SH7708 Datasheet, PDF (415/633 Pages) Renesas Technology Corp – SuperH™ RISC engine

Cautions on Use of Clock Synchronous External Clock Mode:
• Set TE = RE = 1 only when the external clock SCK is 1.
• Do not set TE = RE = 1 until at least four peripheral operating clock cycles after the external
clock SCK has changed from 0 to 1.
• When receiving, RDRF is 1 when RE is set to zero 2.5–3.5 peripheral operating clock cycles
after the rising edge of the RxD D7 bit SCK input, but it cannot be copied to SCRDR.
Caution on Use of Clock Synchronous Internal Clock Mode: When receiving, RDRF is 1 when
RE is set to zero 1.5 peripheral operating clock cycles after the rising edge of the RxD D7 bit SCK
output, but it cannot be copied to SCRDR.
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