Sbi Transfer Timing - NEC mPD780208 Subseries User Manual

8-bit single-chip microcontrollers

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(2) SBI definition

The SBI serial data format is defined as follows.

Serial data to be transferred with SBI is distinguished into three types, "address", "command", and "data".

Figure 13-10 shows the address, command, and data transfer timing.

Address transfer

Command transfer

Data transfer

Remark The broken line indicates the READY status.

The bus release signal and the command signal are output by the master device. BUSY is output by the

slave. ACK can be output by either the master or slave device (normally, the 8-bit data receiver outputs

Serial clocks continue to be output by the master device from 8-bit data transfer start to BUSY reset.

CHAPTER 13 SERIAL INTERFACE CHANNEL 0

Figure 13-10. SBI Transfer Timing

Command signal

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