wm8595 Wolfson Microelectronics plc, wm8595 Datasheet - Page 34

• Manufacturer Part Number: wm8595
• Description: 24-bit 192khz 2vrms Multi-channel Codec
• Manufacturer: Wolfson Microelectronics plc

WM8595
w
Note: When ATTACK_BYPASS=1 or DECAY_BYPASS=1, it is recommended that the zero cross
function for the PGA is used to eliminate click noise when changing volume settings.
Table 24 Analogue Volume Ramp Control
PGA_CTRL1
ADD_CTRL1
PGA_CTRL3
REGISTER
ADDRESS
R25
R27
1Bh
R36
19h
24h
BIT
6:4
3:1
10
0
1
PGA_UPD
ATTACK_
DECAY_
BYPASS
BYPASS
SEL[2:0]
LABEL
SR[2:0]
PGA_
PGA_
DEFAULT
001
000
0
0
0
PGA Gain Decay Mode
0 = PGA gain will ramp down
1 = PGA gain will step down
PGA Gain Attack Mode
0 = PGA gain will ramp up
1 = PGA gain will step up
Sample Rate for PGA
000 = 32kHz
001 = 44.1kHz
010 = 48kHz
011 = 88.2kHz
100 = 96kHz
101 = 176.4kHz
11X = 192kHz
See Table 23 for further information on PGA
sample rate versus volume ramp rate.
PGA Ramp Control Clock Source
000 = LRCLK1
001 = LRCLK2
010 to 110 = Reserved
111 = ADCLRCLK (when ADC is being used
in master mode)
PGA Ramp Control Clock Source Mux
Update
0 = Do not update PGA clock source
1 = Update clock source
DESCRIPTION
PD, Rev 4.1, April 2010
Production Data
34