EM78871BQ Ver la hoja de datos (PDF) - ELAN Microelectronics
Número de pieza
componentes Descripción
Fabricante
EM78871BQ Datasheet PDF : 59 Pages
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CMP1
CMP2
CMP3
CURRENT DA
DAOUT
I (PORT63)
I (PORT64)
I (PORT65)
O (PORT66)
IO
P55 ~P57
I/O
P60 ~P67
I/O
P70 ~ P77
I/O
P80 ~ P87
P90 ~ P97
PB0 ~ PB7
PC0 ~ PC7
INT0
INT1
INT2
TEST
/RESET
I/O
I/O
I/O
I/O
PORT70..73
PORT74..76
PORT77
I
I
EM78871
8-bit Micro-controller
Comparator input pins. Shared with PORT63, PORT64 and
PORT65.
Current DA output pin. It can be a control signal for sound
generating.
Shared with PORT66.
PORT 5 can be INPUT or OUTPUT port each bit.
PORT 6 can be INPUT or OUTPUT port each bit.
Internal pull high.
PORT 7 can be INPUT or OUTPUT port each bit.
Internal Pull high function.
Auto key scan function.
Interrupt function.
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.
Interrupt sources which has the same interrupt flag. Any pin from
PORT70 to PORT73 has a falling edge signal, it will generate a
interruption.
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.
Test pin into test mode for factory test only. Connect it ground in
application.
Low reset
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* This specification is subject to be changed without notice. 10
8/23/04 (V1.5)
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