GMS81508A Datasheet, PDF (10/91 Pages) Hynix Semiconductor – USERS MANUAL

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