WM8232 datasheet(56/141 Pages) CIRRUS

номер детали	WM8232

подробное описание детали	105MSPS 3-Channel AFE with Sensor

PDF	141 Pages

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производитель	CIRRUS [Cirrus Logic]

домашняя страница	http://www.cirrus.com

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WM8232

Rev 4.6

AGC CONFIGURATION

Figure 47 shows the procedure for AGC Configuration.

TG enabled: This must be enabled when AGC function is used.

AGC averaging factor configuration: This is averaging factor for peak level detection.

AGC APD/DPD configuration: This is line iteration setting for peak level detection.

AGC target level configuration: The output code will be calibrated to this target level after APGA

and DPGA calibration. APGA and DPGA keep calibrated gain value while AGC is enabled.

(AGC_EN=1)

Peak detection period configuration: This is the setting for peak detection period.

AGC configuration

AGC averaging factor

configuration

0x57[7:4] AGCAVE

AGC APD

configuration

0x58[2:0] AGC_APD

AGC target level

configuration

0x5D,5E,63,64,69,6A

AGC_TARGETIN*

AGC DPD

configuration

0x58[6:4] AGC_DPD

AGC enabled (*2)

0x57[0] AGC_EN=1

Start AGC operation

TGSYNC

Peak detection period

configuration

0xBF,0xC0 PEAKDET_RISE

0xC1,0xC2 PEAKDET_FALL

Line length

configuration

enabled

0xA1,0xA2 LLENGTH

0xA0[0] TG_EN

TG mode

selection

Master mode

0xA0[1] TGMD=1

Slave mode

0xA0[1] TGMD=0

TG enabled (*1)

Figure 47 AGC configuration

Notes:

1. This must be set when AGC is used.

2. With this register set, AGC sequence will be started after TGSYNC is recognized.

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