92HD90B0X5NLGXYAX8 IDT, 92HD90B0X5NLGXYAX8 Datasheet - Page 285

• Manufacturer Part Number: 92HD90B0X5NLGXYAX8
• Description: Interface - CODECs
• Manufacturer: IDT

Specifications of 92HD90B0X5NLGXYAX8

• Rohs: yes
• Part # Aliases: IDT92HD90B0X5NLGXYAX8

92HD98
SINGLE CHIP PC AUDIO SYSTEM, CODEC+MONO SPEAKER AMPLIFIER+CAPLESS HP+LDO
IDT CONFIDENTIAL
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
These 8-bit registers set the timer values between incrementing/decrementing the Compressor attenuation values. There is
one register each for Attack, Hold, and Release times, the configuration parameters are the same for all three and are
shown in the table below.
Prior to WC revision, these registers reset by POR/DAFG/ULR. WC revision, reset by POR only. Writing to NID22h verb
77F will cause reset on all silicon revisions..
These 16-bit registers set the threshold values. When in attack phase and the Attack Threshold is exceeded the
Compressor attenuation is incremented by stepsize (see LMTCTRL). When in release phase and the Release Threshold is
not exceeded the Compressor attenuation is incremented by stepsize (but not above 0)
Prior to WC revision, these registers reset by POR/DAFG/ULR. WC revision, reset by POR only. Writing to NID22h verb
77F will cause reset on all silicon revisions..
verb F88/788
verb F89/789
verb F8A/78A
verb F8B/78B
verb F8C/78C
Register Address
Register Address
Register Address
Register Address
Register Address
7.29.1.15. LMTCTRL Register
Control operation of the volume Limiter (Compressor).
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.
7.29.1.16. LMTATKTIME (0x19), LMTHOLDTIME (0x1A), LMTRELTIME (0x1B) Registers
7.29.1.17. LMTATKTH (0x1D–LO, 0x1C–HI), LMTRELTH (0x1F–LO, 0x1E–HI) Registers
7:4
3
2:1
0
7
6:0
7
6:0
7
6:0
7:0
Bit
Bit
Bit
Bit
Bit
LMTRT[6:0]
LATKTH[15:8]
–
zerocross
stepsize
limiter_en
ATK10ms
LMTAT[6:0]
HOLD10ms
LMTHT[6:0]
REL10ms
Label
Label
Label
Label
Label
RO
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Type Default
Type Default
Type
Type
Type Default
0
0
0
0
0
0
0
0
0
0
7F
Default
Default
285
1 = value in bits 6:0 is in 10ms units, otherwise 1ms units.
Timer value in units of 1 or 10ms.
8’hFF would equal threshold level of +2.0dB. Each step below
this 8-bit full scale value reduces threshold level by 0.0078 dB.
Reserved for future use.
1 = only change limiter gain value on zero cross.
Gain stepsize when incrementing or decrementing:
0 - 0.75 dB, 1 - 1.5 dB, 2 - 3.0 dB, 3 - 6.0 dB
1 = enable limiter (compressor)
1 = value in bits 6:0 is in 10ms units, otherwise 1ms units.
Timer value in units of 1 or 10ms.
1 = value in bits 6:0 is in 10ms units, otherwise 1ms units.
Timer value in units of 1 or 10ms.
Description
Description
Description
Description
Description
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92HD98