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WM8595 Datasheet(PDF) 66 Page - Wolfson Microelectronics plc

Part # WM8595
Description  24-bit 192kHz 2Vrms Multi-Channel CODEC
PDF  82 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8595 Datasheet(HTML) 66 Page - Wolfson Microelectronics plc

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WM8595
Production Data
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PD, Rev 4.2, January 2011
66
R35 (23h) – Bias Control Register (BIAS)
Bit #
15
14
13
12
11
10
9
8
Read
0
0
0
0
0
0
0
0
Write
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Default
0
0
0
0
0
0
0
0
Bit #
7
6
5
4
3
2
1
0
Read
VMID_SEL[1:0]
BIAS_EN
SOFT_ST
BUFIO_EN
FAST_EN
VMIDTOG
POBCTRL
Write
Default
0
0
0
1
0
0
0
0
N/A = Not Applicable (no function implemented)
Function
Description
POBCTRL
Bias Source for Output Amplifiers
0 = Output amplifiers use master bias
1 = Output amplifiers use fast bias
VMIDTOG
VMID Power Down Characteristic
0 = Slow ramp
1 = Fast ramp
FAST_EN
Fast Bias Enable
0 = Fast bias disabled
1 = Fast bias enabled
BUFIO_EN
VMID Buffer Enable
0 = VMID Buffer disabled
1 = VMID Buffer enabled
SOFT_ST
VMID Soft Ramp Enable
0 = Soft ramp disabled
1 = Soft ramp enabled
BIAS_EN
Master Bias Enable
0 = Master bias disabled
1 = Master bias enabled
Also powers down VMID1C
VMID_SEL[1:0]
VMID Resistor String Value Selection (VMID2C only)
00 = off (no VMID)
01 = 38k
10 = 127k
11 = 12.5k
The selection is the total resistance of the string from VREF2VDD to VREF2GND. The VMID1C
resistance is fixed at 200k.
Figure 47 R35 – Bias Control Register



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