Figure 14.16 Sample Sci Transmission Operation In Clocked Synchronous Mode - Renesas H8S Series Hardware Manual

Section 14 Serial Communication Interface (SCI)
Synchronization
clock
Serial data
TDRE
TEND
TXI interrupt
request generated

Figure 14.16 Sample SCI Transmission Operation in Clocked Synchronous Mode

Rev. 6.00 Mar 15, 2006 page 358 of 570
REJ09B0211-0600
Transfer direction
Bit 0 Bit 1
Data written to TDR
and TDRE flag cleared
to 0 in TXI interrupt
service routine
1 frame
Bit 7 Bit 0 Bit 1
TXI interrupt
request generated
Bit 6 Bit 7
TEI interrupt request
generated