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TPA5051RSATG4 데이터시트(PDF) 8 Page - Texas Instruments |
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TPA5051RSATG4 데이터시트(HTML) 8 Page - Texas Instruments |
8 / 21 page 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 Acknowledge Acknowledge I2CDeviceAddressand Read/WriteBit Register DataByte MULTIPLE-BYTE WRITE AND INCREMENTAL MULTIPLE-BYTE WRITE Register SINGLE-BYTE READ TPA5051 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 Submit Documentation Feedback |
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