HD64F2638F20J Datasheet, PDF (497/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
13.1.2 Block Diagram
Figure 13-1 shows a block diagram of the SCI.
Section 13 Serial Communication Interface (SCI)
Module data bus
RxD
TxD
SCK
RDR
RSR
TDR
SCMR
BRR
SSR
TSR
SCR
SMR
Transmission/
reception control
Baud rate
generator
Parity generation
Clock
Parity check
External clock
Legend:
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
SCMR: Smart card mode register
BRR: Bit rate register
Figure 13-1 Block Diagram of SCI
φ
φ/4
φ/16
φ/64
TEI
TXI
RXI
ERI
Internal
data bus
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 447 of 1458