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EM78P468N/EM78P468L
8-Bit Microcontroller
4 •
Product Specification (V1.5) 02.15.2007
(This specification is subject to change without further notice)
5 Pin Description
Table 1 (a) Pin Description for Package of QFP64 and LQFP64
Symbol Pin No. Type Function
P5.4/INT0 32 I/O
1-bit General purpose input/output pin/external interrupt.
INT0 interrupt source can be set to falling or rising edge by IOC71
register Bit 7 (INT_EDGE).
Wakes up from sleep mode and idle mode when the pin status
changes.
P5.5/INT1 33 I/O
1-bit General purpose input/output pin/external interrupt.
Interrupt source is a falling edge signal.
Wakes up from sleep mode and idle mode when the pin status
changes.
P5.6/TCC 34 I/O
1-bit General purpose input/output pin/external counter input.
This pin works in normal/green/idle mode.
P5.7/IROUT 37 I/O
1-bit General purpose input/output pin/IR/PWM mode output pin.
This pin is capable of sinking 20mA/5V.
P6.0~P6.7 38~45 I/O
8-bit General purpose input/output pins.
Pull-high, pull-low and open drain function supported.
All pins can wake up from sleep and idle modes when the pin
status changes
COM3~0 17~20 O
LCD common output pin.
SEG0~SEG15 16~1 O
LCD segment output pin.
SEG16/P7.0
~
SEG23/P7.7
64
~
57
O/(I/O)
LCD segment output pin.
Can be shared with general purpose I/O pin
SEG24/P8.0
~
SEG30/P8.6
SEG31/P8.7
56
~
50
46
O/(I/O)
LCD segment output pin. Can be shared with general I/O pin.
For general purpose I/O use, can wake up from sleep mode and
idle mode when the pin status changes.
For general purpose I/O use, supports pull-high function.
VB 21 O
Connect capacitors for LCD bias voltage.
VA 22 O
Connect capacitors for LCD bias voltage.
VLCD2 23 O
One of LCD bias voltage.
VLCD3 24 O
One of LCD bias voltage.
/RESET 25 I
General-purpose Input only
Low active. If it remains at logic low, the device will be reset.
R-OSCI 27 I
In Crystal mode: crystal input
In RC mode: resistor pull high.
In PLL mode: connect 0.01μF capacitance to GND
Connect 0.01μF capacitor to GND and code option select PLL
mode when high oscillator is not use
OSCO 28 O
In Crystal mode: crystal input
In RC mode: instruction clock output
Xin 30 I
In Crystal mode: Input pin for sub-oscillator. Connect to a
32.768kHz crystal.
Xout 31 o
In Crystal mode: Connect to a 32.768kHz crystal.
In RC mode: instruction clock output
NC
35~36
47~49
−
No connection
VDD 29 I
Power supply
GND 26 I
System ground pin