AK4671_10 Datasheet, PDF (113/166 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/RCV/HP-AMP

[AK4671]
<SAR ADC Execute Sequence (in case that the interrupt function is not used.)>
[4-wire Serial Mode]
(1) Select the measurement mode by A1-0 bits and set PMSAD bit = “1” to power-up SAR ADC.
(2) Input “1” at the 4th bit just after R/W bit so that A/D conversion is executed and 10bit A/D data is output from 9th to
18th CCLK clock.
[I²C Mode]
(1) Select the measurement mode by A1-0 bits and set PMSAD bit = “1” to power-up SAR ADC.
(2) Read Addr=5BH so that A/D conversion is executed and MSB 8bit data is output.
(3) Continuously read Addr=5CH then LSB 2bit data is output.
<SAR ADC Execute Sequence (in case that the interrupt function is used.)>
[4-wire Serial Mode]
(1) GPOM1 bit should be set to “1”. The GPO1 pin can be used as the interrupt output pin.
(2) Select the measurement mode by A0 bit.
(3) The GPO1 pin goes to “H” when the input DC voltage of SAIN1 or SAIN2 pin (selected by A0 bit) is higher than the
input voltage of SAIN3 pin.
(4) After CPU detects GPO1 pin = “H”, set GPOM1 bit = “0” and PMSAD bit = “1” to power-up SAR ADC.
(5) Input “1” at the 4th bit just after R/W bit so that A/D conversion is executed and 10bit A/D data is output from 9th to
18th CCLK clock.
[I²C Mode]
(1) GPOM1 bit should be set to “1”. The GPO1 pin can be used as the interrupt output pin.
(2) Select the measurement mode by A0 bit.
(3) The GPO1 pin goes to “H” when the input DC voltage of SAIN1 or SAIN2 pin (selected by A0 bit) is higher than the
input voltage of SAIN3 pin.
(4) After CPU detects GPO1 pin = “H”, set GPOM1 bit = “0” and PMSAD bit = “1” to power-up SAR ADC.
(5) Read Addr=5BH so that A/D conversion is executed and MSB 8bit data is output.
(6) Continuously read Addr=5CH then LSB 2bit data is output.
MS0666-E-02
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2010/06