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CHAPTER 14 SERIAL INTERFACE (SIO1)
Notes 1. Bits 3 and 4 (TRF0 and ERR0) are read-only bits.
2. When BUSY10 is reset to 0, P81 (CMOS I/O) is used even when bit 7 (CSIE10) of the serial
operating mode register 1 (CSIM1) is set to 1.
3. When STRB0 is reset to 0, P80 (CMOS I/O) is used even when bit 7 (CSIE10) of CSIM1 is
set to 1.
4. When an interrupt is acknowledged, interrupt request flag CSIIF1 is cleared. Therefore, use
TRF0, instead of CSIIF1, to identify the completion of automatic transmission/reception.
5. When RE0 is reset to 0, P84 (CMOS I/O) is used even when bit 7 (CSIE10) of CSIM1 is set
to 1.
Caution
When an external clock input is selected with CSIM1 bits 1, 0 (SCL101, SCL100) are set
to 0, set ADTC0 bits 2, 1 (STRB0, BUSY10) to 0, 0. (when an external clock is input, the
hand-shake control cannot be performed).
Remark ×: don't care
Preliminary User's Manual U13420EJ2V0UM00
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