User Manual
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V 1.0
2021-08-25
XDPP1100 technical reference manual
Digital power controller
Voltage control
Peripheral Field name
Access Address
Bits
Description
+vc_vavp_itot_delta
1: vc_vavp_otpt_uc_sel
5.7
Voltage control PMBus commands
The relevant voltage control-related PMBus commands are given in
Table 28
Voltage control-related PMBus commands
Command name
Access Length Address Bits
Description
VOUT_MODE
RW
Byte
20h
[7:0]
Defines the format of the V
OUT
-related
PMBus commands.
[7:5] Only ULINEAR16 mode supported,
x00b
[4:0] Exponent of V
OUT
-related
commands, 14h to 18h (-8d to -12d)
supported
VOUT_COMMAND
RW
Word
21h
[15:0] Defines the output voltage when
selected by the OPERATION command.
Format is ULINEAR16 with the exponent
defined by VOUT_MODE[4:0].
VOUT_TRIM
RW
Word
22h
[15:0] Used to apply a fixed offset voltage to
the output voltage command value. It is
most typically used by the end user to
trim the output voltage at the time the
PMBus device is assembled into the end
user’s syste
m. Format is SLINEAR16 with
the exponent defined by
VOUT_MODE[4:0].
VOUT_CAL_OFFSET
RW
Word
23h
[15:0] Used to apply a fixed offset voltage to
the output voltage command value. It is
most typically used by the PMBus device
manufacturer to calibrate a device in the
factory. Format is SLINEAR16 with the
exponent defined by VOUT_MODE[4:0].
VOUT_MAX
RW
Word
24h
[15:0] Sets an upper limit on the output
voltage the unit can command
regardless of any other commands or
combinations. The intent of this
command is to provide a safeguard
against a user accidentally setting the
output voltage to a possibly destructive
level rather than to be the primary
output overvoltage protection. Format
is ULINEAR16 with the exponent defined
by VOUT_MODE[4:0].
VOUT_MARGIN_HIGH
RW
Word
25h
[15:0] Defines the output voltage when
selected by the OPERATION command.
Format is ULINEAR16 with the exponent
defined by VOUT_MODE[4:0].
