PIC16F526 Datasheet, PDF (51/122 Pages) Microchip Technology – 14-Pin, 8-Bit Flash Microcontroller

PIC16F526
FIGURE 8-7:
VDD
RB3/MCLR/VPP
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
Power-up
Detect _{POR (Power-on Reset)}
MCLR Reset
S
MCLRE
WDT Time-out
Pin Change
Sleep
Comparator Change
Wake-up on
Comparator Change
WDT Reset
Wake-up on pin Change Reset
R
Start-up Timer
(10 ms, 1.125 ms
or 18 ms)
Q
Q
CHIP Reset
FIGURE 8-8:
TIME-OUT SEQUENCE ON POWER-UP (MCLR PULLED LOW)
VDD
MCLR
Internal POR
TDRT
DRT Time-out
Internal Reset
FIGURE 8-9:
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): FAST VDD RISE
TIME
VDD
MCLR
Internal POR
DRT Time-out
Internal Reset
TDRT
 2010 Microchip Technology Inc.
DS41326D-page 51