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WM8599SEFT/V データシート(PDF) 41 Page - Wolfson Microelectronics plc

部品番号 WM8599SEFT/V
部品情報  24-bit 192kHz 2Vrms Multi-Channel CODEC
PDF  74 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8599SEFT/V データシート(HTML) 41 Page - Wolfson Microelectronics plc

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WM8599
w
PP Rev 1.0 January 2007
41
•
BUFIO_EN=1
•
VMIDTOG=1
•
SOFT_ST=0
3.
Switch outputs to use fast bias instead of master bias:
•
POBCTRL=1
4.
Power down all WM8599 functions (ADC, DACs, PGAs etc.). The outputs are muted so the
write order is not important.
5.
Power down VMID to allow the analogue outputs to ramp gently to ground in a pop-free
manner.
•
VMID_SEL=00
6.
Wait until DACVMID has fully discharged. The time taken depends on system capacitance.
•
Insert delay
7.
Clamp outputs to ground.
•
APE_B=0
8.
Power down outputs.
•
VOUTxL_EN=0
•
VOUTxR_EN=0
9.
Disable remaining bias control bits.
•
FAST_EN=0
•
POBCTRL=0
•
BIAS_EN=0
Power supplies can now be safely removed from the WM8599 if desired. Table 30 describes the
various bias control bits for power up/down control.



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