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参数资料
| 型号： | TPA5051RSATG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC16 |
| 封装： | 4 X 4 MM, GREEN, PLASTIC, QFN-16 |
| 文件页数： | 22/23页 |
| 文件大小： | 812K |
| 代理商： | TPA5051RSATG4 |
www.ti.com
SINGLE-BYTE WRITE
A6
A5
A4
A3
A2
A1
A0
R/W ACK A7
A6
A5
A4
A3
A2
A1
A0 ACK
D7
D6
D5
D4
D3
D2
D1
D0
ACK
Start
Condition
Stop
Condition
Acknowledge
I2CDeviceAddressand
Read/WriteBit
Register
DataByte
MULTIPLE-BYTE WRITE AND INCREMENTAL MULTIPLE-BYTE WRITE
Register
SINGLE-BYTE READ
SLOS497A – JUNE 2006 – REVISED JULY 2006
The TPA5051 supports sequential I2C addressing. For write transactions, if a register is issued followed by data
for that register and all the remaining registers that follow, a sequential I2C write transaction has taken place. For
I2C sequential write transactions, the register issued then serves as the starting point, and the amount of data
subsequently transmitted, before a stop or start is transmitted, determines to how many registers are written.
As shown is Figure 6, a single-byte data write transfer begins with the master device transmitting a start
condition followed by the I2C device address and the read/write bit. The read/write bit determines the direction of
the data transfer. For a write data transfer, the read/write bit must be set to 0. After receiving the correct I2C
device address and the read/write bit, the TPA5051 responds with an acknowledge bit. Next, the master
transmits the register byte corresponding to the TPA5051 internal memory address being accessed. After
receiving the register byte, the TPA5051 again responds with an acknowledge bit. Next, the master device
transmits the data byte to be written to the memory address being accessed. After receiving the data byte, the
TPA5051 again responds with an acknowledge bit. Finally, the master device transmits a stop condition to
complete the single-byte data write transfer.
Figure 6. Single-Byte Write Transfer
A multiple-byte data write transfer is identical to a single-byte data write transfer except that multiple data bytes
are transmitted by the master device to the TPA5051 as shown in Figure 7. After receiving each data byte, the
TPA5051 responds with an acknowledge bit.
Figure 7. Multiple-Byte Write Transfer
As shown in Figure 8, a single-byte data read transfer begins with the master device transmitting a start
condition followed by the I2C device address and the read/write bit. For the data read transfer, both a write
followed by a read are actually done. Initially, a write is done to transfer the address byte of the internal memory
address to be read. As a result, the read/write bit is set to a 0.
After receiving the TPA5051 address and the read/write bit, the TPA5051 responds with an acknowledge bit.
The master then sends the internal memory address byte, after which the TPA5051 issues an acknowledge bit.
The master device transmits another start condition followed by the TPA5051 address and the read/write bit
again. This time the read/write bit is set to 1, indicating a read transfer. Next, the TPA5051 transmits the data
byte from the memory address being read. After receiving the data byte, the master device transmits a
not-acknowledge followed by a stop condition to complete the single-byte data read transfer.
8
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