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參數(shù)資料
| 型號： | TDA7448 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻控制 |
| 英文描述： | 6 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO20 |
| 封裝： | SO-20 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 381K |
| 代理商： | TDA7448 |
TDA7448
6/14
5
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
■
A start condition (S)
■
A chip address byte, containing the TDA7448 address
■
A subaddress bytes
■
A sequence of data (N byte + acknowledge)
■
A stop condition (P))
ACK = Acknowledge;
S = Start;
P = Stop;
A = Address;
B = Auto Increment
5.1 EXAMPLES
5.1.1 No Incremental Bus
The TDA7448 receives a start condition, the correct chip address, a subaddress with the B = 0 (no incremental
bus), N-data (all these data concern the subaddress selected), a stop condition.
5.1.2 Incremental Bus
The TDA7448 receivea start conditions, the correct chip address, a subaddress with the B = 1 (incremental bus):
now it is in a loop condition with an autoincrease of the subaddress whereas SUBADDRESS from "XXX1000"
to "XXX1111" of DATA are ignored.The DATA 1 concern the subaddress sent, and the DATA 2 concern the
subaddress sent plus one in the loop etc, and at the end it receivers the stop condition.
5.2 DATA BYTES
Address= 88 (HEX) (10001000): ADDR open; 8A (HEX) (10001010): connect to supply
Table 6. FUNCTION SELECTION: subaddress
B=1: INCREMENTAL BUS; ACTIVE
B=0: NO INCREMENTAL BUS
X= DON’T CARE
MSB
LSB
SUBADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
X
B
0
SPEAKER ATTENUATION OUT 1
X
B
0
1
SPEAKER ATTENUATION OUT 2
X
B
0
1
0
SPEAKER ATTENUATION OUT 3
X
B
0
1
SPEAKER ATTENUATION OUT 4
X
B
0
1
0
SPEAKER ATTENUATION OUT 5
X
B
0
1
0
1
SPEAKER ATTENUATION OUT 6
X
B
01
10
NOT USED”
X
B
01
11
NOT USED
S
1
0
1
0
ACK
DATA
ACK
P
MSB
LSB
MSB
LSB
MSB
LSB
CHIP ADDRESS
D96AU420
X
DATA
SUBADDRESS
DATA 1 to DATA n
X
B
S
1
0
1
0
ACK
DATA
ACK
P
MSB
LSB
MSB
LSB
MSB
LSB
CHIP ADDRESS
D96AU421
X
D3
SUBADDRESS
DATA
X
0
D2 D1 D0
S
1
0
1
0
ACK
DATA
ACK
P
MSB
LSB
MSB
LSB
MSB
LSB
CHIP ADDRESS
D96AU422
X
D3
SUBADDRESS
DATA 1 to DATA n
X
1
D2 D1 D0
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| TDA7448_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:6 CHANNEL VOLUME CONTROLLER |
| TDA744813TR | 功能描述:音頻放大器 6 Ch Volume CNTRL 0 to -79dB 1.0dB CNT RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7448-EVB | 功能描述:音頻 IC 開發(fā)工具 Eval Brd for TDA7448 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TDA7449 | 功能描述:音頻 DSP Tone Control Digital RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7449_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR |
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