Information

PIC18F2525/2620/4525/4620
DS80200D-page 4 © 2006 Microchip Technology Inc.
9. Module: A/D
The A/D offset is greater than the specified limit in
Table 26-24 of the Device Data Sheet. The
updated conditions and limits are shown in bold
text in Table 2.
Work around
Three work arounds exist.
1. Configure the A/D to use the V
REF+ and VREF-
pins for the voltage references. This is done by
setting the VCFG<1:0> bits (ADCON1<5:4>).
2. Perform a conversion on a known voltage
reference voltage and adjust the A/D result in
software.
3. Increase system clock speed to 40 MHz and
adjust A/D settings accordingly. Higher system
clock frequencies decrease offset error.
Date Codes that pertain to this issue:
All engineering and production devices.
TABLE 2: A/D CONVERTER CHARACTERISTICS: PIC18F2525/2620/4525/4620 (INDUSTRIAL)
PIC18LF2525/2620/4525/4620 (INDUSTRIAL)
10. Module: BOR
The BOR module may reset below the minimum
operating voltage of the device when configured
for BORV1:BORV0 = 11. The updated Reset
voltage specifications are shown in bold in
Table 3.
TABLE 3: BROWN-OUT RESET VOLTAGE
Work around
Use the next higher BOR voltage setting to ensure
a low V
DD is detected above 2.0V.
Date Codes that pertain to this issue:
All engineering and production devices.
11. Module: ECCP
CCP1 configured for auto-shutdown with
Comparator 1 corrupts the PWM duty cycle pulse.
In addition, it does not always synchronize the
pulse to the beginning of the period and the end of
the pulse can occur at any time within the period.
Work around
Use FLT0 for the auto-shutdown source. Applica-
tions which can tolerate a shutdown response time
of several T
CYs may use the comparator interrupt
flag to detect a shutdown event and disable the
PWM by clearing the EECPASE bit
(ECCP1AS<7>).
Date Codes that pertain to this issue:
All engineering and production devices.
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
A06A E
OFF Offset Error — — <±2.0 LSb VREF = VREF+ and VREF-
A06 E
OFF Offset Error — — <±3.5 LSb VREF = VSS and VDD
Param
No.
Sym Characteristic Min Typ Max Unit
D005 V
BOR Brown-out Reset Voltage
PIC18LF2525/2620/4525/4620
BORV1:BORV0 =
11 N/A 2.05 N/A V