WM8771 datasheet(16/44 Pages) WOLFSON

номер детали	WM8771

подробное описание детали	24-bit, 192kHz 8-Channel Codec

PDF	44 Pages

Scroll/Zoom	100%

производитель	WOLFSON [Wolfson Microelectronics plc]

домашняя страница	http://www.wolfsonmicro.com

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WM8771

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PP Rev 2.0 December 2001

POWERDOWN MODES

The WM8771 has powerdown control bits allowing specific parts of the WM8771 to be powered off

when not being used. The 8-channel input source selector and input buffer may be powered down

using control bit AINPD. When AINPD is set all inputs to the source selector (AIN1l/R to AIN8L/R)

are switched to a buffered VMIDADC. Control bit ADCPD powers off the ADC and also the ADC input

PGAs. The four stereo DACs each have a separate powerdown control bit, DACPD[3:0] allowing

individual stereo DACs to be powered off when not in use. The analogue output buffer may also be

powered down by setting OUTPD[3:0]. OUTPD[3:0] also switches the analogue outputs VOUTL/R to

VMIDDAC to maintain a dc level on the output.

Setting AINPD, ADCPD, DACPD[3:0] and

OUTPD[3:0] will powerdown everything except the references VMIDADC, ADCREF and VMIDDAC.

These may be powered down by setting PDWN. Setting PDWN will override all other powerdown

control bits. It is recommended that the 8-channel input mux and buffer, ADC, DAC and output

buffers are powered down before setting PDWN. The default is for all powerdown bits to be set

except PDWN.

WM8771 датащи(PDF) 16 Page - Wolfson Microelectronics plc