AK7750VT datasheet(64/77 Pages) AKM

Part #	AK7750VT

Description	Audio DSP with Built-in Hands-Free Phone Features

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Manufacturer	AKM [Asahi Kasei Microsystems]

Direct Link	http://www.akm.com

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64 / 77 page

[ASAHI KASEI]

[AK7750]

[MS0296-E-00]

64

2005/03

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, “0” 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 “0”, so please

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

Data transfer procedure

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.

70h(example)

74h(example)

D7

D1

D7

D1

SI

SO

SCLK

RQ

S_RESET =H

Example of Control Register Read

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