Samsung KS57C2308 Manual page 6

PRODUCT OVERVIEW
Pin Name Pin
Type
LCDSY I/O LCD synchronization clock output for LCD
display expansion
TCL0 I/O External clock input for timer/counter 0
TCLO0 I/O Timer/counter 0 clock output
SI I Serial interface data input
SO I/O Serial interface data output
I/O Serial I/O interface clock signal
SCK
INT0 I External interrupts. The triggering edge for
INT1 INT0 and INT1 is selectable. Only INT0 is
synchronized with the system clock.
INT2 I Quasi-interrupt with detection of rising edge
signals.
INT4 I External interrupt input with detection of rising
or falling edge
KS0–KS7 I/O Quasi-interrupt inputs with falling edge
detection.
CLO I/O CPU clock output
BUZ I/O 2, 4, 8 or 16 kHz frequency output for buzzer
sound with 4.19 MHz main system clock or
32.768 kHz subsystem clock.
X
– Crystal, ceramic or RC oscillator pins for main
IN,
system clock. (For external clock input, use
X
OUT
X
XT
– Crystal oscillator pins for subsystem clock.
IN,
(For external clock input, use XT
XT
OUT
XT
V
– Main power supply
DD
V
– Ground
SS
– Reset signal
RESET
Test signal input (must be connected to V
TEST –
NOTES:
1. Pull-up resistors for all I/O ports are automatically disabled if they are configured to output mode.
*
2. D Type has a schmitt trigger circuit at input.
6
1-
Table 1-1. KS57C2308/C2316 Pin Descriptions (Continued)
Description
and input X 's reverse phase to X
IN IN
's reverse phase to XT
IN
Number
)
OUT
and input
IN
)
OUT
)
SS
KS57C2308/P2308/C2316/P2316
Share
Pin
33 P3.1
27 P1.3
28 P2.0
23 P0.3
22 P0.2
21 P0.1
24 P1.0
25 P1.1
26 P1.2
20 P0.0
44–51 P6.0–P7.3
30 P2.2
31 P2.3
15,14 –
17,18 –
12 –
13 –
19 –
16 –
Reset Circuit
Value Type
Input D
Input A-1
Input D
Input A-1
*
Input
D
*
Input
D
Input A-1
Input A-1
Input A-1
*
Input
D
Input D
Input D
– –
– –
– –
– –
Input B
– –