W681307 Datasheet, PDF (104/160 Pages) Winbond – USB1.1 CODEC Microprocessor Control Unit with 32KB Mask ROM and 4KB RAM

W681307
13.4.7.3
Address
0x14ED
VD Soft Clip Low Index
Access Mode Value At Reset Nominal Value
R/W
0x00
0x06
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESERVED RESERVED
VDSC_Low_Index[5:0]
VDSC_Low_Index[5:0] is used to control the gain of vd soft_clip module at low mode. The gain selection range is the same as "VD Soft
Clip Normal Index".
13.4.7.4
VD Soft Clip Threshold
Address
Access Mode Value At Reset Nominal Value
0x14EE - 0x14EF
R/W
0x0400
0x4000
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
EE
VDSC_Threshold
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
EF
VDSC_Threshold
VDSC_Threshold is used to determine the selection of Soft Clip gain. When the input network power is larger then VDSC_Threshold,
VDSC_Low_Index gain is used, otherwise VDSC_Normal_Index gain is used.
13.4.7.5
Address
0x14F0
ShortTermPreNetworkPowerAttackTC
Access Mode Value At Reset Nominal Value
R/W
0x07
0x0B
Bit 7
RESERVED
Bit 6
RESERVED
Bit 5
RESERVED
Bit 4
RESERVED
Bit 3
Bit 2
Bit 1
Bit 0
ShortTermPreNetworkPowerAttackTC[3:0]
ShortTermPreNetworkPowerAttackTC[3:0] is the time constant which is used to calculate the short term network power for VD Soft Clip.
13.4.7.6
Address
0x14F1
VDSC Attack TC
Access Mode Value At Reset Nominal Value
R/W
0x07
0x05
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESERVED RESERVED RESERVED RESERVED
VDSC_AttackTC[3:0]
When soft clip gain is switched between normal and low, an embedded smoothing function is used to smooth the gain change.
VDSC_AttackTC[3:0] is a time constant to control the smoothing speed.
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Publication Release Date: May, 2007
Revision 1.3