PIC16F8X
FIGURE 8-12: TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO V
DD
): FAST V
DD
RISE TIME
V
DD
MCLR
INTERNAL POR
T
PWRT
PWRT TIME-OUT
T
OST
OST TIME-OUT
INTERNAL RESET
FIGURE 8-13: TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO V
DD
): SLOW V
DD
RISE TIME
V1
V
DD
MCLR
INTERNAL POR
T
PWRT
PWRT TIME-OUT
T
OST
OST TIME-OUT
INTERNAL RESET
When V
DD
rises very slowly, it is possible that the T
PWRT
time-out and T
OST
time-out will expire before V
DD
has reached its 铿乶al value. In this example, the chip will reset properly if, and only if, V1
鈮?/div>
V
DD
min.
漏
1998 Microchip Technology Inc.
DS30430C-page 45
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