Analog Devices Linear LTM 4700 User Manual page 114

LTM4700
PMBus COMMAND DETAILS
MFR_READ_ICHIP
The MFR_READ_ICHIP command returns the measured input current, in Amperes, used by the LTM4700.
This command has two data bytes and is formatted in Linear_5s_11s format.
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 t
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
0x0F
0x0E
0x0D
0x0C
0x0B
0x0A
0x09
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
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 LTM4700 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.
114
TELEMETRY COMMAND NAME
READ_TEMPERATURE_1
READ_IOUT
READ_VOUT
READ_TEMPERATURE_1
READ_IOUT
READ_VOUT
READ_TEMPERATURE_2
READ_IIN
MFR_READ_ICHIP
READ_VIN
For more information
DESCRIPTION
Reserved
Reserved
Reserved
Channel 1 external temperature
Reserved
Channel 1 measured output current
Channel 1 measured output voltage
Channel 0 external temperature
Reserved
Channel 0 measured output current
Channel 0 measured output voltage
Internal junction temperature
Measured input supply current
Measured supply current of the
LTM4700
Measured input supply voltage
Standard ADC Round Robin Telemetry
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Rev. B