On/Off/Margin - Analog Devices Linear LTM 4700 User Manual

PMBus COMMAND DETAILS
A ShortCycle event occurs whenever the PWM channel is commanded back ON, or reactivated, after the part has been
commanded OFF and is processing either the TOFF_DELAY or the TOFF_FALL states. The PWM channel can be turned
ON and OFF through either the RUN pin and or the PMBus OPERATION command.
If the PWM channel is reactivated during the TOFF_DELAY, the part will perform the following:
1. Immediately tri-state the PWM channel output;
2. Start the retry delay timer as specified by the t
3. After the t
OFF(MIN)
MFR_SPECIFIC bit #1 will assert.
If the PWM channel is reactivated during the TOFF_FALL, the part will perform the following:
1. Stop ramping down the PWM channel output;
2. Immediately tri-state the PWM channel output;
3. Start the retry delay timer as specified by the t
4. After the t
OFF(MIN)
MFR_SPEFIFIC bit #1 will assert.
If the SHORT Cycle event occurs and the ShortCycle MFR_CHAN_CONFIG bit is not set, the PWM channel state machine
will complete its TOFF_DELAY and TOFF_FALL operations as previously commanded by the user.
MFR_CONFIG_ALL
General purpose configuration command common to multiple ADI products.
BIT MEANING
7 Enable Fault Logging
6 Ignore Resistor Configuration Pins
5 Mask PMBus, Part II, Section 10.9.1 Violations
4 Disable SYNC output
3 Enable 255ms PMBus timeout
2 A valid PEC required for PMBus writes to be accepted. If this bit is not
set, the part will accept commands with invalid PEC.
1 Enable the use of PMBus clock stretching
0 Execute CLEAR_FAULTS on rising edge of either RUN pin.
This command has one data byte.

ON/OFF/MARGIN

CMD
COMMAND NAME CODE
ON_OFF_CONFIG 0x02
OPERATION 0x01
MFR_RESET 0xFD
value has expired, the PWM channel will proceed to the TON_DELAY state and the STATUS_
value has expired, the PWM channel will proceed to the TON_DELAY state and the STATUS_
DESCRIPTION
RUN pin and PMBus bus on/off command configuration.
Operating mode control. On/off, margin high and margin
low.
Commanded reset without requiring a power-down.
For more information
.
OFF(MIN)
.
OFF(MIN)
TYPE
R/W Byte
R/W Byte
Send Byte
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LTM4700
DATA
PAGED FORMAT UNITS NVM
Y Reg Y
Y Reg Y
N
DEFAULT
VALUE
0x1E
0x80
NA
Rev. B
79