H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 634

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 Serial Communication Interface (SCI)
Serial data reception (clocked synchronous mode): Figure 13.18 shows a sample flowchart for
serial reception.
The following procedure should be used for serial data reception.
When changing the operating mode from asynchronous to clocked synchronous, be sure to check
that the ORER, PER, and FER flags are all cleared to 0.
The RDRF flag will not be set if the FER or PER flag is set to 1, and neither transmit nor receive
operations will be possible.
Rev. 3.00 Sep 15, 2006 page 600 of 988
REJ09B0330-0300
Serial clock
Serial data
TDRE
TEND
TXI interrupt
request generated
Figure 13.17 Example of SCI Operation in Transmission
interrupt service routine
Data written to TDR
cleared to 0 in TXI
Bit 7
and TDRE flag
Transfer direction
Bit 0
1 frame
TXI interrupt
request generated
Bit 7
Bit 0
Bit 1
Bit 6
TEI interrupt
request generated
Bit 7