Samsung RCD-750 - Page 20

Pin Name
SEGO - SEG23
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Pin
Input/
Output
| Pin Description
Output
SEG24 - SEG31
P8.0 - P8.7
Output
COMO - COM3 Output
VLCo - VLC2
TCL
TCLO
INT1
CLO
-
BUZ
Xin, Xout
P2.0
P2.2
P2.3
Reset
1/0 CKT
| LCD segment display signal output.
Low Level
Condition Type |
LCD segment display signa! output.
LCD common signal output.
LCD power supply. Voltage dividing internal
resistors can be provided by mask option.
LCD power control.
aa |
Low Level
Low Level
Low Level
Low Level
LCD clock output for display expansion.
eae _| D-A
LCD synchronization clock output for LCD display
expansion.
Input
p-a |
1/0
1/0
Timer/counter external clock input.
Timer/counter clock output.
External interrupt input.
Triggering edge selectable.
Quasi-interrupt input for external rising edge
detection.
KSO
-
KS3
P6.0
-
P6.3
1/0
D-B
Quasi-interrupt input for external falling edge
detection.
Clock output.
| 2 KHz or 4 KHz clock output pin for buzzer sound.
Input
Input
| Crystal clock I/O pins for sub-system clock.
Crystal/ceramic/ RC clock I/O for main-system
clock.
XTin, XTout —
RESET — Input | RESET input (Active low).
VbD
_
Power
supply.
Vss = Ground.
NC _ No connection : must be connected to Vss
ail
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RCD-750