92HD99B Datasheet, PDF (213/225 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD99
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
7.29.1.20. 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. BTL Class-D Power Stage Register Settings
Prior to WC revision, these registers reset by POR/DAFG/ULR. WC revision, reset by POR only.
Writing to NID22h verb 77F will cause NOT generate a reset.
Register Address
Bit
Label
7
ENABLE
6
TRC_ESD
5
STRENDRV
verb F97/797
4:3 SCTHR
2:0 DEADTIME
Type Default
Description
RW 1
1 = Enable BTL Power stage
RO 0
1 = ESD trigger detected
0 = No trigger
RW 0
1 = Strengthen pre-drive
0 = Normal
RW 01
Short circuit threshold current
00 = 10% of PVDD
01 = 14% of PVDD
10 = 16% of PVDD
11 = 20% of PVDD
RW 001
Dead time for output FETs
000 = 0.5ns
001 = 1.0ns
010 = 1.5ns
011 = 2ns
100 = 4ns
101 = 8ns
110 = 8ns
111 = 8ns
IDT CONFIDENTIAL
213
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92HD99