HD64F3028F25 Datasheet, PDF (483/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

13.1.2 Block Diagram
Figure 13.1 shows a block diagram of the SCI.
Module data bus
Internal data bus
RxD
TxD
SCK
RDR
RSR
TDR
SSR
BRR
SCR
TSR
SMR
SCMR
Transmit/receive
control
Baud rate
generator
Parity generate
Parity check
Clock
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
BRR : Bit rate register
SCMR : Smart card mode register
φ
φ/ 4
φ/16
φ/64
TEI
TXI
RXI
ERI
Figure 13.1 SCI Block Diagram
Rev. 2.00, 09/03, page 451 of 890