HD6432633 Datasheet, PDF (747/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

16.1.2 Block Diagram
Figure 16-1 shows a block diagram of the SCI.
Module data bus
RxD
TxD
SCK
RDR
RSR
TDR
SCMR
BRR
SSR
TSR
SCR
SMR
Transmission/
reception control
Baud rate
generator
Parity generation
Clock
Parity check
External clock
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
SCMR : Smart card mode register
BRR : Bit rate register
Figure 16-1 Block Diagram of SCI
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TEI
TXI
RXI
ERI
Internal
data bus
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