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TPS658620ZQZT датащи(PDF) 31 Page - Texas Instruments |
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TPS658620ZQZT датащи(HTML) 31 Page - Texas Instruments |
31 / 104 page 3.10 ONE BYTE WRITE (SDAT/SCLK, PSDAT/PSCLK) 3.11 VALID READ SEQUENCES (SDAT/SCLK ONLY) 3.12 VALID READ SEQUENCES (SDAT/SCLK ONLY) 3.13 NON-VALID SEQUENCES TPS658620 Advanced Power Management Unit www.ti.com SLVS993 – OCTOBER 2009 The TPS658620 will always ACK its own address. If CMD points to an allowable READ or WRITE address, the device writes the address into its RAM address register and sends an ACK. If CMD points to a non-allowed address, the device does NOT write the address into its RAM address register and sends a NACK. S hA0 bqA S hA0 bqA hCMD bqA S hA0 bqA hCMD_N bqN The data is written to the addressed register at the end of the bq ACK, ending the one byte write sequence when the RAM address and the data byte are stored in the I2C registers. The host can cancel a WRITE by sending a STOP or START before the trailing edge of the ACK clock pulse. S hA0 bqA hCMD bqA hDATA bqA The TPS658620 will always ACK its own address. S hA1 bqA Upon receiving hA1, TPS658620 starts at the current location of the RAM address register. The START and the STOP both act as priority interrupts. If the host has been interrupted and is not sure where it left off, it can send a STOP and reset the TPS658620 state machine to the WAIT state; once in the WAIT state, the TPS658620 will ignore all activity on the SCLK and SDAT lines until it receives a START. A repeated START and START in the I2C specification are both treated as a START. S hA0 bqA hCMD bqA P S hA0 bqA hCMD bqA S hA1 bqA bqDATA hN P S hA1 bqA bqDATA hN P Incremental read sequences S hA1 bqA bqData hA bqDATA hA . . . bqDATA hN P START and non-hA0 or non-hA1 Address: A START followed by an address which is not hA0 or hA1 will be NACKED. S hA_1 bqN Attempt to Specify Non-Allowed READ Address If the CMD points to a non-allowed READ address (reserved registers), bq will send a NACK back to the host and it will not load the address in the RAM address register. Note that the TPS658620 NACKS whether a stop is sent or not. S hA0 bqA hCMD_N bqA P S hA0 bqA hCMD_N bqN Submit Documentation Feedback DETAILED DESCRIPTION 31 |
Аналогичный номер детали - TPS658620ZQZT |
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Аналогичное описание - TPS658620ZQZT |
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