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11.1.2 Block Diagram
Figure 11-1 shows a block diagram of the SCI.
RDR
RxD
RSR
TxD
SCK
Legend
RSR:
Receive shift register
RDR:
Receive data register
TSR:
Transmit shift register
TDR:
Transmit data register
SMR:
Serial mode register
SCR:
Serial control register
SSR:
Serial status register
BRR:
Bit rate register
Module data bus
TDR
SSR
SCR
SMR
TSR
Transmit/
receive control
Parity generate
Clock
Parity check
External clock
Figure 11-1 SCI Block Diagram
313
Internal
data bus
BRR
ø
Baud rate
ø/4
generator
ø/16
ø/64
TEI
TXI
RXI
ERI
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