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TAS2564 Datasheet(PDF) 21 Page - Texas Instruments |
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TAS2564 Datasheet(HTML) 21 Page - Texas Instruments |
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21 / 118 page  A6 A0 ACK Acknowledge I2CDeviceAddressand Read/WriteBit R/W A6 A0 R/W ACK A0 ACK D7 D0 ACK Start Condition Stop Condition Acknowledge Acknowledge Acknowledge LastDataByte ACK FirstDataByte RepeatStart Condition Not Acknowledge I2CDeviceAddressand Read/WriteBit Register OtherDataBytes A7 A6 A5 D7 D0 ACK Acknowledge D7 D0 A6 A5 A0 R/W ACK A7 A6 A5 A4 A0 ACK A6 A5 A0 ACK Start Condition Stop Condition Acknowledge Acknowledge Acknowledge I2CDeviceAddressand Read/WriteBit Register DataByte D7 D6 D1 D0 ACK I2CDeviceAddressand Read/WriteBit Not Acknowledge R/W A1 A1 RepeatStart Condition Register 21 TAS2564 www.ti.com SLASEI6A – OCTOBER 2019 – REVISED DECEMBER 2019 Product Folder Links: TAS2564 Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated Figure 30. Multi-Byte Write Transfer 8.3.7 Single-Byte Read As shown in Figure 31, 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 TAS2564 address and the read/write bit, the device responds with an acknowledge bit. The master then sends the internal memory address byte, after which the device issues an acknowledge bit. The master device transmits another start condition followed by the TAS2564 address and the read/write bit again. This time, the read/write bit is set to 1, indicating a read transfer. Next, the TAS2564 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. Figure 31. Single-Byte Read Transfer 8.3.8 Multiple-Byte Read A multiple-byte data-read transfer is identical to a single-byte data-read transfer except that multiple data bytes are transmitted by the TAS2564 to the master device as shown in Figure 32. With the exception of the last data byte, the master device responds with an acknowledge bit after receiving each data byte. Figure 32. Multi-Byte Read Transfer 8.3.9 Register Organization Device configuration and coefficients are stored using a page and book scheme. Each page contains 128 bytes and each book contains 256 pages. All device configuration registers are stored in book 0, page 0, which is the default setting at power up (and after a software reset). The book and page can be set by the BOOK[7:0] and PAGE[7:0] registers respectively. |
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