PIC16F616 Microchip Technology Inc., PIC16F616 Datasheet - Page 66

• Manufacturer Part Number: PIC16F616
• Description: 14-pin Flash-based, 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

PIC16F610/616/16HV610/616
8.9
Each comparator has built-in hysteresis that is user
enabled by setting the C1HYS or C2HYS bits of the
CM2CON1 register. The hysteresis feature can help
filter noise and reduce multiple comparator output
transitions when the output is changing state.
FIGURE 8-7:
DS41288C-page 64
Note:
(Without Hysteresis)
(With Hysteresis)
Comparator Hysteresis
The black areas of the comparator output represents the uncertainty due to input offsets and response time.
Output
Output
V
V
V
V
H
IN
IN
H
+
-
-
+
COMPARATOR HYSTERESIS
V+
V
V
IN
IN
+
-
Preliminary
+
–
Figure 8-9 shows the relationship between the analog
input levels and digital output of a comparator with and
without hysteresis. The output of the comparator
changes from a low state to a high state only when the
analog voltage at V
threshold (V
from a high state to a low state only when the analog
voltage at V
threshold (V
H
H
+). The output of the comparator changes
-).
IN
+ falls below the lower hysteresis
Output
IN
+ rises above the upper hysteresis
© 2007 Microchip Technology Inc.