HD6475328-CP10 Datasheet, PDF (261/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

14.1.2 Block Diagram
Figure 14-1 shows a block diagram of serial communication interface.
Module data bus
Internal
data bus
RXD
TXD
SCK
RDR
RSR
TDR
TSR
Parity generator
SSR
SCR
SMR
Communication
control
BRR
Baud-rate
generator
Internal clock
source
ø
ø/4
ø/16
ø/64
Parity check
Clock
External clock
RDR: Receive Data Register
RSR: Receive Shift Register
TDR: Transmit Data Register
TSR: Transmit Shift Register
SSR: Serial Status Register
SCR: Serial Control Register
SMR: Serial Mode Register
BRR: Bit Rate Register
TXI
RXI
ERI
Interrupt signals
Figure 14-1 Block Diagram of Serial Communication Interface
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