Samsung S3F80JB - Manual (Page 27)

S3F80JB PRODUCT OVERVIEW
1-9
Table 1-2. Pin Descriptions of 44-QFP (Continued)
Pin
Names
Pin
Type
Pin Description Circuit
Type
44 Pin
No.
Shared
Functions
P3.1
I/O I/O port with bit-programmable pin. Configurable to
input mode, push-pull output mode, or n-channel
open-drain output mode. Input mode with a pull-up
resistor can be assigned by software.
This port 3pin has high current drive capability.
Also P3.1 can be assigned individually as an
output pin for REM.
In the tool mode, P3.1 is assigned as serial MTP
interface pin; SCLK 4 4 REM
(SCLK)
P3.2–P3.3 I C-MOS Input port with a pull-up resistor 5 17
18 (T0CK)
(T1CAP/T2CAP)
P3.4–P3.5 I/O I/O port with bit-programmable pins. Configurable
to input mode or output mode. Pin circuits are
either push-pull or n-channel open-drain type. Pull-
up resistors can be assigned by software. 2 13–14 –
P4.0–P4.7 I/O I/O port with bit-programmable pins. Configurable
to input mode or output mode. Pin circuits are
either push-pull or n-channel open-drain type. 2 38–41
27–29
19
–
X
OUT
, X
IN
– System clock input and output pins – 7,8 –
nRESET I System reset signal input pin and back-up mode
input. 6 12 –
TEST I Test signal input pin
(for factory use only; must be connected to V
SS
.)
_ 9 _
V
DD
– Power supply input pin – 5 –
V
SS
– Ground pin – 6 –