wm8940gefl-v Wolfson Microelectronics plc, wm8940gefl-v Datasheet - Page 72

• Manufacturer Part Number: wm8940gefl-v
• Description: Mono Codec With Speaker Driver
• Manufacturer: Wolfson Microelectronics plc

WM8940
w
8 (08h)
9 (09h)
10 (0Ah)
REGISTER
ADDRESS
6
5
4
3:1
0
15:8
7
6
5:4
3
2:0
15:2
1
0
15:7
BIT
POB_CTRL
SOFT_START
TOGGLE
SR
SLOWCLKEN
MODE_GPIO
OPCLKDIV
GPIOPOL
GPIOSEL
AUTOINC
LABEL
0
0
0
00
0
1
0
0
000
00h
0
000
0
00
DEFAULT
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
Fast VMID Discharge
0=normal
1=enable (used during powerdown)
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
Enables the Timeout Clock for zero cross detection.
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 what 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
CSB/GPIO pin function select:
000=CSB input
001= Jack insert detect
010=Temp ok
011=Amute active
100=PLL clk o/p
101=PLL lock
110=Reserved
111=Reserved
Reserved
Auto-Incremental write enable
0=Auto-Incremental writes disabled
1=Auto-Incremental writes enabled
Reserved
Reserved
DESCRIPTION
PD, Rev 4.2, April 2008
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
Control Interface
REFER TO
Production Data
72