
PIC16C432
DS41140B-page 36
Preliminary
2002 Microchip Technology Inc.
FIGURE 7-2:
SINGLE COMPARATOR
7.3.1
EXTERNAL REFERENCE SIGNAL
When external voltage references are used, the
comparator module can be configured to have the com-
parators operate from the same, or different reference
sources. However, threshold detector applications may
require the same reference. The reference signal must
be between VSS and VDD and can be applied to either
pin of the comparator(s).
7.3.2
INTERNAL REFERENCE SIGNAL
The comparator module also allows the selection of an
internally
generated
voltage
reference
for
the
contains a detailed description of the Voltage Refer-
ence Module that provides this signal. The internal ref-
erence signal is used when the comparators are in
internal voltage reference is applied to the VIN+ pin of
both comparators.
7.4
Comparator Response Time
Response time is the minimum time, after selecting a
new reference voltage or input source, before the
comparator output has a valid level. If the internal ref-
erence is changed, the maximum delay of the internal
voltage reference must be considered when using the
comparator outputs, otherwise the maximum delay of
+
-
VIN+
VIN-
Output
VIN-
VIN+