Maxim-integrated MAX15301 PMBus Command Set Manual de usuario descargar pdf (Pagina 47)

MAX15301 PMBus Command Set User’s Guide

Rev 1 Page 47 of 53

STRAP_DISABLE

Reference:

Maxim Specific

Lockable:

Yes

Command Code:

0xDC

Format:

Bit field

Data Bytes:

Units:

N/A

Transfer:

Read/Write Word

Factory Value:

0x0000

Description/Notes:

Several commands in the MAX15301 can be set directly by resistor value connected to a device pin,

or are set indirectly according to the value of other pin-configurable commands. Of these “pin-

configurable” commands, the STRAP_DISABLE command keeps track of those that have been directly

altered by a user through the SMBus serial interface.

When one of the commands in the table below is edited, the corresponding bit-

flag in

STRAP_DISABLE is set, and this flag prevents the device from automatically setting the value of that

command in the future, preserving the user-set value instead.

Note that the STRAP_DISABLE command can be saved in the USER and DEFAULT nonvolatile stores. In

order to disable pin-configuration of a command, the flag for that command must be 1, and a

STORE_USER_ALL

operation must have been performed, to ensure that the device powers up with

the flag set in the working-memory version of STRAP_DISABLE. (This process is handled automatically

without need for special user interaction in most situations.)

To restore pin-configuration capability for a command, clear the corresponding bit in STRAP_DISABLE

and send the STORE_USER_ALL command.

Bit

Command

Comments

15 INTERLEAVE

Command set indirectly by the SMBus slave address, from

ADDR0

and R

ADDR1

resistor values. (Note that this STRAP_DISABLE

bit is not actually used in the INTERLEAVE pin-strapping

decision; any non-zero value of INTERLEAVE cancels the

determination of phase relationship based on the PMBus

address.)

14 COMP_MODEL

The F

data is set automatically by the parametric extraction

process

VOUT_MAX

Command set indirectly according to VOUT_COMMAND x 110%

IOUT_CAL_GAIN

Command set by R

ADDR1

resistor value

FREQUENCY_SWITCH

Command set by R

SYNC

resistor value

IOUT_OC_FAULT_LIMIT

Command not set automatically; flag is for future sue

VOUT_MARGIN_LOW

Command set indirectly according to VOUT_COMMAND x 95%

VOUT_MARGIN_HIGH

Command set indirectly according to VOUT_COMMAND x 105%

POWER_GOOD_OFF

Command set indirectly according to VOUT_COMMAND x 85%

POWER_GOOD_ON

Command set indirectly according to VOUT_COMMAND x 90%

VOUT_UV_WARN_LIMIT

Undervoltage warning is not implemented

VOUT_UV_FAULT_LIMIT

Command set indirectly according to VOUT_COMMAND x 85%

VOUT_OV_WARN_LIMIT

Overvoltage warning is not implemented

VOUT_OV_FAULT_LIMIT

Command set indirectly according to VOUT_COMMAND x 115%

VOUT_COMMAND

Command set by R

SET

resistor value

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 53

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