5
4Bit Single Chip Microcontroller
DMC42C1008
I/O ADDRESS MAP
ADDRESS
b3
318H
319H
31AH
31BH
31CH
31DH
320H
321H
322H
323H
324H
325H
332H
334H
335H
336H
337H
390H
391H
392H
3A0H
Hardware Module Name
b2
b1
b0
R/W
R/W
SP1
SP5
IS1
Z
OV
SP0
SP4
IS0
T
W
320H.3
O
R/W
R/W
R/W
O
O
R/W
Addressing Unit
1 bit
4 bit
8bit
O
O
O
O
O
Stack pointer low
stack pointer high
Stack Page Select Low (SPSL)
Stack Page Select High (SPSh)
Psw low (PSWL)
Psw high (PSWH)
Clock source select. counter
start (ch0)
R
readable count value (ch0)
00
REMARKS
INITIAL
VALUE
E
F
0
0
0
0
00
Stack pointer low (SPL)
Stack pointer high (SPH)
SP3
-
AC
CY
SP2
-
T/E counter mode register 0
(TMOD0)
T/E counter register 0
(TMCNT0)
T/E reference register 0
(TMREF0)
Basic Timer mode register(BMOD)
Basic interval timer count
register(BITCNT)
Watch timer mode register
(WMOD)
Lcd display mode register
(LCDMD)
Lcd control register (LCON)
Power control register
(PCON)
W
count reference register (ch0)
FF
R/W
R
332H.3
clock select, Bit start
readable count register
0
00
R/W
336H.3
clock/buzzer select. bit3
readable
00
W
O
duty/bias/clock/seg/bitport
select
00
W
O
O
display ON/OFF
system clock select, idle, stop
mode
0
00
R/W
R/W
W
O
O
3A2H
3A4H
Operating mode register (SCMOD)
Clock output mode register
(CLOMD)
main/sub system clock select
cpu clock output select, clock
out EN/DIS
0
00
3A8H
3A9H
3AAH
3ABH
3B2H
3C2H
3C3H
3C4H
Serial interface mode register0
(SIOM0)
Serial interface buffer0
(SBUFF0)
Power on flag (PONF)
IME
IPSR3
IPSR2
IPSR1
IPSR0
W
3A8H.3
O
receive/transmit mode. clock
select
00
R/W
serial shift register 0
XX
P/W
R/W
3B2H.0
3C2H.3
O
O
power on reset flag
Interrupt priorty select, IME flag.
0
00
External interrupt mode register0
(IMOD0)
W
O
external interrupt 0 edge
detection
00
3C5H
External interrupt mode register1
(IMOD1)
W
O
external interrupt 1 edge
detection
00
3C6H
External interrupt mode register2
(IMOD2)
W
O
external interrupt 2 edge
detection
00
3C7H
External interrupt mode register3
(IMOD3)
W
O
external interrupt 3 edge
detection
00
3D8H
3D9H
IE2
IRQ2
IEBT
IEWT
IRQBT
IRQWT
R/W
R/W
O
O
O
O
Interrupt EN/IRQ flag
Interrupt EN/IRQ flag
0
0
DAEWOO [ DAEWOO SEMICONDUCTOR ]
