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參數(shù)資料
| 型號： | TC9488F |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO30 |
| 封裝： | 0.375 INCH, 1 MM PITCH, PLASTIC, SSOP-30 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 313K |
| 代理商： | TC9488F |
TC9455,88F/N
2002-02-05
6
4.
Electronic volume controllers
The IC incorporates microphone input 1 (MIC1) and microphone input 2 (MIC2) volume and echo volume
controllers. The built-in volume controller operates in 16 steps. Using an external variable resistor, volume
can be controlled by the DC level or from the MCU using serial data.
The TC9455F/N supports an I2C bus interface; the TC9488F/N, a three-lead interface.
4.1
Serial control timing
Figure 4 shows the serial control timing.
Figure 4
Serial control timing
Table 1 lists bits used to set the volume.
Table 1
Volume setting bits
M3, M2, M1, M0: Volume setting data
MODE
DA7
DA6
DA5
DA4
DA3
DA2
DA1
DA0
VOL1 setting
M3
M2
M1
M0
0
VOL2 setting
M3
M2
M1
M0
0
1
0
VOL3 setting
M3
M2
M1
M0
1
0
VOL1, 2, 3 setting
M3
M2
M1
M0
1
0
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