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LTM4676A Scheda tecnica(PDF) 45 Page - Linear Technology |
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LTM4676A Scheda tecnica(HTML) 45 Page - Linear Technology |
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45 / 136 page  LTM4676A 45 4676afa For more information www.linear.com/LTM4676A pMbus coMManD suMMary Table 1. Summary of Supported Commands and Feature Differences Between the LTM4676A and the LTM4676 (Items of Greatest Significance Indicated by Gray-Shaded Cells; Common Commands, Values and Attributes Indicated by Non-Shaded, Merged Cells) PMBus COMMAND NAME, OR FEATURE CMD CODE (REGISTER) COMMAND OR FEATURE DESCRIPTION LTM4676A NVM FACTORY-DEFAULT VALUE AND/OR ATTRIBUTES LTM4676 NVM FACTORY-DEFAULT VALUE AND/OR ATTRIBUTES PAGE MFR_CHAN_ CONFIG_*n 0xD0 Channel-specific configuration bits. No difference: 0x1F, read/write, paged, stored in user-editable NVM. Register is named “MFR_CHAN_CONFIG” and referred to as “MFR_CHAN_ CONFIG_LTM467X” in LTpowerPlay. 88 MFR_CONFIG_ ALL_* 0xD1 Global configuration bits, i.e., common to both VOUT channels 0 and 1. Same as LTM4676 except: Bit 4 configures whether the SYNC drive circuit is active (0b) or inactive (1b); Bit 3 configures whether the Stuck PMBus Timer Timeout is 150ms for Block Reads and 32ms for Non- Block Reads (0b) or 250ms for all Reads (1b). 0x09, read/write, non-paged, stored in user-editable NVM. Register is named “MFR_CONFIG_ALL” and referred to as “MFR_CONFIG_ALL_ LTM467X” in LTpowerPlay. Bit 4 is reserved. 89 MFR_GPIO_ PROPAGATE_*n 0xD2 Configuration bits for propagating faults to the GPIOn pins. No difference: 0x6893, read/write, paged, stored in user-editable NVM. Register is named “MFR_GPIO_PROPAGATE” and referred to as “MFR_ GPIO_PROPAGATE_LTM467X” in LTpowerPlay. 110 MFR_PWM_ MODE_*n 0xD4 Configuration for the PWM engine of each VOUT channel. 0xC1, read/write, paged, stored in user-editable NVM. Bit 1 commands whether the output is in high range (0b) or low range (1b). Bit 0 commands whether the output is operating in Forced Continuous Conduction Mode (1b) or Discontinuous Mode (0b). Command is named MFR_ PWM_MODE and referred to as MFR_PWM_MODE_LTM467X in LTpowerPlay. 0xC2, read/write, paged, stored in user-editable NVM. Bits 1:0 command the operating mode of the output. Command is named MFR_PWM_MODE and referred to as MFR_PWM_MODE_ LTM467X in LTpowerPlay. 91 MFR_GPIO_ RESPONSEn 0xD5 Action to be taken by the device when the GPIOn pin is asserted low by circuitry external to the unit. No difference: 0xC0 (make the respective output’s power stage high impedance, i.e., three-stated; autonomous restart upon fault removal), read/write, paged, stored in user-editable NVM. 111 MFR_OT_FAULT_ RESPONSE 0xD6 Action to be taken by the device when a control IC junction overtemperature fault is detected. No difference: 0xC0 (make the respective output’s power stage high impedance, i.e., three-stated; autonomous restart upon fault removal), read-only, non-paged, not stored in user-editable NVM. 108 MFR_IOUT_PEAKn 0xD7 Maximum measured value of READ_IOUTn since the last MFR_ CLEAR_PEAKS. No difference: default value not applicable, read-only, paged, not stored in NVM. 124 MFR_ADC_ CONTROL 0xD8 ADC telemetry parameter for repeated fast ADC readback. 0x00, read/write, not paged, not stored in NVM. Allows telemetry readback rates up to 125Hz instead of 10Hz, nominal. Use PAGE_PLUS_ READ/WRITE commands instead of the LTM4676's former MFR_ CHANNEL_ADDRESSn command. 0x80, read/write, paged, stored in user-editable NVM. MFR_ CHANNEL_ADDRESSn, the slave address to the PAGE-activated channel. 124 MFR_ADC_ TELEMETRY_ STATUS 0xDA ADC status during short-loop. Default value not applicable, read/ write, not paged, not stored in NVM. ADC status indicating most recently digitized telemetry when engaged in short round-robin loop (MFR_ADC_CONTROL = 0x0D) Command not supported. 125 MFR_RETRY_ DELAYn 0xDB Retry interval during fault-retry mode. No difference: 0xF3E8 (250ms), read/write, paged, stored in user-editable NVM. 103 |
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