EM78910 Ver la hoja de datos (PDF) - ELAN Microelectronics
Número de pieza
componentes Descripción
Fabricante
EM78910 Datasheet PDF : 30 Pages
| |||
EM78910/910A
8-bit Micro-controller
* Bit 6~7 = 0 : unused
7. IOCB (Preset and readout for COUNTER1)
PAGE0 (unused)
It is unused and always “00000000”.
PAGE1 (COUNTER1 preset and readout)
It is 8 bit up-counter (COUNTER1) preset and read out register. (write = preset) After an interruption, it
will count from “00”.
8. IOCC (Preset and readout for COUNTER2)
PAGE0 (unused)
It is unused and always “00000000”.
PAGE1 (COUNTER2 preset and readout)
It is 8 bit up-counter (COUNTER2) preset and read out register. (write = preset) After an interruption, it
will count from “00”.
9. IOCD (Internal pull-high control for PORT7, R-option control for PORT9)
PAGE0 (Internal pull-high control for P77~P70 pins)
7
6
5
4
3
2
1
0
PH7 PH6 PH5 PH4 PH3 PH2 PH1 PH0
* Bit 7~0 (PH7~PH0) : PORT7’s internal pull-high control for P77~P70 pins, 1/0 ! enable/disable
PAGE1 (R-option control for P97~P90)
7
6
5
4
3
2
1
0
RO7 RO6 RO5 RO4 RO3 RO2 RO1 RO0
* Bit 7~0 (RO7~RO0) : R-option control bits for P97~P90 pins, 1/0 ! enable /disable
RO is used for R-option. Setting RO to ‘1’ will enable the status of R-option pin (P90 ~ P97) to read by
controller. Clearing RO will disable R-option function. If the R-option function is used, user must connect
PORT9 pins to GND by 560K external register. If the register is connected/disconnected, the R9 will read as
“ 0/1” when RO is set to ‘1’.
10. IOCE (PORT7’s P77 switch, COUNTER1 and COUNTER2 source, COUNTER1’s prescaler, FSK output
data type)
PAGE0 (PORT7’s P77 switch)
7
6
5
4
3
2
1
0
0
0
0
0
0
0 LBD/P77 0
* Bit 0 = 0 : unused
* Bit 1 (LBD/P77) : PORT7’s P77 switch, 0/1 ! low battery detect input/ normal IO port P77
* Bit 2~7 = 0 : unused
PAGE1 (P77’s and P76’s open-drain control, COUNTER1 and COUNTER2 source, COUNTER1’s prescaler,
FSK output data type)
7
6
5
4
3
2
1
0
OP77 OP76 C2S C1S PSC1 PSC0 CDRD 0
* Bit 0 = 0 : unused
* Bit 1 (CDRD) : FSK output data type selection bit, 0/1 ! FSK cooked data/FSK raw data
* Bit 3,2 (PSC1,PSC0) : COUNTER1’s prescaler, reset = (0,0)
(PSC1,PSC0) = (0,0) ! 1:1, (0,1) ! 1:4, (1,0)! 1:8, (1,1) ! reserved
* Bit 4 : COUNTER1 source, 0/1 ! 32.768KHz/3.579MHz if enable
* Bit 5 : COUNTER2 source, 0/1 ! 32.768KHz/3.579MHz if enable prescale=1:1
* Bit 6 : P76’s open-drain control, 0/1 ! disable/enable
* Bit 7 : P77’s open-drain control, 0/1 ! disable/enable
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
~ 12~
2001/01/12
Share Link: 