HD64F2149 Datasheet, PDF (445/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

15.1.2 Block Diagram
Figure 15.1 shows a block diagram of the SCI.
Module data bus
RxD
TxD
SCK
RDR
RSR
TDR
SCMR
BRR
SSR
TSR
SCR
SMR
Baud rate
generator
Transmission/
reception control
Parity generation
Clock
Parity check
External clock
Legend:
RSR:
RDR:
TSR:
TDR:
SMR:
SCR:
SSR:
SCMR:
BRR:
Receive shift register
Receive data register
Transmit shift register
Transmit data register
Serial mode register
Serial control register
Serial status register
Serial interface mode register
Bit rate register
Figure 15.1 Block Diagram of SCI
ø
ø/4
ø/16
ø/64
TEI
TXI
RXI
ERI
Internal
data bus
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