h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 484

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 Synchronous Serial Communication Unit (SSU)
Data Transmission/Reception
Figure 16.9 shows an example of simultaneous transmission/reception operation. The data
transmission/reception is performed combining the data transmission and data reception as
mentioned above. The data transmission/reception is started by writing transmit data to SSTDR
with TE RE 1.
When the RDRF has been set to 1 at the 8th rising edge of the transfer clock (in a case of 8-bit
data length), the ORER bit in SSSR is set to 1. This indicates that an overrun error (OEI) has
occurred. At this time, data transmission/reception is stopped. While the ORER bit in SSSR is set
to 1, transmission/reception is not performed. To resume the transmission/reception, clear the
ORER bit to 0.
Before switching transmission mode (TE 1) or reception mode (RE 1) to
transmission/reception mode (TE
RE 1), clear the TE and RE bits to 0. When starting the
transfer, confirm that the TEND, RDRF, and ORER bits are cleared to 0 before setting the TE and
RE bits to 1.
Rev. 3.00 Oct 04, 2005 page 444 of 598
REJ09B0155-0300