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參數(shù)資料
| 型號： | TLV320AIC13C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO30 |
| 封裝： | PLASTIC, SOP-30 |
| 文件頁數(shù)： | 16/55頁 |
| 文件大?。?/td> | 455K |
| 代理商： | TLV320AIC13C |
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3–10
3.7.2
I2C
Each I2C read-from or write-to AIC13s control register is given by index register address.
Read/write sequence always starts with the first byte as I2C address followed by 0. During second byte,
default/broadcast mode is set and the index register address is initialized. For the write operation control
register, data to be written is given from the third byte onwards. For read operation, stop-start is performed
after the second byte. Now the first byte is I2C address followed by 1. From the second byte onwards, control
register data appears.
Each time read/write is performed, the index register address is incremented so that the next read/write is
performed on the next control register.
During the first write cycle and all write cycles in the broadcast, only the device with address 0000 issues
ACK to the I2C.
I2C Write Sequence
SCL
SDA
A5
A4
A3
A2
A1
A0
0 ACK B7
B6
B5
B4
B3
R2
R1
R0
I2C
6
A6
I2C
5
I2C
4
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
ACK
Programmable 12C Device Address
Set by Control Register 2
Start Bit = 0
SMARTDM Device
Address
(see Table 3-2)
00000 = Default
11111 = Broadcast Mode
Index Register Address
(Index)
Control Register Data for Write
(Index)
Control Register Data for Write
(Index+1)
Figure 3–11. I2C Write Sequence
SCL
SDA
A5
A4
A3
A2
A1
A0
0
ACK
B7
B6
B5
B4
B3
R2
R1
R0
I2C
6
A6
ACK
I2C
5
I2C
4
SCL
SDA
A5
A4
A3
A2
A1
A0
0
ACK
D7
D6
D5
D4
D3
D2
D1
D0
I2C
6
A6
I2C
5
I2C
4
D7
D6
D5
D4
D3
D2
D1
D0
ACK
Start Bit = 0
Programmable 12C Device Address
Set by Control Register 2
SMARTDM Device Address
(see Table 3-2)
Index Register Address
(Index)
Stop Bit = 1
xxxxx = Don’t Care
Start Bit = 0
Programmable 12C Device Address
Set by Control Register 2
SMARTDM Device Address
(see Table 3-2)
Control Register Data
(Index)
Control Register Data
(Index+1)
I2C Read Sequence
Figure 3–12. I2C Read Sequence
Each AIC has an index register address. To perform a write operation, make the LSB of the first byte as 0 (write) (see
Figure 3–13). During the second byte, the index register address is initialized and mode (broadcast/default) is set.
From the third byte onwards, write data to the control register (given by index register) and increment the index
register until stop or repeated start occurs. For operation, make the LSB of the first byte as 1 (read). From the second
byte onwards, AIC starts transmitting data from the control register (given by the index register) and increments the
index register. For setting the index register, perform operation the same as write case for 2 bytes, and then give a
stop or repeated start.
S/Sr –> Start/Repeated Start.
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