wm9090 Wolfson Microelectronics plc, wm9090 Datasheet - Page 18

• Manufacturer Part Number: wm9090
• Description: Ultra Low Power Audio Subsystem
• Manufacturer: Wolfson Microelectronics plc

WM9090
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Table 3 Input PGA Volume Control
R27 (1Bh)
IN2 Line Input
B Volume
REGISTER
ADDRESS
BIT
2:0
2:0
6
8
7
6
IN2A_ZC
IN2A_VOL
[2:0]
IN2_VU
IN2B_MUTE
IN2B_ZC
IN2B_VOL
[2:0]
LABEL
DEFAULT
011
N/A
011
0
1
0
IN2A PGA Zero Cross Control
0 = Change gain immediately
1 = Change gain on zero cross only
IN2A Volume (differential mode)
000 = -6dB
001 = -3.5dB
010 = 0dB
011 = +3.5dB
100 = +6dB
101 = +12dB
110 = +18dB
111 = +18dB
IN2A Volume (single-ended mode)
000 = 0dB
001 = +2.5dB
010 = +6dB
011 = +9.5dB
100 = +12dB
101 = +18dB
110 = +24dB
111 = +24dB
Input PGA Volume Update
Writing a 1 to this bit will cause IN2A and
IN2B input PGA volumes to be updated
simultaneously
IN2B PGA Mute
0 = Un-Mute
1 = Mute
IN2B PGA Zero Cross Control
0 = Change gain immediately
1 = Change gain on zero cross only
IN2B Volume (differential mode)
000 = -6dB
001 = -3.5dB
010 = 0dB
011 = +3.5dB
100 = +6dB
101 = +12dB
110 = +18dB
111 = +18dB
IN2B Volume (single-ended mode)
000 = 0dB
001 = +2.5dB
010 = +6dB
011 = +9.5dB
100 = +12dB
101 = +18dB
110 = +24dB
111 = +24dB
DESCRIPTION
PP, January 2010, Rev 3.0
Pre-Production
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