Samsung SCX-6345N/XAA Service Manual page 38

3.2.11 SCF PBA
Descriptions
A SCF PBA is a option cassette controlling in SCX-6345N. Max. 3 cassettes are connected on a purpose of feeding
paper. It consists one controller(S3F443FX) and two motor drive IC to control feeding timing through Uart communication
with a Main controller.
No. No. Signal Name Signal Name
1 1 24V 24V
2 2 3.3V 3.3V
3 3 GND GND
4 4 TxD TxD
5 5 RxD RxD
6 6 nBUSY nBUSY
7 7 nCMDREQ nCMDREQ
8 8 Reserved1 Reserved1
9 9 Reserved2 Reserved2
Samsung Electronics
Direction Direction Active Level Active Level
POWER POWER - -
POWER POWER - -
POWER POWER - -
OUT OUT - -
IN IN - -
OUT OUT LOW LOW
OUT OUT LOW LOW
I/O I/O LOW LOW
I/O I/O LOW LOW
System Overview
Description Description
+24V Power +24V Power
+3.3V Power +3.3V Power
Signal Ground Signal Ground
Data Transmission Data Transmission
Data Receive Data Receive
SCF TxD Line Busy SCF TxD Line Busy
Command Request Command Request
Reserved Reserved
Reserved Reserved
Service Manual
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