Information

PIC18(L)F1XK22
DS80437F-page 8  2009-2011 Microchip Technology Inc.
8. Module: Resets
8.1 Reset Under Low-Power Conditions
When employing any one of the low-power
oscillators (ECL mode, LP mode, LFINTOSC
or Timer1 Oscillator) at temperatures of -
20°C or colder, while at the same time the
source voltage supplied to the V
DD pin drops
below 2.4 volts, the device may experience a
Power-on Reset (POR). Also, when the
source voltage supplied to the V
DD pin is
below 2.4 volts, at temperatures of -20°C or
colder, and a SLEEP instruction is executed,
the device may experience a Power-on
Reset (POR) upon entering Sleep mode,
regardless of the type of clock source being
used or which power-managed mode is
being employed.
Work around
There are four work-arounds available to
avoid this Reset condition:
1. Enabling the Brown-out Reset (BOR) circuitry.
2. Enabling the Fixed Voltage Reference (FVR)
module.
3. Maintaining a source voltage (V
DD) to the device
above 2.4 volts when operating at temperatures
of -20°C or colder.
4. Use the LF product version (PIC18LF14K22/
13K22) where the operational V
DD requirement
is between 1.8V and 3.6V.
Affected Silicon Revisions
9. Module: Comparators
9.1 High Offset Voltage at Low Temperatures
Comparators may have up to ±70 mV of
Input Offset Voltage at temperatures below -
10°C when comparators are configured to
operate in High-Power mode.
Work around
None.
Affected Silicon Revisions
Note: This issue pertains only to the F product
versions, PIC18F14K22/13K22. The LF
product versions, PIC18LF14K22/13K22,
are not affected by this issue in any way.
A3 A7 A8 AA
X
A3 A7 A8 AA
XXX
X