SH7604 Datasheet, PDF (350/633 Pages) Hitachi Semiconductor – Hardware Manual

13.1.2 Block Diagram
Figure 13.1 shows a block diagram of the SCI.
Module data bus
RxD
TxD
SCK
RDR
RSR
TDR
SSR
BRR
SCR
TSR
SMR
Transmit/
receive
control
Baud rate
generator
Parity generation
Clock
Parity check
External clock
SCI
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
Figure 13.1 SCI Block Diagram
13.1.3 Pin Configuration
Table 13.1 summarizes the SCI pins.
Table 13.1 SCI Pins
Pin Name
Serial clock pin
Receive data pin
Transmit data pin
Abbreviation Input/Output
SCK
Input/output
RxD
Input
TxD
Output
Function
Clock input/output
Receive data input
Transmit data output
Internal
data bus
φ/4
φ/16
φ/64
φ/256
TEI
TXI
RXI
ERI
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