SH7147 Datasheet, PDF (657/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 14 Synchronous Serial Communication Unit
14.6 Usage Notes
14.6.1 Module Standby Mode Setting
The synchronous serial communication unit operation can be disabled or enabled using the
standby control register. The initial setting is for synchronous serial communication unit operation
to be halted. Access to registers is enabled by clearing module standby mode. For details, refer to
section 22, Power-Down Modes.
14.6.2 Access to SSTDR and SSRDR Registers
Do not access SSTDR and SSRDR registers not validated by the setting of the DATS bits of the
SSCRL register. If accessed, transmission or reception thereafter may not be performed normally.
14.6.3 Continuous Transmission/Reception in Synchronous Serial Communication Slave
Mode
During continuous transmission/reception in synchronous serial communication slave mode,
negate the SCS pin (high level) for every frame. If the SCS pin is kept asserted (low level) for
more than one frame, transmission or reception cannot be performed correctly.
Rev. 3.00 Oct. 06, 2008 Page 633 of 1080
REJ09B0230-0300