PAC1721 datasheet(49/92 Pages) MICROCHIP

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DS-20007088A-page 49

PAC1721

VPOWER_MIN (ADDRESS 0DH)

R-0

VPOWER_MIN[23:16]

bit 31

bit 24

R-0

VPOWER_MIN[15:8]

bit 23

bit 16

R-0

VPOWER_MIN[7:0]

bit 15

bit 8

U-0

–

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as 0

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

X = Bit is unknown

bit 31:8

VPOWER_MIN[23:0]: This register contains the minimum calculated VPOWER value (VBUS × VSENSE).

The value is a 24-bit unsigned number, unless either VBUS or VSENSE are configured to have a bipolar

range. In that case, the value is stored using 23 bits and one sign bit (2’s complement).

The value is determined by a single data conversion and is independent of averaging or N-Samples

limits.

A Refresh command resets the register, while a Refresh_V command does not.

Note:

Power is always calculated using signed numbers for VBUS and VSENSE. However, if both

VBUS and VSENSE are measured using the default unipolar mode, power is reported as an

unsigned number. This can cause very small discrepancies between a manual comparison

of VBUS × VSENSE and the results that PAC1721 calculates and accumulates for VPOWER.

PAC1721 performs calculations using more bits than the reported results for VBUS and

VSENSE. Thus, in some cases, values stored in the VPOWER and VACC registers are more

accurate than calculations using the values stored in the VBUS and VSENSE registers.

bit 7:0

Unimplemented at this time. Always reads 0.

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