wm9713 Wolfson Microelectronics plc, wm9713 Datasheet - Page 118

• Manufacturer Part Number: wm9713
• Description: Ac?97 Audio + Touchpanel Codec
• Manufacturer: Wolfson Microelectronics plc

60h
62h
WM9713L
Registers 60h and 62h control the ALC and Noise Gate functions.
w
REGISTER
ADDRESS
15:12
11:8
7:4
3:0
15:14
13:11
10:9
7
5
4:0
BIT
ALCL
HLD
DCY
ATK
ALCSEL
MAXGAIN
ZC
TIMEOUT
NGAT
NGG
NGTH
LABEL
1011 (-12dB)
0000 (0ms)
0011 (192ms)
0010 (24ms)
00 (disabled)
111 (+30dB)
11 (slowest)
0 (disabled)
0 (hold gain)
00000 (-
76.5dB)
DEFAULT
ALC Target Level Control
0000 = -28.5dBFS
… (1.5dB steps)
1111 = -6dBFS
ALC Hold Time Control
0000 = 0ms
0001 = 2.67ms
… (time doubles with every step)
1111 = 43.691s
ALC Decay Time Control
0000 = 24ms
… (time doubles with every step)
1010 to 1111 = 24.58s
ALC Attack Time Control
0000 = 6ms
… (time doubles with every step)
1010 to 1111 = 6.14s
ALC Function Channel Control
00 = ALC disabled
01 = ALC on right channel only
10 = ALC or left channel only
11 = ALC on both left and right channels
ALC PGA Gain Limit Control
000 = -12dB
… (6dB steps)
111 = +30dB
ALC Zero Cross Timeout Delay Control
00 = 2
01 = 2
10 = 2
11 = 2
Noise Gate Enable Control
0 = Disabled
1 = Enabled
Noise Gate Function Control
0 = Hold PGA gain at last value
1 = Mute ADC output
Noise Gate Threshold Control
00000 = -76.5dBFS
… (1.5dB steps)
11111 = -30dBFS
14
15
16
17
x t
x t
x t
x t
BITCLK
BITCLK
BITCLK
BITCLK
(1.33ms)
(2.67ms)
(5.33ms)
(10.67ms)
DESCRIPTION
PP Rev 3.2 September 2008
Pre-Production
Audio ADC,
Automatic
Level Control
REFER TO
118