EM78911
8-bit micro-controller
micro-
ADDRESS
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
:
1F
20
:
3F
REGISTER
R0
R1(TCC)
R2(PC)
R3(STATUS)
R4(RSR)
R5(ROM PAGE & R5)
R6(PORT6)
R7(PORT7)
R8(PORT8)
R9(PORT9)
RA(CLK,FSK)
RB(DTMF)
RC(2.5K RAM ADDRESS)
RD(2.5K RAM DATA)
RE(WDT)
RF(INT FLAG)
16X8
COMMON
REGISTER
BANK0 ~BANK3
32X8 ~32X8
REGISTER
CONTROL REGISTER
(PAGE0)
CONTROL REGISTER
(PAGE1)
page0
IOC6
IOC7
IOC8
IOC9
IOCA
IOCB(LCD ADDRESS)
IOCC(LCD DATA)
IOCD(PULL HIGH)
IOCE(IO, LCD)
IOCF(INT CONTROL)
page1
IOCB(COUNTER1)
IOCC(COUNTER2)
IOCD(R-OPTION)
RC(ADDRESS) RD(DATA)
0
BANK1 BANK2 …………..BANK10
:
256X8 256X8 …………….256X8
255
Fig.5
Data memory configuration
4. R3 (Status Register)
7
6
5
4
3
2
1
0
CAS
PAGE
-
T
P
Z
DC
C
* Bit 0 (C) Carry flag
* Bit 1 (DC) Auxiliary carry flag
* Bit 2 (Z) Zero flag
* Bit 3 (P) Power down bit. Set to 1 during power on or by a "WDTC" command and reset to 0 by a "SLEP"
command.
* Bit 4 (T) Time-out bit. Set to 1 by the "SLEP" and "WDTC" command, or during power up and reset to 0 by
WDT timeout.
EVENT
WDT wake up from
sleep mode
WDT time out (not sleep mode)
/RESET wake up from sleep
power up
Low pulse on /RESET
T
0
0
1
1
x
P
0
1
0
1
x
x .. don't care
REMARK
* Bit 5 unused
* Bit 6 PAGE : change IOCB ~ IOCE to another page , 0/1 => page0 / page1
* Bit7 (CAS : CALL WAITING Output)
0/1= CW data valid/No data
6
EMC [ ELAN MICROELECTRONICS CORP ]
