wm9714l Wolfson Microelectronics plc, wm9714l Datasheet - Page 78

• Manufacturer Part Number: wm9714l
• Description: Ac?97 Audio Codec
• Manufacturer: Wolfson Microelectronics plc

WM9714L
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Table 61 Extended Power Down Register (2) (Additional to AC’97 Rev 2.2)
Note:
1.
3Eh
Powerdown
(2)
Note: When analogue inputs or outputs are disabled, they are internally connected to VREF
through a large resistor (VREF=AVDD/2 except when VREF and VMID1M are both OFF). This
maintains the potential at that node and helps to eliminate pops when the pins are re-enabled.
REGISTER
ADDRESS
When disabling a PGA, always ensure that it is muted first.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
BIT
MCD
MICBIA
S
MONO
OUT4
OUT3
HPL
HPR
SPKL
SPKR
LL
LR
MOIN
MA
MB
MPA
MPB
LABEL
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
1
(disabled)
DEFAULT
Microphone Current Detect Disable Control
1 = Disabled
0 = Enabled
Microphone Bias Disable Control (see Note 1)
1 = Disabled
0 = Enabled
MONO PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
OUT4 PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
OUT3 PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
HPL PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
HPR PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
SPKL PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
SPKR PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
LINEL PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
LINER PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
MONOIN PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
MICA PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
MICB PGA Disable Control (see Note 1)
1 = Disabled
0 = Enabled
Mic Pre-amp MPA Disable Control
1 = Disabled
0 = Enabled
Mic Pre-amp MPB Disable Control
1 = Disabled
0 = Enabled
DESCRIPTION
PP, Rev 3.2, October 2008
Pre-Production
78