LTC3882-1
72
Rev A
For more information
ON_OFF_CONFIG
The ON_OFF_CONFIG command specifies the combination of RUN
n
pin input state and PMBus commands needed to
turn the PWM channel on and off.
Supported Values:
VALUE
MEANING
0x1F
OPERATION value and RUN
n
pin must both command the device to start/run. Device executes immediate off when commanded off with
the RUN pin.
0x1E
OPERATION value and RUN
n
pin must both command the device to start/run. Device uses TOFF_ command values when commanded off.
0x17
RUN
n
pin control with immediate off when commanded off. OPERATION on/off control ignored.
0x16
RUN
n
pin control using TOFF_ command values when commanded off. OPERATION on/off control ignored.
Programming an unsupported ON_OFF_CONFIG value will generate a CML fault and the command will be ignored.
This command has one data byte.
ON, OFF AND MARGIN CONTROL
COMMAND NAME
CMD
CODE DESCRIPTION
TYPE
PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
ON_OFF_CONFIG
0x02 RUN pin and PMBus on/off command
configuration.
R/W Byte
Y
Reg
l
0x1E
OPERATION
0x01 On, off and margin control.
R/W Byte
Y
Reg
l
0x80
MFR_RESET
0xFD Force full reset without removing power.
Send Byte
N
PMBus COMMAND DETAILS
(General Device Configuration)
MFR_CONFIG_ALL_LTC3882-1
The MFR_CONFIG_ALL_LTC3882-1 command provides device-level configuration common to multiple LTC PMBus
products.
Bit Definitions:
BIT
MEANING
7
Enable fault logging.
6
Ignore resistor configuration pins. Does not apply to ASEL0 or ASEL1.
5
Disable CML fault for Quick Command message.
4
Disable SYNC output.
3
Enable 255ms PMBus timeout.
2
Require valid PEC for PMBus write.
1
Enable PMBus clock stretching.
0
Execute CLEAR_FAULTS on rising edge of either RUN pin.
If a legal command is received with an invalid PEC, the LTC3882-1 will not execute the command, regardless of the state
of bit 2. If clock stretching is enabled, the LTC3882-1 only uses it as required, generally above SCL rates of 100kHz.
This command has one data byte.
