PIC18F2331 MICROCHIP [Microchip Technology], PIC18F2331 Datasheet - Page 282

• Manufacturer Part Number: PIC18F2331
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2331/2431/4331/4431
FIGURE 22-2:
DS39616B-page 280
CPU Clock
Multiplexer
Note 1:
Peripheral
PLL Clock
Program
INTOSC
Counter
Output
OSC1
Clock
T
Wake from Interrupt Event
OST
= 1024 T
PC
TIMING TRANSITION FOR TWO-SPEED START-UP (INTOSC TO HSPLL)
OSC
Q1
; T
T
PLL
OST (1)
= 2 ms (approx). These intervals are not shown to scale.
Q2
PC + 2
OSTS bit Set
T
Q3
PLL (1)
Preliminary
Q4
Q1
1
2
Clock Transition
3
4
5
PC + 4
6
7
8
Q2
 2003 Microchip Technology Inc.
Q3 Q4
Q1
Q2
PC + 6
Q3 Q4