YSS932 Datasheet, PDF (19/23 Pages) YAMAHA CORPORATION – 96kHz DIR + Dolby Digital / Pro Logic II / DTS decoder + Sub DSP

YSS932
Microprocessor Interface Format
A four-wire serial interface is used to read and write the control registers.
/CS
SCK
SI
write
R/W = L
SO
Don't Care A0 A1 A2 A3 A4 A5 A6 R/W D0 D1 D2 D3 D4 D5 D6 D7 Don't Care
High-Z
SI
read
R/W = H
SO
Don't Care A0 A1 A2 A3 A4 A5 A6 R/W
Don't Care
Don't Care
High-Z
High-Z
D0 D1 D2 D3 D4 D5 D6 D7
SO becomes an output pin only when all of the following conditions are met.
- /CS=L
- When reading the valid addresses
- Timing of 8 bits data output
If any of the above conditions is not met, SO outputs High-Z. Thus SO, SI and SCK can be used jointly with other
devices that have similar interfaces.
[CAUTION]
Set /CS=H during /IC=L.
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