S3C72N2 Datasheet, PDF (5/29 Pages) Samsung semiconductor – The S3C72N2/C72N4 single-chip CMOS microcontroller has been designed for high performance using Samsungs newest 4-bit CPU core, SAM47 (Samsung Arrange

S3C72N2/C72N4/P72N4
PRODUCT OVERVIEW
PIN DESCRIPTIONS
Pin Name
P1.0
P1.1
P1.2
P1.3
P2.0
P2.1
P2.2
P2.3
P3.0
P3.1
P3.2
P3.3
P6.0–P6.3
P8.0–P8.7
SEG0–SEG23
SEG24–SEG31
COM0–COM3
V_LC0–V_LC2
BIAS
LCDCK
Table 1-1. S3C72N2/C72N4 Pin Descriptions
Pin
Type
Description
I 4-bit input port.
1-bit or 4-bit read and test is possible.
4-bit pull-up resistors are software
assignable.
I/O 4-bit I/O port.
1-bit and 4-bit read/write and test is
possible.
4-bit pull-up resistors are software
assignable.
I/O 4-bit I/O port.
1-bit and 4-bit read/write and test is
possible.
Each individual pin can be specified as
input or output. 4-bit pull-up resistors are
software assignable.
I/O 4-bit I/O ports. Pins are individually
software configurable as input or output.
1-bit and 4-bit read/write and test is
possible. 4-bit pull-up resistors are
software assignable.
O Output port for 1-bit data (for use as
CMOS driver only)
O LCD segment signal output
O LCD segment signal output
O LCD common signal output
– LCD power supply.
Built-in voltage dividing resistors
– LCD power control
I/O LCD clock output for display expansion
Number
17
18
19
20
21
22
23
24
25
26
27
28
29–32
40–33
64–41
40–33
1–4
6–8
5
25
Share
Pin
INT0
INT1
INT2
TCL0
TCLO0
–
CLO
BUZ
Reset
Value
Input
Circuit
Type
A-4
Input
D
LCDCK Input
D
LCDSY
KS0–KS3 Input
D
SEG24– Output H-1
SEG31
–
Output H
P8.0–P8.7 Output H-1
–
Output H
–
–
–
–
–
–
P3.0
Input
D
1-5