HD6473887 Datasheet, PDF (285/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

2. Block diagram
Figure 10-6 shows a block diagram of SCI3.
SCK 3x
External
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:
RDR:
TSR:
TDR:
SMR:
SCR3:
SSR:
BRR:
BRC:
SPCR:
Receive shift register
Receive data register
Transmit shift register
Transmit data register
Serial mode register
Serial control register 3
Serial status register
Bit rate register
Bit rate counter
Serial port control register
Figure 10-6 SCI3 Block Diagram
Interrupt request
(TEI, TXI, RXI, ERI)
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