Information
2002 Microchip Technology Inc. DS80058H-page 5
PIC18CXX2
Clarifications/Corrections to the Data Sheet:
In the Device Data Sheet (DS39026C), the following
clarifications and corrections should be noted.
1. Module: Brown-out Reset (BOR)
The voltage selection ranges for the BOR module
(parameter D005) have changed. The new values
are shown in Table 1 (below).
2. Module: Low Voltage Detect (LVD)
The voltage selection ranges for the LVD module
(parameter D420) have changed. The new values
are shown in Table 2 (below).
3. Module: Timer1
Section 11.1 (Timer1 Operation) is amended with
the following clarification:
When Timer1 is configured to operate as an asyn-
chronous counter, care must be taken that there is
no incoming pulse while the module is being
turned off. If an incoming pulse arrives while
Timer1 is being turned off, the value of register
TMR1 may become unpredictable.
If an application requires that Timer1 be turned off
and if it is possible that Timer1 may receive an
incoming pulse while being turned off, synchronize
the external clock first, by clearing the T1SYNC bit
of register T1CON. Please note that this may
cause Timer1 to miss up to one count.
TABLE 1: MINIMUM AND MAXIMUM BROWN-OUT RESET VOLTAGE SPECIFICATIONS
Param
No
Symbol Characteristic
New Specification
Data Sheet
Specification
Units
Min Typ Max Min Typ Max
D005 V
BOR Brown-out Reset
Voltage
BORV<1:0> = 11 2.35 — 2.80 2.50 — 2.66 V
BORV<1:0> = 10 2.55 — 3.02 2.70 — 2.86 V
BORV<1:0> = 01 3.95 — 4.71 4.20 — 4.46 V
BORV<1:0> = 00 4.23 — 5.05 4.50 — 4.78 V
TABLE 2: MINIMUM AND MAXIMUM LOW VOLTAGE DETECT SPECIFICATIONS
Param
No
Symbol Characteristic
New Specification
Data Sheet
Specification
Units
Min Typ Max Min Typ Max
D420 V
LVD Low Voltage
Detect
LVV<3:0> = 0100 2.35 — 2.80 2.5 — 2.66 V
LVV<3:0> = 0101 2.55 — 3.02 2.7 — 2.86 V
LVV<3:0> = 0110 2.64 — 3.14 3.0 — 2.98 V
LVV<3:0> = 0111 2.83 — 3.37 3.0 — 3.20 V
LVV<3:0> = 1000 3.11 — 3.71 3.3 — 3.52 V
LVV<3:0> = 1001 3.29 — 3.93 3.5 — 3.72 V
LVV<3:0> = 1010 3.39 — 4.04 3.6 — 3.84 V
LVV<3:0> = 1011 3.58 — 4.26 3.8 — 4.04 V
LVV<3:0> = 1100 3.77 — 4.49 4.0 — 4.26 V
LVV<3:0> = 1101 3.95 — 4.71 4.2 — 4.46 V
LVV<3:0> = 1110 4.23 — 5.05 4.5 — 4.78 V