wm8952 Wolfson Microelectronics plc, wm8952 Datasheet - Page 62

• Manufacturer Part Number: wm8952
• Description: Mono Adc With Microphone Pre-amplifier
• Manufacturer: Wolfson Microelectronics plc

WM8952
w
39 (27h)
40 (28h)
41 (29h)
42 (2Ah)
43 (2Bh)
44 (2Ch)
45 (2Dh)
46 (2Eh)
47 (2Fh)
REGISTER
ADDRESS
15:9
8:0
15:0
15:0
15:2
1
0
15:0
15:9
8
7:4
3
2
1
0
15:8
7
6
5:0
15:0
15:9
BIT
PLLK[8:0]
ALCZC
MBVSEL
AUXMODE
AUX2INPPGA
MICN2INPPGA
MICP2INPPGA
INPPGAZC
INPPGAMUTE
INPPGAVOL
LABEL
011101001
0000h
0000h
0 (zero
cross off)
0
0
0
1
0
00h
0
0
0000h
00h
0h
00h
0
1
010000
0000h
00h
DEFAULT
Reserved
Fractional (K) part of PLL1 input/output frequency ratio
(treat as one 24-digit binary number).
Reserved
Reserved
Reserved
ALC uses zero cross detection circuit.
0 = Disabled (recommended)
1 = Enabled
Reserved
Reserved
Reserved
Microphone Bias Voltage Control
0 = 0.9 * AVDD
1 = 0.75 * AVDD
Reserved
Auxiliary Input Mode
0 = inverting buffer
1 = mixer (on-chip input resistor bypassed)
Select AUX amplifier output as input PGA signal
source.
0=AUX not connected to input PGA
1=AUX connected to input PGA amplifier negative
terminal.
Connect MICN to input PGA negative terminal.
0=MICN not connected to input PGA
1=MICN connected to input PGA amplifier negative
terminal.
Connect input PGA amplifier positive terminal to MICP
or VMID.
0 = input PGA amplifier positive terminal connected to
VMID
1 = input PGA amplifier positive terminal connected to
MICP through variable resistor string
Reserved
Input PGA zero cross enable:
0=Update gain when gain register changes
1=Update gain on 1
write.
Mute control for input PGA:
0=Input PGA not muted, normal operation
1=Input PGA muted (and disconnected from the
following input BOOST stage).
Input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = 35.25dB
Reserved
Reserved
DESCRIPTION
st
zero cross after gain register
PP, Rev 3.0, December 2008
Master Clock and
Phase Locked
Loop (PLL)
ALC Control 4
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
Input Signal Path
REFER TO
Pre Production
62