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LTM4676A Datasheet(PDF) 86 Page - Linear Technology |
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LTM4676A Datasheet(HTML) 86 Page - Linear Technology |
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86 / 136 page  LTM4676A 86 4676afa For more information www.linear.com/LTM4676A appenDix c: pMbus coMManD DeTails ADDRESSING AND WRITE PROTECT COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED DATA FORMAT UNITS NVM DEFAULT VALUE PAGE 0x00 Channel (page) presently selected for any paged command. R/W Byte N Reg 0x00 PAGE_PLUS_WRITE 0x05 Write a command directly to a specified page. W Block N PAGE_PLUS_READ 0x06 Read a command directly from a specified page. Block R/W Process N WRITE_PROTECT 0x10 Protect the device against unintended PMBus modifications. R/W Byte N Reg Y 0x00 MFR_ADDRESS 0xE6 Specify right-justified 7-bit device address. R/W Byte N Reg Y 0x4F MFR_RAIL_ADDRESS 0xFA Specify unique right-justified 7-bit address for channels comprising a PolyPhase output. R/W Byte Y Reg Y 0x80 Related commands: MFR_COMMON. PAGE The PAGE command provides the ability to configure, control and monitor both PWM channels through only one physical address, either the MFR_ADDRESS or GLOBAL device address. Each PAGE contains the operating memory for one PWM channel. Pages 0x00 and 0x01 correspond to channel 0 and channel 1, respectively, in this device. Setting PAGE to 0xFF applies any following paged commands to both outputs. With PAGE set to 0xFF the LTM4676A will respond to read commands as if PAGE were set to 0x00 (channel 0 results). This command has one data byte. PAGE_PLUS_WRITE The PAGE_PLUS_WRITE command provides a way to set the page within a device, send a command and then send the data for the command, all in one communication packet. Commands allowed by the present write protection level may be sent with PAGE_PLUS_WRITE. The value stored in the PAGE command is not affected by PAGE_PLUS_WRITE. If PAGE_PLUS_WRITE is used to send a non-paged command, the Page Number byte is ignored. This command uses Write Block protocol. An example of the PAGE_PLUS_WRITE command with PEC sending a com- mand that has two data bytes is shown in Figure 63. SLAVE ADDRESS PAGE_PLUS COMMAND CODE BLOCK COUNT (= 4) W A A S 7 8 8 1 PAGE NUMBER 8 1 1 1 1 1 A A … COMMAND CODE 8 1 A UPPER DATA BYTE A A P 4676A F57 A 8 8 1 1 1 1 PEC BYTE LOWER DATA BYTE 8 Figure 63. Example of PAGE_PLUS_WRITE |
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