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ISL68134IRAZ датащи(PDF) 21 Page - Renesas Technology Corp |
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ISL68134IRAZ датащи(HTML) 21 Page - Renesas Technology Corp |
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21 / 50 page ![]() ISL68134 FN8817 Rev.1.00 Page 21 of 50 Jun 19, 2017 PMBus Protocol S Slave Address_0 1 7 + 1 Command Code 1 8 Low Data Byte High Data Byte PEC A 1 8 A 1 8 A 1 8 A 1 A 1 P S Slave Address_0 7 + 1 Command Code 1 8 A 1 A PEC 8 1 A 1 P Optional 9 Bits for SMBus/PMBus 1. Send Byte Protocol 2. Write Byte/Word Protocol S Slave Address_0 1 7 + 1 Command Code 1 8 A 1 8 A 1 8 A 1 8 A 1 N 1 P 3. Read Byte/Word Protocol RS Slave Address_1 1 7 + 1 Example command: 03h Clear Faults Example command: 21h VOUT_COMMAND NOT used in I2C Optional 9 Bits for SMBus/PMBus NOT used in I2C Optional 9 Bits for SMBus/PMBus NOT used in I2C Example command: 8B READ_VOUT (Two words, read voltage of the selected rail). S: Start Condition A: Acknowledge (“0”) N: Not Acknowledge (“1”) RS: Repeated Start Condition P: Stop Condition PEC: Packet Error Checking R: Read (“1”) W: Write (“0”) 5. Alert Response Address (ARA, 0001_1001, 25h) for SMBus and PMBus, not used for I2C S ALERT Addr_1 1 7 + 1 1 7+1 A 1 A 8 1 A 1 P Optional 9 Bits for SMBus/PMBus NOT used in I2C 1 A Data Byte PEC 8 1 8 1 A 4. Group Command Protocol - No more than one command can be sent to the same Address S Slave ADDR2_0 1 7 + 1 1 A S Slave ADDR1_0 1 7 + 1 Command Code 1 8 Low Data Byte High Data Byte PEC A 1 8 A 1 8 A 1 8 A 1 A Low Data Byte High Data Byte PEC 8 1 8 A 1 8 A 1 A 1 P RS Slave ADDR3_0 1 7 + 1 Optional 9 Bits for SMBus/PMBus 1 A NOT used in I2C Not Used for One Byte Word Read Not Used for One Byte Word Slave_Address_1 PEC Low Data Byte High Data Byte PEC Command Code 8 1 A Command Code 8 A (This will clear all of the bits in Status Byte for the selected Rail) Acknowledge or DATA from Slave, ISL68134 Controller STOP (P) bit is NOT allowed before the repeated START condition when “reading” contents of a register. A A |
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