WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 66

• Manufacturer Part Number: WM8974GEFL/V
• Description: Audio CODECs Mono Codec with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8974GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8974
Notes:
w
56
REGISTER BITS BY ADDRESS
1. Default values of N/A indicate non-latched data bits (e.g. software reset or volume update bits).
2. Register bits marked “s "Reser”ed" should not be changed from the default.
DEC HEX
B[15:9]
0 (00h)
1 (01h)
2 (02h)
3 (03h)
ADDR
REGISTER
ADDRESS
38
MONO mixer ctrl
REGISTER
[8:0]
8
7
6
5
4
3
2
1:0
8:5
4
3
2
1
0
8
NAME
BIT
RESET
BUFDCOPEN
AUXEN
PLLEN
MICBEN
BIASEN
BUFIOEN
VMIDSEL
BOOSTEN
INPPGAEN
ADCEN
LABEL
B8
0
0
0
0
00
0
0
N/A
0
0
0
0
0000
0
0
0
0
DEFAULT
B7
0
MONO
MUTE
B6
Software reset
Dedicated buffer for DC level shifting output stages when in
1.5x gain boost configuration.
0=Buffer disabled
1=Buffer enabled (required for 1.5x gain boost)
Reserved
Auxilliary input buffer enable
0 = OFF
1 = ON
PLL enable
0=PLL off
1=PLL on
Microphone Bias Enable
0 = OFF (high impedance output)
1 = ON
Analogue amplifier bias control
0=Disabled
1=Enabled
Unused input/output tie off buffer enable
0=Disabled
1=Enabled
Reference string impedance to VMID pin:
00=off (open circuit)
01=50k Ω
10=500k Ω
11=5k Ω
Reserved
Input BOOST enable
0 = Boost stage OFF
1 = Boost stage ON
Reserved
Input microphone PGA enable
0 = disabled
1 = enabled
Reserved
ADC Enable Control
0 = ADC disabled
1 = ADC enabled
Reserved
B5
0
DESCRIPTION
B4
0
B3
0
MONO
AUX2
B2
PD, Rev 4.5, September 2008
MONO
BYP2
B1
Resetting the Chip
Analogue Outputs
Auxiliary Inputs
Master Clock and
Phase Locked Loop
(PLL)
Microphone Biasing
Circuit
Power
Management
Enabling the
Outputs
Power
Management
Input Boost
Input Signal Path
Analogue to Digital
Converter (ADC)
Production Data
MONO
DAC2
REFER TO
B0
000
DEF’T
(HEX)
VAL
66