WM8731SED_13 Datasheet, PDF (49/65 Pages) Wolfson Microelectronics plc – Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates

WM8731 / WM8731L
Production Data
The device can be powered off by writing to the POWEROFF bit of the Power Down register. In
POWEROFF mode the Control Interface and a small portion of the digital remain active. The
analogue VMID reference is disabled. As in STANDBY mode the crystal oscillator and/or CLKOUT pin
can be independently controlled. Refer to Table 28.
DESCRIPTION
REGISTER MAP
1
0
0
X
X
X
X
1
1
0
X
X
X
X
1
1
1
X
X
X
X
Table 28 Poweroff Mode
X POWEROFF, but with Crystal
Oscillator OS and CLKOUT
available
X POWEROFF, but with Crystal
Oscillator OS available, CLKOUT
not-available
X POWEROFF, Crystal oscillator
and CLKOUT not-available.
The complete register map is shown in Table 29. The detailed description can be found in Table 30
and in the relevant text of the device description. There are 11 registers with 16 bits per register (7 bit
address + 9 bits of data). These can be controlled using either the 2 wire or 3 wire MPU interface.
REGISTER
R0 (00h)
Left Line In
R1 (01h)
Right Line In
R2 (02h)
Left
Headphone Out
R1 (01h)
Right
Headphone Out
R4 (04h)
Analogue Audio
Path Control
R5 (05h)
Digital Audio
Path Control
R6 (06h)
Power Down
Control
R7 (07h)
Digital Audio
Interface Format
R8 (08h)
Sampling
Control
R9 (09h)
Active Control
BIT[8]
LRINBOTH
RLINBOTH
LRHPBOTH
RLHPBOTH
0
0
0
0
0
0
BIT[7]
LINMUTE
RINMUTE
LZCEN
BIT[6]
0
0
RZCEN
SIDEATT[1:0]
0
0
POWEROFF CLKOUTPD
BCLKINV
MS
CLKODIV2 CLKIDIV2
0
0
BIT[5]
0
0
SIDETONE
0
OSCPD
LRSWAP
0
BIT[4]
BIT[3]
BIT[2]
LINVOL[4:0]
RINVOL[4:0]
LHPVOL[6:0]
BIT[1]
BIT[0]
DEFAULT
0_1001_0111
0_1001_0111
0_0111_1001
RHPVOL[6:0]
0_0111_1001
DACSEL
BYPASS
INSEL
MUTEMIC MICBOOST 0_0000_1010
HPOR
DACMU
DEEMPH[1:0]
ADCHPD 0_0000_1000
OUTPD
DACPD
ADCPD
MICPD
LINEINPD 0_1001_1111
LRP
IWL[1:0]
FORMAT[1:0]
0_1001_1111
SR[3:0]
0
0
BOSR
USB/
NORMAL
0_0000_0000
0
0
Active
0_0000_0000
R15 (0Fh)
Reset
RESET[8:0]
not reset
Table 29 Register Map
w
PD, Rev 4.9, October 2012
49