NEC uPD78056Y - Manual (Page 333)

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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78054 Subseries)
16.4.4 2-wire serial I/O mode operation
The 2-wire serial I/O mode can cope with any communication format by program.
Communication is basically carried out with two lines of serial clock (SCK0) and serial data input/output (SB0 or
SB1).
Figure 16-31. Serial Bus Configuration Example Using 2-Wire Serial I/O Mode
Master
SCK0
Slave
SB0 (SB1)
SCK0
SB0 (SB1)
V DD V DD