Datasheet

PIC16F627A/628A/648A
DS40044G-page 102 © 2009 Microchip Technology Inc.
FIGURE 14-6: SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
S
R
Q
External
Reset
MCLR/
V
DD
OSC1/
WDT
Module
V
DD Rise
Detect
OST/PWRT
WDT
Time-out
Power-on Reset
OST
PWRT
Chip_Reset
10-bit Ripple-counter
Reset
Enable OST
Enable PWRT
Sleep
See Table 14-3 for time out situations.
Note 1: This is a separate oscillator from the INTOSC/RC oscillator.
Brown-out
Reset
BOREN
CLKIN
Pin
V
PP Pin
10-bit Ripple-counter
Q
Schmitt Trigger Input
On-chip
(1)
OSC