92HD91 Datasheet, PDF (284/298 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD91
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
7.29.1.20. BTL High-Pass Filter COEF_SEL 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
Bit
Label
7:3 Reserved
verb F95/795
2:0 hp_coef_sel
Type Default
Description
RO 0
RESERVED
RW 0x2
Select IIR coefficients for BTL amplifier high pass filter corner
frequency
000 = 100Hz
001 = 200Hz
010 = 300Hz
011 = 400Hz
100 = 500Hz
101 = 750Hz
110 = 1000Hz
111 = 2000Hz
7.29.1.21. Mono Band-Pass Filter COEF_SEL 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
Bit
Label
7
Reserved
verb F96/796
6:4 bph_coef_sel
3
Reserved
2:0 bpl_coef_sel
Type Default
Description
RO 0
RESERVED
RW 0x3
Select IIR coefficients for MonoOut band-pass filter lower
corner frequency
000 = 63Hz
001 = 80Hz
010 = 100Hz
011 = 120Hz
100 = 150Hz
101 = 200Hz
110 = 315Hz
111 = 400Hz
RO 0
RESERVED
RW 0x2
Select IIR coefficients for MonoOut band-pass filter upper
corner frequency
000 = 150Hz
001 = 200Hz
010 = 250Hz
011 = 315Hz
100 = 400Hz
101 = 500Hz
110 = 630Hz
111 = 800Hz
IDT CONFIDENTIAL
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92HD91