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NEC PD75402A User Manual

Page 109

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CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS

(d) Command & data

The master performs command transmission to or data transmission/reception to/from the slave selected

by address transmission.

Fig. 5-38 Command

SCK

SB0

Command Signal

Command

1

2

3

4

5

6

7

8

C7

C6

C5

C4

C3

C2

C1

C0

Fig. 5-39 Data

SCK

SB0

1

2

3

4

5

6

7

8

D7

D6

D5

D4

D3

D2

D1

D0

Data

The 8-bit data following the command signal is defined as a command. 8-bit data with no command signal

is defined as data. The way in which commands and data are used can be freely decided according to the

communication specifications.

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