC42C2008 is a 4-bit single chip micro-
computer with 8K bytes ROM, and is manufactured
with CMOS silicon gate technology.
The DMC42C2008 includes peripherals such as 8-bit
Timer/Event Counters, 4-bit A/D Converter, 14-bit
PWM, 8-bit PWM, 6-bit PWM, Watchdog Timer, 4-ch
External Interrupts and OSD controller.
It provides the hardware features, architectural
enhancements and instructions that are necessary
to make it a powerful and cost effective controller
for applications requiring up to 64K bytes of program-
mable memory.
FEATURE
Memory Mapped I/O
Program Memory : 8192 x 10 bits
Data Memory
: 512 x 4 bits
Instructions
- Various Bit Manipulation
- 8 bit Data Transfer, Compare, Arithmatic
- 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
PIN CONFIGURATION
PC.0/PWM14 1
P8.3
P0.3/INT3
P0.2/INT2
P0.1/INT1
P0.0/INT0
XI
XO
RESETB
P8.2
V
SS
P8.1
P8.0
V
DD
P2.3
P2.2
P2.0
P2.1
OSCIN
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
40
39
38
37
PC.1/PWM60
PC.2/PWM61
PC.3/PWM62
PWMOTB/80
PWMOTB/81
PWMOTB/82
P3.0
P3.1
P3.2
P3.3
P1.0
P1.1
P1.2
P1.3
VBLNKPAD
VBPAD
P6.1/VGPAD
P6.0/VRPAD
VSYNCBP
HSYNCBP
General Register
- 8 x 4 bit x 4 Banks
Accumulator
- Bit Accumulator (CY), 4 bit Accumulator (A),
8 bit Accumulator (XA)
Multiple Vectored Interrupt Source
- External Interrupts : 4
- Internal Interrupts : 3
- Vsync Interrupts : 1
Watch timer
- fast mode : 3.91 msec
- normal mode : 0.5 sec
- buzzer output : 1, 2, 4 KHz
Basic interval timer
- 8 kinds of period
- Used stabilization wait timer to wake up
Stop mode
Two 8-bit timer / event counters
D
M
C
4
2
C
2
0
0
8
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
OSCOUT 20
DAEWOO [ DAEWOO SEMICONDUCTOR ]
