wm8941 Wolfson Microelectronics plc, wm8941 Datasheet - Page 79

• Manufacturer Part Number: wm8941
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

Production Data
w
7 (07h)
8 (08h)
REGISTER
ADDRESS
0
15:7
6
5
4
3:1
0
15:8
7
6
5:4
3
2:0
BIT
MS
POB_CTRL
SOFT_START
TOGGLE
SR
SLOWCLKEN
MODE_GPIO
OPCLKDIV
GPIOPOL
GPIOSEL
LABEL
0
00000
0
0
0
000
0
00h
0
0
00
0
000
DEFAULT
Sets the chip to be master over FRAME and BCLK
0=BCLK and FRAME clock are inputs
1=BCLK and FRAME clock are outputs generated by
the WM8941 (MASTER)
Reserved
Power on Bias Control
0=normal (current bias based on VMID)
1=Startup (current bias not based on VMID)
VMID Soft Start
0=disabled
1=enabled
0=normal
1=enable (used during power-down)
Approximate sample rate (configures the coefficients
for the internal digital filters):
000=48kHz
001=32kHz
010=24kHz
011=16kHz
100=12kHz
101=8kHz
110-111=reserved
Reserved
Selects MODE as a GPIO pin
0 = MODE is an input. MODE selects 2-wire mode
when low and 3-wire mode when high.
1 = MODE can be an input or output under the control
of the GPIO control register. Interface operates in 3-
wire mode regardless of when happens on the MODE
pin.
Reserved
PLL Output clock division ratio
00=divide by 1
01=divide by 2
10=divide by 3
11=divide by 4
GPIO Polarity invert
0=Non inverted
1=Inverted
GPIO function select:
000=GPIO off
001= Jack insert detect
010=Temp ok
011=Amute active
100=PLL clk o/p
101=PLL lock
110=Reserved
111=Reserved
Fast VMID Discharge
Enables the Timeout Clock for zero cross detection.
DESCRIPTION
PD, Rev 4.0, August 2008
Digital Audio
Interfaces
POP Minimisation
POP Minimisation
POP Minimisation
Audio Sample
Rates
Zero Cross
Timeout
Control Interface
General Purpose
Input Output
General Purpose
Input Output
General Purpose
Input Output
REFER TO
WM8941
79