EM78860
8-BIT MICRO-CONTROLLER
XIN
XOUT
WDT Timer
Prescaler
R2
Oscillator/Timing
Control
ROM
Stack
R1(TCC)
Interrupt
Controller
Instruction
register
GENERAL
RAM
ALU
RAM
R4
Control of
sleep and
Instruction
Decoder
R3
R5
wake-up
on I/O ports
ACC
DATA & CONTROL BUS
2.5K RAM
PORT6
R6
P60~P67
PORT7
R7
P70~P77
PORT8
R8
P80~P87
PORT9
R9
P90~P97
IOC6
IOC7
IOC8
IOC9
PIN DESCRIPTIONS
Symbol
VDD
GND
Type
Function
POWER
POWER
Power
Gound
XTin
XTout
PLLC
I
O
I
Input pin for 32.768 kHz oscillator
Output pin for 32.768 kHz oscillator
Phase loop lock capacitor, connect a capacitor 0.01µ to 0.047µ with GND
COM0..COM7
O
Common driver pins of LCD drivers
COM8..COM15 O (PORT6)
SEG0..SEG43
Segment driver pins of LCD drivers
SEG44..SEG51 O (PORT8)
SEG52..SEG59 O (PORT9) PORT9 AS FUNCTION KEY CAN WAKE UP WATCHDOG.
INT0
INT1
INT2
INT3
PORT7(0)
PORT7(1)
PORT7(2)
PORT7(3)
PORT7
PORT7(0)~PORT7(3) signal can be interrupt signals.
P7.0~P7.7
PORT 7 can be INPUT or OUTPUT port each bit.
Internal Pull high function.
Key scan function.
Bit6,7 open drain function.
P6.0~P6.7
P8.0~P8.7
P9.0~P9.7
PORT6
PORT8
PORT9
PORT 6 can be INPUT or OUTPUT port each bit.
And shared with Common signal.
PORT 8 can be INPUT or OUTPUT port each bit.
And shared with Common signal.
PORT 9 can be INPUT or OUTPUT port each bit.
And shared with Common signal.
TEST
RESET
I
I
Test pin into test mode , normal low
* This specification are subject to be changed without notice.
6.24.1998
3
ELAN [ ELAN MICROELECTRONICS CORP ]
