EM78808
8-bit Micro-controller
SERIAL IO
SCK
IO (PORT60)
O (PORT61)
Master: output pin, Slave: input pin. This pin shared with
PORT60.
Output pin for serial data transferring. This pin shared with
PORT61.
SDO
SDI
I
(PORT62)
Input pin for receiving data. This pin shared with PORT62.
Comparator
CMP1
CMP2
I
I
I
(PORT63)
(PORT64)
(PORT65)
Comparator input pins. Shared with PORT63, PORT64 and
PORT65.
CMP3
CURRENT DA
DAOUT
O (PORT66)
Current DA output pin. It can be a control signal for sound
generating.
Shared with PORT66.
IO
P55 ~P57
P60 ~P67
I/O
I/O
PORT 5 can be INPUT or OUTPUT port each bit.
PORT 6 can be INPUT or OUTPUT port each bit.
Internal pull high.
P70 ~ P77
I/O
PORT 7 can be INPUT or OUTPUT port each bit.
Internal Pull high function.
Auto key scan function.
Interrupt function.
P80 ~ P87
P90 ~ P97
PB0 ~ PB7
PC0 ~ PC7
INT0
I/O
PORT 8 can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT 9 can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT B can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT C can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
I/O
I/O
I/O
PORT70..73
Interrupt sources which has the same interrupt flag. Any pin from
PORT70 to PORT73 has a falling edge signal, it will generate a
interruption.
INT1
INT2
PORT74..76
Interrupt sources which has the same interrupt flag. Any pin from
PORT74 to PORT76 has a falling edge signal, it will generate a
interruption.
Interrupt source. Once PORT77 has a falling edge or rising edge
signal (controlled by CONT register), it will generate a
interruption.
PORT77
I
TEST
Test pin into test mode for factory test only. Connect it ground in
application.
/RESET
I
I
Low reset
EDIN1
EGIN2
Differential Energy Detector input pin
It can detect external analog signal
______________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
8/1/2004 (V3.1)
11
ELAN [ ELAN MICROELECTRONICS CORP ]
