h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 551

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

In serial reception, the SCI operates as described below.
[1] The SCI performs internal initialization in synchronization with serial clock input or output.
[2] The received data is stored in RSR in LSB-to-MSB order.
[3] If the RIE bit in SCR is set to 1 when the RDRF flag changes to 1, a receive data full interrupt
After reception, the SCI checks whether the RDRF flag is 0 and the receive data can be
transferred from RSR to RDR.
If this check is passed, the RDRF flag is set to 1, and the receive data is stored in RDR. If a
receive error is detected in the error check, the operation is as shown in table 13-11.
Neither transmit nor receive operations can be performed subsequently when a receive error
has been found in the error check.
(RXI) request is generated.
Also, if the RIE bit in SCR is set to 1 when the ORER flag changes to 1, a receive error
interrupt (ERI) request is generated.
Figure 13-19 shows an example of SCI operation in reception.
Simultaneous serial data transmission and reception (clocked synchronous mode)
Figure 13-20 shows a sample flowchart for simultaneous serial transmit and receive
operations.
The following procedure should be used for simultaneous serial data transmit and receive
operations.
Figure 13-19 Example of SCI Operation in Reception
Section 13 Serial Communication Interface (SCI)
Rev. 6.00 Feb 22, 2005 page 491 of 1484
REJ09B0103-0600