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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TPS658621A датащи(PDF) 30 Page - Texas Instruments |
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TPS658621A датащи(HTML) 30 Page - Texas Instruments |
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30 / 107 page  TPS658621A SLVSA58 – DECEMBER 2009 www.ti.com 3.7 I 2C COMMUNICATION PROTOCOL The following conventions will be used when describing the communication protocol: CONDITION CODE START sent from host S STOP sent from host P TPS658621A I2C slave address sent from host (WRITE) hA0 TPS658621A register address sent from TPS658621A (READ) hA1 Non-valid I2C slave address sent from host hA_N Valid TPS658621A register address sent from host HCMD Non-valid TPS658621A register address sent from host HCMD_N I/O data byte (8 bits) sent from host to TPS658621A hDATA I/O data byte (8 bits) sent from TPS658621A to host bqDATA Acknowledge (ACK) from host hA Not acknowledge (NACK) from host hN Acknowledge (ACK) from TPS658621A bqA Not acknowledge (NACK) from TPS658621A bqN Figure 3-1. I2C Conditions For normal data transfers, the data line (SDAT or PSDAT) is allowed to change only when the clock line (SCLK or PSCLK) is low, and one clock pulse is used per bit of data. The data line must remain stable whenever the clock line is high, as data changes when the clock is high are reserved for indicating the start and stop conditions. Each data transfer is initiated with a start condition and terminated with a stop condition. When addressed, the TPS658621A device generates an acknowledge bit after the reception of each byte by pulling the data line Low. The master device (microprocessor) must generate an extra clock pulse that is associated with the acknowledge bit. After the acknowledge/not acknowledge bit, the TPS658621A leaves the data line high, enabling a STOP condition generation. 3.8 I 2C READ AND WRITE OPERATIONS The TPS658621A supports the standard I2C one byte Write. The basic I2C read protocol has the following steps: 1. Host sends a start and sends TPS658621A address 30 DETAILED DESCRIPTION Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TPS658621A |
Аналогичный номер детали - TPS658621A |
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Аналогичное описание - TPS658621A |
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