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WM8978CGEFL/V датащи(PDF) 84 Page - Wolfson Microelectronics plc

номер детали WM8978CGEFL/V
подробное описание детали  Stereo CODEC with Speaker Driver
PDF  118 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8978CGEFL/V датащи(HTML) 84 Page - Wolfson Microelectronics plc

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WM8978
Production Data
w
PD, Rev 4.5, October 2011
84
Power-up when using the output 1.5x boost stage:
1.
Turn on external power supplies. Wait for supply voltage to settle.
2.
Mute all analogue outputs.
3.
Enable unused output chosen from L/ROUT2, OUT3 or OUT4. If unused output not available,
chose one of these outputs not required at power up.
4.
Set BUFDCOPEN = 1 and BUFIOEN = 1 in register R1.
5.
Set SPKBOOST = 1 in register R49.
6.
Set VMIDSEL[1:0] to required value in register R1. Wait for the VMID supply to settle. *Refer
notes 1 and 2.
7.
Set L/RMIXEN = 1 and DACENL/R = 1 in register R3.
8.
Set BIASEN = 1 in register R1.
9.
Set L/ROUT2EN = 1 in register R3. *Note 3.
10. Enable other mixers as required.
11. Enable other outputs as required.
12. Set remaining registers.
Power Down (all cases):
2.
Mute all analogue outputs.
3.
Disable Power Management Register 1. R1 = 0x00.
4.
Disable Power Management Register 2. R2 = 0x00.
5.
Disable Power Management Register 3. R3 = 0x00.
6.
Remove external power supplies.



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