ST20P16
5. PAD DESCRIPTION
Pin No.
12~9
8~1
SEG4 ~ SEG23
68 ~ 57
56~49
48~41
39~36
35~32
24
29
16
SEG24/PC0 ~
SEG31/PC7
SEG32/PB0 ~
SEG39/PB7
COM 0 – 3
COM 4 - 7
RESET
GND
PA0/INTX
O
I/O
O
I/O
O
O
O
I
P
I/O
I
I
I
I/O
I
O
P
I
I
O
I
I
P
-
P
I
LCD Segment output
Port-C bit programmable I/O
LCD Segment output
Port-B bit programmable I/O
LCD Common output
LCD Common output
Output port
Pad reset input (HIGH Active)
Ground Input and chip substrate
Port-A bit programmable I/O
Edge-trigger Interrupt.
Transition-trigger Interrupt
Programmable Timer1 clock source
Port-A bit programmable I/O
Transition-trigger Interrupt
PSG/DAC Output
Power supply
OSC input pin. For 32768Hz crystal
Port-D input
OSC output pin. For 32768Hz crystal
Port-D input
OSC input pin. Toward to external
resistor
OTP programming power
-
OTP programming power
Power on timer control pin.
Suggest tie to GND to disable
O
LCD Segment output
Designation
SEG0/PA4 ~
SEG3/PA7
Type
O
I/O
Description
LCD Segment output
Port-A bit programmable I/O
15~9
28~27
26
22
21
25
17~18
19,20,31,40
23
30
PA 1-7
PSGO,PSGOB
VDD
OSCXI/PD0
OSCXO/PD1
OSCI
PE2~PE3
NC
VPP
PWRT
Legend: I = input, O = output, I/O = input/output, P = power.
Ver 1.5
4/10
6/13/07
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
