PIC18F2450 MICROCHIP [Microchip Technology], PIC18F2450 Datasheet - Page 38

• Manufacturer Part Number: PIC18F2450
• Description: 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2450/4450
FIGURE 3-3:
FIGURE 3-4:
DS39760A-page 36
Note 1:
Peripheral
Program
Counter
INTRC
OSC1
Clock
Clock
CPU
Note 1:
CPU Clock
Peripheral
PLL Clock
Program
Counter
Output
INTRC
OSC1
Clock transition typically occurs within 2-4 T
Clock
2:
Q1
SCS1:SCS0 bits Changed
T
Clock transition typically occurs within 2-4 T
OST
Q2
TRANSITION TIMING TO RC_RUN MODE
PC
TRANSITION TIMING FROM RC_RUN MODE TO PRI_RUN MODE
= 1024 T
Q3
Q4
OSC
Q1
Q1
; T
T
PLL
1
OST (1)
= 2 ms (approx). These intervals are not shown to scale.
PC
2
Q2
Advance Information
Clock Transition
3
T
PLL
OSC
OSTS bit Set
Q3
(1)
.
OSC
PC + 2
(1)
n-1
.
Q4
n
Q1
1
Transition
2
Clock
(2)
n-1 n
Q2
PC + 2
Q3
Q2
Q4
© 2006 Microchip Technology Inc.
Q3 Q4
Q1
Q1
PC + 4
Q2
PC + 4
Q2
Q3
Q3