Справочник Пользователя для IBM MiEM78P468L
EM78P468N/EM78P468L
8-Bit Microcontroller
Product Specification (V1.5) 02.15.2007
• 5
(This specification is subject to change without further notice)
Table 2 (b) Pin Description for Package of QFP44 and LQFP44
Symbol
Pin No.
Type
Function
P5.4/INT0 21
I/O
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.
IOC71 register Bit 7 (INT_EDGE).
Wakes up from sleep mode and idle mode when the pin status
changes.
P5.5/INT1 22
I/O
1-bit General purpose input/output pin/external interrupt.
The Interrupt source is a falling edge signal.
The Interrupt source is a falling edge signal.
Wakes up from sleep mode and idle mode when the pin status
changes.
changes.
P5.6/TCC 23
I/O
1-bit General purpose input/output pin/external counter input.
This pin works in normal/green/idle mode.
This pin works in normal/green/idle mode.
P5.7/IROUT 24 I/O
1-bit General purpose input/output pin/IR/PWM mode output pin
This pin is capable of sinking 20mA/5V.
This pin is capable of sinking 20mA/5V.
P6.0~P6.7 25~32
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.
status changes.
COM3~0 6~9
O
LCD common output pin.
SEG11~SEG14 5~2
O LCD segment output pin.
SEG16/P7.0
SEG17/P7.1
SEG17/P7.1
~
SEG23/P7.7
1
44
~
38
O/(I/O)
LCD segment output pin.
Can be shared with general purpose I/O pin
Can be shared with general purpose I/O pin
SEG24/P8.0
~
SEG31/P8.4
37
~
33
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 purposes I/O use, supports pull-high function.
idle mode when the pin status changes.
For general purposes I/O use, supports pull-high function.
VB 10
O
Connect capacitors for LCD bias voltage.
VA 11
O
Connect capacitors for LCD bias voltage.
VLCD2 12
O
One of LCD bias voltage.
VLCD3 13
O
One of LCD bias voltage.
/RESET 14
I
General-purpose Input only
Low active. If it remains at logic low, the device will be reset.
Low active. If it remains at logic low, the device will be reset.
R-OSCI 16
I
In Crystal mode: crystal input
In RC mode: resistor pull high.
In PLL mode: connect 0.01
In RC mode: resistor pull high.
In PLL mode: connect 0.01
μF capacitance to GND
Connect 0.01
μF capacitor to GND and code option select PLL
mode when high oscillator is not use
OSCO 17
O
In Crystal mode: crystal input
In RC mode: instruction clock output
In RC mode: instruction clock output
Xin 19
I
In Crystal mode: Input pin for sub-oscillator. Connect to a
32.768kHz crystal.
32.768kHz crystal.
Xout 20
o
In Crystal mode: Connect to a 32.768kHz crystal.
In RC mode: instruction clock output
In RC mode: instruction clock output
VDD 18
I
Power supply
GND 15
I
System ground pin