Datasheet

Section 16 Synchronous Serial Communication Unit (SSU)
Rev. 4.00 Mar. 15, 2006 Page 368 of 556
REJ09B0026-0400
Serial Data Transmission and Reception: Data transmission and reception is a combined
operation of data transmission and reception which are described before. Transmission and
reception is started by writing data in SSTDR. When the eighth clock rises or the ORER bit is set
to 1 while the TDRE bit is set to 1, transmission and reception is stopped.
To switch from transmit mode (TE = 1) or receive mode (RE = 1) to transmit and receive mode
(TE = RE = 1), the TE and RE bits should be cleared to 0. After confirming that the TEND,
RDRF, and ORER bits are cleared to 0, set the TE and RE bits to 1.
Figure 16.9 shows a sample flowchart for serial transmit and receive operations.