GMS81508/16
1.5. PIN DESCRIPTION
Classification
No.
Symbol
I/O
Descriptions
Power
1
32
Vdd
Vss
I
I
I
Power Supply Input Pin(4.5~5.5V)
Ground(0V)
Controls Microprocess Mode of the Chip
At "H" input : Single Chip Mode
2
MP
At "L" input : Microprocess Mode
System Control
29
RESET
I
I
In the state of "L" level, system enter to the reset
state.
This chip has an internal clock generating circuit. To
control generating frequency, an external ceramic or
a quartz crystal oscillator is connected between Xin
and Xout pins.
If external clock is used, the clock source should be
connected to the Xin pin and the Xout pin should be
left open.
or
Clock
30
31
Xin
Xout
I
24
23
22
21
28
27
26
25
4
EC0
EC2
T1O
I
I
O
O
I
I
I
I
I
I
I
I
I
Event Counter Source Clock Input Pin
Timer
Timer Counter Overflow Output Pin
T3O
INT0
INT1
INT2
INT3
AVref
AVss
AN0
AN1
AN2
AN3
Ext. Interrupt
External Interrupt Request Signal Input Pin
Reference Voltage Input Pin for A/D Converter
Ground Level Input Pin for A/D Converter
3
12
11
10
9
A/D Converter
I
Analog Voltage Input Pin for A/D Converter
8
AN4
I
7
AN5
I
6
AN6
I
5
AN7
I
17
18
19
20
14
13
15
16
Srdy
Sclk
Sout
Sin
PWM0
PWM1
BUZ
WDTO
I/O
I/O
O
I
O
O
O
O
Receive Enable Output Pin
Serial Clock Output Pin
Serial Data Output Pin
Serial Data Input Pin
Serial I/O
P.W.M
PWM Pulse Output Pin
Buzzer
W.D.T
Buzzer Driving Frequency Output Pin
Watch dog Timer Overflow Output Pin
5
HYNIX [ HYNIX SEMICONDUCTOR ]
