PAC1934 Evaluation Board (ADM00805) User’s Guide
DS50002673A-page 22
2017 Microchip Technology Inc.
FIGURE 3-6:
RECENT LOG FILE WINDOW
3.3
PAC SETTINGS SECTION
Each input channel of the PAC1934 is internally set for unipolar/unidirectional voltage
on V
BUS
and unidirectional currents on V
SENSE
by default. However, in the GUI, all four
channels are configured for bidirectional currents by default. This bidirectional setting
avoids clipping of negative values. For bidirectional currents the V
SENSE
results are in
16-bit two's complement representation. A drop-down menu allows reconfiguring each
channel or turning it off as shown in
Figure 3-7
for channel 4 (1). Using the GUI this way
programs the appropriate register for the selected channel.
FIGURE 3-7:
PAC SETTINGS WINDOW
3.3.1
Alert Settings
The check boxes enable turning on the alert function and selecting which type of con-
ditions can trigger the alert function: Conversion Complete or Accumulator Overflow.
The alert status is also displayed underneath the check boxes, as shown in
Figure 3-7
(2).
The GUI is not fast enough to capture the conversion based ALERT, which lasts only
5
μ
S. The SLOW/ALERT pin must be monitored with a circuit fast enough to detect the
5
μ
S wide ALERT signal to use this function.
1
2
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