參數(shù)資料
型號: TDA7440D
廠商: STMICROELECTRONICS
元件分類: 音頻控制
英文描述: 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28
封裝: SO-28
文件頁數(shù): 17/17頁
文件大?。?/td> 735K
代理商: TDA7440D
9/17
TDA7440
5.2 POWER ON RESET CONDITION
Table 6.
5.3 DATA BYTES
Address = 88 HEX (ADDR:OPEN).
Table 7. FUNCTION SELECTION: First byte (subaddress)
B = 1: INCREMENTAL BUS ACTIVE
B = 0: NO INCREMENTAL BUS
X = DON’T CARE
In Incremental Bus Mode, the "not used" function must be addressed in any case. For example to refresh
"Volume = 0dB" and Speaker_R = -40dB", the following bytes must be sent:
Table 8.
Table 9. INPUT SELECTION
INPUT SELECTION
IN2
INPUT GAIN
28dB
VOLUME
MUTE
BASS
0dB
TREBLE
2dB
SPEAKER
MUTE
MSB
LSB
SUBADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
X
B
0
INPUT SELECT
XX
XB
0
1
INPUT GAIN
XX
XB
0
1
0
VOLUME
XX
XB
0
1
BASS
XX
XB
0
1
0
NOT USED
XX
XB
0
1
0
1
TREBLE
X
B
0
1
0
SPEAKER ATTENUATE "R"
X
B
0
1
SPEAKER ATTENUATE "L"
SUBADDRESS
XXX10010
VOLUME DATA
X0000000
BUS DATA
XXXX1111
NOT USED DATA
XXXX1111
TREBLE DATA
XXXX1111
SPEAKER_R DATA
X0000010
MSB
LSB
INPUT MULTIPLEXER
D7
D6
D5
D4
D3
D2
D1
D0
XXXXXX
0
IN4
XXXXXX
0
1
IN3
XXXXXX
1
0
IN2
XXXXXX
1
IN1
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