H838024_10 Datasheet, PDF (357/684 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

10.1.2 Block Diagram
Figure 10.1 shows a block diagram of SCI3.
Section 10 Serial Communication Interface
External
SCK32 _{clock Baud rate generator}
Clock
BRC
Transmit/receive
control circuit
Internal clock (φ/64, φ/16, φ_W/2, φ)
BRR
SMR
SCR3
SSR
TXD₃₂
RXD₃₂
SPCR
TSR
RSR
TDR
RDR
[Legend]
RSR: Receive shift register
RDR: Receive data register
TSR: Transmit shift register
TDR: Transmit data register
SMR: Serial mode register
SCR3: Serial control register 3
SSR: Serial status register
BRR: Bit rate register
BRC: Bit rate counter
SPCR: Serial port control register
Figure 10.1 SCI3 Block Diagram
Interrupt request
(TEI, TXI, RXI, ERI)
Rev. 8.00 Mar. 09, 2010 Page 335 of 658
REJ09B0042-0800