Datasheet

= ´
Exponent
READ _ VOUT _ CAL _ OFFSET Mantissa 2
TPS40400
SLUS930B –APRIL 2011– REVISED OCTOBER 2011 www.ti.com
NOTE
Subsequent to setting the WPE bit, either a STORE_DEFAULT_ALL or
STORE_DEFAULT_CODE (for MFR_SPECIFIC_00) PMBus command must be issued in
order to prevent the WPE bit from being cleared when the device is subjected to a
reset-restart operation.
MFR_SPECIFIC_01 (D1h)
This command is used for trimming internal components of the TPS40400 and is not recommended for general
use.
MFR_SPECIFIC_02 (D2h)
This command is used for trimming internal components of the TPS40400 and is not recommended for general
use.
MFR_SPECIFIC_03 (D3h)
This command is used for trimming internal components of the TPS40400 and is not recommended for general
use.
MFR_SPECIFIC_04 (D4h)
This command applies an offset to the READ_VOUT command results to calibrate out offset errors in the on
board measurement system. The contents of this register can be stored to non-volatile memory using the
STORE_DEFAULT_ALL or STORE_DEFAULT_CODE commands.
Command MFR_SPECIFIC_04
Format Linear, two's compliment binary
Bit Position 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
Access r/w r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r/w r/w r/w r/w r/w r/w r/w
Function Mantissa
Default Value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(1) Bits are sign extension only and are not otherwise programmable.
Default value: 0
• Exponent is fixed at 2
-10
by VOUT_MODE
• LSB value is 975 µV
• Range -125 mV to 124 mV (32)
MFR_SPECIFIC_05 (D5h)
This command applies a gain correction to the READ_VOUT command results to calibrate out gain errors in the
on board measurement system. The contents of this register can be stored to non-volatile memory using the
STORE_DEFAULT_ALL or STORE_DEFAULT_CODE commands.
Command MFR_SPECIFIC_05
Format Linear, two's compliment binary
Bit Position 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
Access r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r
(1)
r/w r/w r/w r/w r/w
Function Exponent Mantissa
Default Value 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0
(1) Bits are sign extension only and are not otherwise programmable.
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