AK7750 Datasheet, PDF(64/77 Page) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

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AK7750 Datasheet, PDF (64/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

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[ASAHI KASEI]

[AK7750]

4) Read During RUNNING

a) Control Register read out ( during RUN )

It is possible to read out Control Registers in RUN mode. D7 ~ D1 control register values are output at the

falling edge of SCLK after a command code is input. As no register exists at D0 location, â0â is always

output until the 16th rising edge of SCLK.

Note) when D0 data is taken at the 16th rising edge of SCLK, it is not necessarily always â0â, so please

ignore the D0 value (as it is indeterminate after the 16th rising edge of SCLK).

Data transfer procedure

c Command code 70h,72h,74h,76h,78h,7Ah,7Ch,D8h,DAh,DCh

note ) 50h,54h,58h are not used as they are for testing.

For each Bit function, please refer to section (2) Control Register Settings.

S_RESET =H

SCLK

70h(example)

D7yyyyD1

74h(example)

D7yyyyD1

Example of Control Register Read

[MS0296-E-00]

2005/03

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