em78p468n ELAN Microelectronics Corp, em78p468n Datasheet - Page 11

• Manufacturer Part Number: em78p468n
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.6) 12.31.2007
(This specification is subject to change without further notice)
Table 2 (b) Pin Description for Package of QFP44 and LQFP44
P5.4/INT0
P5.5/INT1
P5.6/TCC
P5.7/IROUT
P6.0~P6.7
COM3~0
SEG11~SEG14
SEG16/P7.0
SEG17/P7.1
SEG23/P7.7
SEG24/P8.0
SEG31/P8.4
VB
VA
VLCD2
VLCD3
/RESET
R-OSCI
OSCO
Xin
Xout
VDD
GND
Symbol
~
~
Pin No.
25~32
6~9
5~2
21
22
23
24
44
38
37
33
10
11
12
13
14
16
17
19
20
18
15
1
~
~
O/(I/O)
O/(I/O)
Type
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
O
O
o
I
I
I
I
I
1-bit General purpose input/output pin/external interrupt.
The 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.
1-bit General purpose input/output pin/external interrupt.
The Interrupt source is a falling edge signal.
Wakes up from sleep mode and idle mode when the pin status
changes.
1-bit General purpose input/output pin/external counter input.
This pin works in normal/green/idle mode.
1-bit General purpose input/output pin/IR/PWM mode output pin
This pin is capable of sinking 20mA/5V.
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.
LCD common output pin.
LCD segment output pin.
LCD segment output pin.
Can be shared with general purpose I/O pin
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 purposes I/O use, supports pull-high function.
Connect capacitors for LCD bias voltage.
Connect capacitors for LCD bias voltage.
One of LCD bias voltage.
One of LCD bias voltage.
General-purpose Input only
Low active. If it remains at logic low, the device will be reset.
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
In Crystal mode: crystal input
In RC mode: instruction clock output
In Crystal mode: Input pin for sub-oscillator. Connect to a
32.768kHz crystal.
In Crystal mode: Connect to a 32.768kHz crystal.
In RC mode: instruction clock output
Power supply
System ground pin
Function
8-Bit Microcontroller
EM78P468N/L
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