NEC uPD78056Y - Manual (Page 312)

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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78054 Subseries)
(d) Command and data
The master device transmits commands to, and transmits/receives data to/from the slave device selected
by address transmission.
Figure 16-16. Commands
Figure 16-17. Data
8-bit data following a command signal is defined as “command” data. 8-bit data without command signal
is defined as “data”. Command and data operation procedures are allowed to determine by user according
to communications specifications.
SCK0
C7 C6 C5 C4 C3 C2 C1 C0
1 2 3 4 5 6 7 8
SB0 (SB1)
Command Command Signal
SCK0
D7 D6 D5 D4 D3 D2 D1 D0
1 2 3 4 5 6 7 8
SB0 (SB1)
Data