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LM93 датащи(PDF) 23 Page - National Semiconductor (TI) |
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LM93 датащи(HTML) 23 Page - National Semiconductor (TI) |
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23 / 92 page ![]() 14.0 SMBus Interface (Continued) 12. The master receives byte 1 and then asserts ACK. 13. The master receives byte 2 and then asserts ACK. 14. The master receives N-3 data bytes, and asserts ACK for each one. 15. The master receives data byte N and asserts a NACK. 16. The master asserts a STOP condition to end the transaction. 1 2 3 45678 910 S Slave Address W A Block Read Command Code (F1h) A Byte Count (2h) A Start Register Address A Byte Count (1–20h) (N) A S Slave Address RA A 11 12 13 14 15 15 16 A Byte Count (1–20h) (N) A Data Byte 1 A Data Byte 2 A A Data Byte N /A P Special Notes: 1. The LM93 returns 00h when address locations outside of normal address space are read. 2. Block reads do not wrap around from address FFh to 00h 3. If the master acknowledges more bytes that it requested, the LM93 continues to supply data until the master does not acknowledge a byte. 4. If the master does not acknowledges a byte to prematurely abort a block read, the LM93 gets off the bus to allow the master to issue a STOP signal. www.national.com 23 |
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