參數(shù)資料
型號: TAS3004PFBG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝: GREEN, PLASTIC, TQFP-48
文件頁數(shù): 72/84頁
文件大?。?/td> 671K
代理商: TAS3004PFBG4
A–9
A.6 Programming Instruction for the Loudness Contour
The gain error is less than 0.12 dB, excluding mute.
Device ID
Subaddress
B0(23–0)
B1(23–0)
B2(23–0)
A1(23–0)
A2(23–0)
For example:
Left Loudness Biquad
68
21
001A82
000000
FFE57E
E03550
0FCABB
Right Loudness Biquad
68
22
001A82
000000
FFE57E
E03550
0FCABB
Left Loudness Biquad Gain
Sub
G(23–0)
68
23
04C6D0
Right Loudness Biquad Gain
68
24
04C6D0
A.7 Examples of DRCE
The gain error is less than 0.12 dB (excluding mute).
Table A–9. Example of a DRCE I2C Instruction With DRCE On
BYTE
NUMBER
INSTRUCTION
(HEX)
INSTRUCTION DEFINITION
TABLE
1
68
TAS3004 device identification
2
02
DRC subaddress
3
68
Above-threshold ratio of 5.33:1 with DRCE on
See Table A–11 and Table A–12
4
22
Below-threshold ratio of 1.33:1
See Table A–13 and Table A–14
5
9F
Threshold of –30 dB
See Table A–15
6
B0
Integration interval for energy level detection of 212 ms
See Table A–16
7
60
Attack time constant 6.7 ms
8
A0
Decay time constant 106 ms
A.7.1
DRCE On/Off
The DRCE default mode in the TAS3004 device is off.
The DRCE turns on if all eight bytes in Table A–9 are transmitted and the LSB of the above threshold ratio byte is
0.
The DRCE turns off if all eight bytes in Table A–10 are transmitted and the LSB of the above threshold ratio byte is
1. Table A–10 is identical to Table A–9 except for this third byte.
Table A–10. Example of a DRCE I2C Instruction With DRCE Off
BYTE
NUMBER
INSTRUCTION
(HEX)
INSTRUCTION DEFINITION
TABLE
1
68
TAS3004 device identification
2
02
DRC subaddress
3
69
Above threshold ratio of 5.33:1 with DRCE off
See Table A–11 and Table A–12
4
22
Below threshold ratio of 1.33:1
See Table A–13 and Table A–14
5
9F
Threshold of –30 dB
See Table A–15
6
B0
Integration interval for energy level detection of 212 ms
See Table A–16
7
60
Attack time constant 6.7 ms
8
A0
Decay time constant 106 ms
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