Block Diagram - Renesas H8S/2319 series Hardware Manual

12.1.2

Block Diagram

Figure 12-1 shows a block diagram of the SCI.
RDR
RxD
RSR
TxD
SCK
Legend:
SCMR : Smart card mode register
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
SCMR
SSR
SCR
TSR
SMR
Transmission/
reception control
Parity generation
Parity check
Figure 12-1 Block Diagram of SCI
BRR
Baud rate
generator
Clock
External clock
Rev. 5.00, 12/03, page 423 of 1088
Internal
data bus
φ
φ/4
φ/16
φ/64
TEI
TXI
RXI
ERI