RFPIC12C509AG Datasheet, PDF (51/104 Pages) Microchip Technology – 18/20-Pin 8-Bit CMOS Microcontroller with UHF ASK/FSK Transmitter

rfPIC12C509AG/509AF
FIGURE 8-6:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
VDD
GP3/MCLR/VPP
Power-up
Detect
POR (Power-on Reset)
Pin Change
SLEEP
Wake-up on
pin change
MCLRE
On-chip
DRT OSC
WDT Time-out
RESET
8-bit Asynch
S
Q
Ripple Counter
(Start-up Timer)
R
Q
CHIP RESET
FIGURE 8-7:
TIME-OUT SEQUENCE ON POWER-UP (MCLR PULLED LOW)
VDD
MCLR
INTERNAL POR
TDRT
DRT TIME-OUT
INTERNAL RESET
FIGURE 8-8:
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): FAST VDD RISE
TIME
VDD
MCLR
INTERNAL POR
DRT TIME-OUT
INTERNAL RESET
TDRT
© 2001 Microchip Technology Inc.
Preliminary
DS70031A-page 49