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LTC2977 Datasheet(PDF) 129 Page - Analog Devices |
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LTC2977 Datasheet(HTML) 129 Page - Analog Devices |
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129 / 138 page  LTM4664A 129 Rev. 0 For more information www.analog.com PMBus COMMAND DETAILS MFR_TEMPERATURE_2_PEAK The MFR_TEMPERATURE_2_PEAK command reports the highest temperature, in degrees Celsius, reported by the READ_TEMPERATURE_2 measurement. This command is cleared using the MFR_CLEAR_PEAKS command. This read-only command has two data bytes and is formatted in Linear_5s_11s format. MFR_ADC_CONTROL The MFR_ADC_CONTROL command determines the ADC read back selection. A default value of 0 in the command runs the standard telemetry loop with all parameters updated in a round robin fashion with a typical latency of tCONVERT. The user can command a non-zero value to monitored a single parameter with an approximate update rate of 8ms. This command has a latency of up to 2 ADC conversions or approximately 16ms (external temperature conversions may have a latency of up to 3 ADC conversion or approximately 24ms). It is recommended the part remain in standard telemetry mode except for special cases where fast ADC updates of a single parameter is required. The part should be commanded to monitor the desired parameter for a limited period of time (less then 1 second) then set the command back to standard round robin mode. If this command is set to any value except standard round robin telemetry (0) all warnings and faults associated with telemetry other than the selected parameter are effectively disabled and voltage servoing is disabled. When round robin is reasserted, all warnings and faults and servo mode are re-enabled. COMMANDED VALUE TELEMETRY COMMAND NAME DESCRIPTION 0x0F Reserved 0x0E Reserved 0x0D Reserved 0x0C READ_TEMPERATURE_1 Channel 1 external temperature 0x0B Reserved 0x0A READ_IOUT Channel 1 measured output current 0x09 READ_VOUT Channel 1 measured output voltage 0x08 READ_TEMPERATURE_1 Channel 0 external temperature 0x07 Reserved 0x06 READ_IOUT Channel 0 measured output current 0x05 READ_VOUT Channel 0 measured output voltage 0x04 READ_TEMPERATURE_2 Internal junction temperature 0x03 READ_IIN Measured input supply current 0x02 MFR_READ_ICHIP Measured supply current of the LTM4664A 0x01 READ_VIN Measured input supply voltage 0x00 Standard ADC Round Robin Telemetry If a reserved command value is entered, the telemetry will default to Internal IC Temperature and issue a CML fault. CML faults will continue to be issued by the LTM4664A until a valid command value is entered. The accuracy of the measured input supply voltage is only guaranteed if the MFR_ADC_CONTROL command is set to standard round robin telemetry. This write-only command has 1 data byte and is formatted in register format. |
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