WM9713L_06 WOLFSON [Wolfson Microelectronics plc], WM9713L_06 Datasheet - Page 79

• Manufacturer Part Number: WM9713L_06
• Description: AC 97 Audio + Touchpanel CODEC
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
POWER MANAGEMENT
INTRODUCTION
AC97 CONTROL REGISTER
EXTENDED POWERDOWN REGISTERS
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The WM9713L includes the standard power down control register defined by the AC’97 specification
(register 26h). Additionally, it also allows more specific control over the individual blocks of the device
through register Powerdown registers 3Ch and 3Eh. Each particular circuit block is active when both
the relevant bit in register 26h AND the relevant bit in the Powerdown registers 3Ch and 3Eh are set
to ‘0’.
Note that the default power-up condition is all OFF.
Table 64 Powerdown and Status Register (Conforms to AC’97 Rev 2.2)
Table 65 Extended Power Down Register (1) (Additional to AC’97 Rev 2.2)
Note:
1.
26h
Powerdown/
Status
register
3Ch
Powerdown
(1)
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
REGISTER
ADDRESS
ADDRESS
When disabling a PGA, always ensure that it is muted first.
15
14
13
12
11
10
9
7
6
5
4
3
2
1
0
14
13
12
11
10
9
8
3
2
1
0
BIT
BIT
PR6
PR5
PR4
PR3
PR2
PR1
PR0
REF
ANL
DAC
ADC
PADCPD
VMID1M
TSHUT
VXDAC
AUXDAC
VREF
PLL
DACL
DACR
ADCL
ADCR
HPLX
HPRX
SPKX
MX
LABEL
LABEL
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
0
0
0
0
DEFAULT
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
1 (OFF)
DEFAULT
Disables all output PGAS
Disables internal clock
Disables AC-link interface (external clock off)
Disables VREF, input PGAs, DACs, ADCs,
mixers and outputs
Disables input PGAs and mixers
Disables stereo DAC
Disables stereo ADCs and record mux PGA
Read-only bit, indicates VREF is ready (inverse
of PR3)
Read-only bit, indicates analogue mixers are
ready (inverse of PR2)
Read-only bit, indicates stereo DAC is ready
(inverse of PR1)
Read-only bit, indicates stereo ADC is ready
(inverse of PR0)
Disables touchpanel/aux ADC
Disables 1Meg Vmid resistor string
Disables thermal shutdown
Disables VXDAC
Disables AUXDAC
Disables master bias reference generator
Disables PLL
Disables left DAC (see Note 1)
Disables right DAC (see Note 1)
Disables left ADC
Disables right ADC
Disables left headphone mixer
Disables right headphone mixer
Disables speaker mixer
Disables mono mixer
DESCRIPTION
DESCRIPTION
PP Rev 3.0 June 2006
WM9713L
79