參數(shù)資料
型號(hào): TS4975EIJT
廠商: STMICROELECTRONICS
元件分類: 音頻控制
英文描述: 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA12
封裝: LEAD FREE, FLIP CHIP, 12 PIN
文件頁(yè)數(shù): 16/36頁(yè)
文件大?。?/td> 870K
代理商: TS4975EIJT
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
TS4975
Application Information
23/36
All bytes are sent with MSB bit first. The transfer of written data ends with a “stop” message.
When transmitting several data, the data can be written with no need to repeat the “start”
message and addressing byte with the slave address.
In order to read data from the TS4975, after the “start” message, the MCU must send and
receive the following data:
send byte with the IC 7-bit slave address and with a high level for the R/W bit
receive the data (control register value)
All bytes are read with MSB bit first. The transfer of read data is ended with “stop” message.
When transmitting several data, the data can be read with no need to repeat the “start”
message and the byte with slave address. In this case the value of control register is read
repeatedly.
When the thermo shutdown or pop and click reduction is active, specific values are read from
the TS4975 (see
Section 4.9: Pop and click performance on page 31 and Section 4.10: Thermo
shutdown on page 32).
Figure 59. IC write/read operations
Table 10.
Ouput mode selection: G from -34 dB to + 18dB (by steps of 4dB)(1)
1.
SD = Shutdown Mode
In1 = Audio Input 1
In2= Audio Input2
G = Gain from Audio Input 1and Input 2 to Output1 and Output2
Output Mode #
Headphone Output 1
Headphone Output 2
0SD
SD
1
G x In1
G x In2
2
G x In2
G x In1
3
G x In1
4
G x In2
5SD
G x In1
6SD
G x In2
7
G x In1
SD
8
G x In2
SD
SDA
S1
1
0
A0
0
A
1
D7 D6 D5 D4
D2
D3
D0
D1
A
P
Start condition
SLAVE ADDRESS
CONTROL REGISTERS
R/W
Acknowledge
from Slave
Acknowledge
from Slave
Stop condition
Volume Control
settings
Output
Mode settings
Phantom Ground
settings
SDA
S1
1
0
A0
0
A
1
D7 D6 D5 D4
D2
D3
D0
D1
A
P
S1
1
0
A0
0
A
1
D7 D6 D5 D4
D2
D3
D0
D1
A
P
Start condition
SLAVE ADDRESS
CONTROL REGISTERS
R/W
Acknowledge
from Slave
Acknowledge
from Slave
Stop condition
Volume Control
settings
Output
Mode settings
Phantom Ground
settings
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