PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 261

• Manufacturer Part Number: PIC18F258
• Description: High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
• Manufacturer: MICROCHIP [Microchip Technology]

23.2.1
The Internal Reference Voltage of the LVD module may
be used by other internal circuitry (the Programmable
Brown-out Reset). If these circuits are disabled (lower
current consumption), the reference voltage circuit
requires a time to become stable before a low voltage
condition can be reliably detected. This time is invariant
of system clock speed. This start-up time is specified in
electrical specification parameter 36. The low voltage
interrupt flag will not be enabled until a stable reference
voltage is reached. Refer to the waveform in Figure 23-4.
23.2.2
When the module is enabled, the LVD comparator and
voltage divider are enabled and will consume static cur-
rent. The voltage divider can be tapped from multiple
places in the resistor array. Total current consumption,
when enabled, is specified in electrical specification
parameter D022B.
2002 Microchip Technology Inc.
REFERENCE VOLTAGE SET POINT
CURRENT CONSUMPTION
Preliminary
23.3
When enabled, the LVD circuitry continues to operate
during SLEEP. If the device voltage crosses the trip
point, the LVDIF bit will be set and the device will
wake-up from SLEEP. Device execution will continue
from the interrupt vector address if interrupts have
been globally enabled.
23.4
A device RESET forces all registers to their RESET
state. This forces the LVD module to be turned off.
Operation During SLEEP
Effects of a RESET
PIC18FXX8
DS41159B-page 259