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PAC1941T-1E/4MX. Datasheet(PDF) 50 Page - Microchip Technology

Part # PAC1941T-1E/4MX.
Description  Single/Multi-Channel Power Monitor with Accumulator, 9V Full-Scale Range
PDF  96 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PAC1941T-1E/4MX. Datasheet(HTML) 50 Page - Microchip Technology

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PAC194X
DS20006543A-page 50
 2021 Microchip Technology Inc.
REGISTER 7-9:
VPOWERN (17H-1AH) REGISTER
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
VPOWERn[29:22]
bit 31
bit 24
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
VPOWERn[21:14]
bit 23
bit 16
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
VPOWERn[13:6]
bit 15
bit 8
R-0
R-0
R-0
R-0
R-0
R-0
U-0
U-0
VPOWERn[5:0]
—
—
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 31-2
VPOWERn[29-0]: This register contains the product of VBUS (14 MSBs) and VSENSE, which
represents the proportional power for each channel. These are 30-bit unsigned numbers unless either
VBUS or VSENSE is configured to have a bipolar range. In that case, they will be 29 bits + sign (two’s
complement) numbers. These are the numbers that are accumulated in the accumulators. Power is
always calculated using signed numbers for VBUS and VSENSE, but if both VBUS and VSENSE are in the
default Unipolar mode, power is reported as an unsigned number. This can lead to very small discrep-
ancies between a manual comparison of the product of VBUS and VSENSE and the results that the chip
calculates for VPOWER. The digital math in the chip uses more bits than the reported results for VBUS
and VSENSE, so the results registers for VPOWER and the accumulated power will in some cases have
a more accurate number than calculations using the results registers for VSENSE and VPOWER will
provide.
bit 1-0
Unimplemented, read as ‘0’.



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