H8S2609 Datasheet, PDF (427/624 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 13 Serial Communication Interface (SCI)
Transfer direction
Synchronization
clock
Serial data
Bit 0 Bit 1
Bit 7 Bit 0 Bit 1
Bit 6 Bit 7
TDRE
TEND
TXI interrupt
request generated
Data written to TDR
and TDRE flag cleared
to 0 in TXI interrupt
service routine
TXI interrupt
request generated
1 frame
TEI interrupt request
generated
Figure 13.16 Sample SCI Transmission Operation in Clocked Synchronous Mode
Rev. 1.00 Jan. 25, 2008 Page 393 of 586
REJ09B0428-0100