XRP7725 Datasheet, PDF (30/34 Pages) Exar Corporation – Power Management System

XRP7725
Intel Node Manager Compatible Programmable
Power Management System
The scale and sample values will always
reflect what is saved in a project file. PA 5.1
will also read actual register values and report
discrepancies highlighted in red if there exist
during design development.
CURRENT READING ACCURACY
An important advantage of averaging current
readings across a large sample size is that a
distribution gets much tighter compared to
current reading through I²C bus in XRP7724.
The accuracy specification in the electrical
table includes quantization noise.
Quantization noise is divided down by the
square root of the number of samples taken
by the accumulator. For example, if 400
samples are taken, the quantization noise is
reduced by a factor of 20. The result below
shows how the current reading is much
improved whether the noise is from the board
or quantization noise.
PROGRAMMING XRP7725
XRP7725 is a FLASH based device which
means its configuration can be programmed
into FLASH NVM and re-programmed a
number of times.
Programming of FLASH NVM is done through
PA 5.1.
By clicking on the Flash button, user will start
programming sequence of the design
configuration into the Flash NVM. After the
programming sequence completes, the chip
will reset (if automatically reset After Flashing
box is checked), and boot the design
configuration from the Flash.
© 2014 Exar Corporation
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Rev. 1.0.0