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92HD99B Datasheet, PDF (206/225 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM
92HD99
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
7.29.1.1. SPKVOL L/R Registers
Prior to WC revision, this register reset by POR/DAFG/ULR. WC revision, reset by POR only. Writing
to NID22h verb 77F will cause reset on all silicon revisions.
Register Address
Bit
Label
verb F71/771 (Left)
verb F72/772 (Right)
verb 773 (Left and Right -
7:0
write only)
VOL[7:0]
Type Default
Description
RW 30
+36 to -91.5dB in 0.75dB steps
0x00 = +36dB
0x01 = +35.25dB
...
0x2F = +0.75dB
0x30 = 0dB
0x31 = -0.75dB
...
0xA9 = -90.75
0xAA to 0xFE = -91.5dB
0xFF = mute
7.29.1.2. PWRM Register
Prior to WC revision, this register reset by POR/DAFG/ULR. WC revision, reset by POR only. Writing
to NID22h verb 77F will cause reset on all silicon revisions.
Register Address
verb F79/779
Bit
Label
7
RSVD
6
RSVD
5
RSVD
4
HPPWD
3
SPKRON
2
DMICPWD
1
RSVD
0
RSVD
Type Default
Description
RO 0
Reserved
RO 0
Reserved
RO 0
Reserved
RW 0
Headphone ports are forced off in Aux Audio Mode (including
charge pump)
RW 0
BTL (port D) is forced on in Aux Audio Mode
RW 0
DMIC powered down in Aux Audio Mode (including DAC)
RW 0
Reserved
RW 0
Reserved
IDT CONFIDENTIAL
206
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92HD99