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WM8595 Datasheet(PDF) 62 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) 62 Page - Wolfson Microelectronics plc

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WM8595
Production Data
w
PD, Rev 4.2, January 2011
62
Function
Description
PGA1L_VOL[7:0]
PGA1R_VOL[7:0]
PGA2L_VOL[7:0]
PGA2R_VOL[7:0]
Input PGA Volume
0000 0000 = +6dB
0000 0001 = +5.5dB
…0.5dB steps
00001100 = 0dB
…
1001 1110 = -73.5dB
1001 1111 = PGA Mute
PGA1L_VU
PGA1R_VU
PGA2L_VU
PGA2R_VU
Input PGA Volume Update
0 = Latch corresponding volume setting into Register Map but do not update volume
1 = Latch corresponding volume setting into Register Map and update all channels simultaneously
Figure 40 R19-24 – PGA Volume Control Registers
R25 (19h) – PGA Control Register 1 (PGA_CTRL1)
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
0
0
PGA2R_ZC
PGA2L_ZC
PGA1R_ZC
PGA1L_ZC
ATTACK_
BYPASS
DECAY_
BYPASS
Write
N/A
N/A
Default
0
0
0
0
0
0
0
0
N/A = Not Applicable (no function implemented)
Function
Description
DECAY_BYPASS
PGA Gain Decay Mode
0 = PGA gain will ramp down
1 = PGA gain will step down
ATTACK_BYPASS
PGA Gain Attack Mode
0 = PGA gain will ramp up
1 = PGA gain will step up
PGA1L_ZC
PGA1R_ZC
PGA2L_ZC
PGA2R_ZC
PGA Gain Zero Cross Enable
0 = PGA gain updates occur immediately
1 = PGA gain updates occur on zero cross
Zero cross must be disabled to use gain ramp
Figure 41 R25 – PGA Control Register 1



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