Xerox WorkCentre 385 Service Manual page 143

SERIAL COMMUNICATION PART
UART (Universal Asynchronous
Transmitter) at KS32C6100 enables the main and
LIU, main and OPE to transmit serial data. The
block diagram of UART is as follows:
KS32C6100 has two UART channels. The baud
rate is 9600bps.
WorkCentre 385
CPU BUS
Receiver/
LCONO
SPCONO
Baud Gen(8x)
Tx/Rx Control
IRQ control
SSRO
BRDRO
internal
Resister
TXD: START
RXD: START
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UartIRQ
RE
(UARTData)
TxHoldingReg
(UARTData)
RxBufferReg
IR Tx
Encoder
FIG. 7-2: UART BLOCK DIAGRAM
DO D1 D2 D3 D4
DO D1 D2 D3 D4
FIG. 7-3: UART DATA FORMAT
12/98
7 - 9
IRS
0
1
0
1
IR Rx
Decoder
D5 D6 D7 STOP
D5 D6 D7 STOP
Circuit Description
TXD
RXD