Datasheet

Section 15 Serial Communication Interface (SCI, IrDA)
R01UH0309EJ0500 Rev. 5.00 Page 861 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
RxD
TxD
SCK
Clock
External clock
φ
φ/4
φ/16
φ/64
TEI
TXI
RXI
ERI
SCMR
SSR
SCR
SMR
SEMR
Transmission/
reception control
Baud rate
generator
BRR
Module data bus
RDR
TSRRSR
Parity generation
Parity check
TDR
Bus interface
Internal
data bus
Average transfer
rate generator
(SCI_2)
10.667 MHz operation
• 115.152 kbps
• 460.606 kbps
16 MHz operation
• 115.196 kbps
• 460.784 kbps
• 720 kbps
32 MHz operation
• 720 kbps
[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
SEMR: Serial extension mode register (only in SCI_2)
Figure 15.1 Block Diagram of SCI