EM78910/910A
8-bit Micro-controller
ADDRESS
REGISTER
CONTROL REGISTER
(PAGE0)
CONTROL REGISTER
(PAGE1)
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
R0
R1(TCC)
R2(PC)
R3(STATUS)
page0
R4(RSR)
R5(PORT5,ROM PAGE)
R6(PORT6)
IOC5
IOC6
R7(PORT7)
IOC7
R8(general purpose register)
R9(PORT9)
IOC8 = 00000000
IOC9
page1
RA(CLK,FSK)
RB(DTMF)
IOCA
IOCB = 00000000
IOCC = 00000000
IOCD(PULL HIGH)
IOCE = 00000000
IOCF(INT CONTROL)
IOCB(COUNTER1)
IOCC(COUNTER2)
IOCD(R-OPTION)
RC(1.0K RAM ADDRESS)
RD(1.0K RAM DATA)
RE(WDT)
RF(INT FLAG)
10
:
16 X8
COMMON
REGISTER
RC(ADDRESS) RD(DATA)
1F
0
BANK0 ~BANK3
32X8 ~32X8
REGISTER
20
:
BANK3 BANK4
BANK1 BANK2
256X8 256X8
:
256X8 256X8
3F
255
Fig.5 Data memory configuration
4. R3 (CW and SDT output, CPU power control, Register page selection, Status flags)
7
6
5
4
3
2
1
0
CAS PAGE /SDT
* Bit 0 (C) : Carry flag
T
P
Z
DC
C
* 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
T
P
REMARK
WDT wake up from sleep mode
WDT time out (not sleep mode
/RESET wake up from sleep
power up
0
0
1
1
x
0
1
0
1
Low pulse on /RESET
X
X : don't care
* Bit 5 (/SDT) : (Read Only) Stuttered dial tone signal detection output, 0/1 => SDT signal valid/SDT signal
invalid
* Bit 6 (PAGE) : Change IOCB ~ IOCE to another page, 0/1 ! PAGE0/PAGE1
* Bit 7 (CAS) : (Read Only) Call waiting signal detection output, 0/1 ! CW signal valid/signal invalid
5. R4 (RAM address selection)
* Bits 0 ~ 5 are used to select up to 64 registers in the indirect addressing mode.
* Bits 6 ~ 7 determine which bank is activated among the 4 banks.
* See the configuration of the data memory in Fig.5.
6. R5 (PORT5(7:4) I/O registers, Program page selection)
7
6
5
4
3
2
1
0
R57
R56
R55
R54
PS3
PS2
PS1
PS0
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
~ ~
2001/01/12
6
ELAN [ ELAN MICROELECTRONICS CORP ]
