HD6433802H Datasheet, PDF (237/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

10.1.2 Block diagram
Figure 10.1 shows a block diagram of SCI3.
External
SCK32 _{clock Baud rate generator}
Clock
BRC
Transmit/receive
control circuit
Internal clock (ø/64, ø/16, øw/2, ø)
BRR
SMR
SCR3
SSR
TXD
RXD
SPCR
TSR
RSR
TDR
RDR
Notation:
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)
219