EM78468
8-BIT Microcontroller
Table 1 (b) Pin Description for Package of QFP44 and LQFP44
Pin Number I/O type Description
Pin
VDD
GND
18
I
* Power supply pin
15
I
* System ground pin
* In crystal mode: crystal input
* In RC mode: resistor pull high.
* In PLL mode: connect 0.01μF capacitance to GND
R-OSCI
16
I
* Connect 0.01μF capacitance to GND and code option
select PLL mode when high oscillator is not use.
* In crystal mode: crystal output
OSCO
Xin
17
19
O
I
* In RC mode: instruction clock output
* In crystal mode:Input pin for sub-oscillator. Connect to a
32.768KHz crystal
* RC mode: this pin is connected with a resistor to high level.
* In crystal: Connect to a 32.768KHz crystal
* In RC mode: instruction clock output
Xout
20
14
O
I
* Low active. If set as /RESET and remains at logic low, the
devices will be reset
/RESET
* General purpose I/O pin. /external interrupt.
* INT0 interruption source can be set to falling or rising edge
by IOC71 register bit 7 (INT_EDGE).
P5.4/INT0
P5.5/INT1
21
22
I/O
I/O
* Wake up from sleep mode and idle mode when the pin
status changes.
* General purpose I/O pin. /external interrupt.
* Interruption source is a falling edge signal.
* Wake up from sleep mode and idle mode when the pin
status changes.
* General purpose I/O/ external counter input
P5.6/TCC
23
24
I/O
I/O
* This pin works in normal/green/idle mode.
* General purpose I/O pin or IR/PWM mode output pin,
* Capable of sinking 18mA/5V.
P5.7/IROUT
* General purpose I/O pin.
P6.0
~
* Pull-high, pull-low and open drain function support.
* All pins can wake up from sleep and idle modes when the
pin status changes.
25~32
I/O
P6.7
COM3~0
6~9
5~2
1
O
O
* LCD common output pin.
* LCD segment output pin.
SEG11~SEG14
SEG16/P7.0
SEG17/P7.1
~
44
~
* LCD segment output pin. Can be shared with general
purposes I/O pin
O/(I/O)
SEG23/P7.7
38
* LCD segment output pin. Can be shared with general I/O
pin
SEG24/P8.0
~
37
~
O/(I/O)
* 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
SEG31/P8.4
33
VB
VA
VLCD2
VLCD3
10
11
12
13
O
O
O
O
* One of LCD bias voltage
8 •
Product Specification (V1.1) 04.11.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
