PIC18F2450 Datasheet, PDF (38/320 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

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