EM78869 Datasheet, PDF (7/38 Pages) ELAN Microelectronics Corp – 8-Bit RISC Type Microprocessor

EM78869
8-Bit RISC Type Microprocessor
4.1 Pin Description
PIN
VDD
GND
OSCI
PIN
Number
4
54
2
OSCO
COM0 ~ COM8
SEG20 ~ SEG59
/RESET
3
13 ~ 5
14 ~ 53
64
PLLC
/INT0~/INT3
P5.4 ~ P5.7
1
56 ~ 59
34 ~ 37
P6.0
5
P7.0 ~ P7.7
56~63
P8.0 ~ P8.7
P9.0 ~ P9.7
TEST
38~45
46~53
55
I/O type
I
I
I
O
O
O
I
I
I
I/O
I/O
I/O
I/O
I/O
I
Description
Power supply pin
System ground pin
In crystal mode: crystal input
In RC mode: resistor pull high.
RC or crystal selection thru OSCSEL bit of code option
In crystal mode: crystal output
Common driver pins of LCD driver
Segment driver pins of LCD driver
Low active. If set as /RESET and remains at logic low,
the devices will be reset
Phase loop lock capacitor. Connect a capacitor 0.01µ
to 0.047µ with GND.
Signal can be interrupt signals
Port 5 (INPUT or OUTPUT port per bit).
Shared with LCD segment signals
Port 6 (INPUT or OUTPUT port per bit).
Shared with LCD common signals
Port 7 (INPUT or OUTPUT port per bit).
Internal Pull high function.
Key scan function.
General purpose I/O pin.
Port 8 (INPUT or OUTPUT port per bit).
Shared with LCD segment signals
Port 9 (INPUT or OUTPUT port per bit).
“And” can be set as wake-up watchdog timer.
“And” is shared with Segment signal.
Test pin during test mode only. Normally low
Table 1 Pin Arrangement
This specification is subject to change without further notice.
07.12.2004 (V1.0) 3 of 34