PIC18F6585 Datasheet, PDF (32/496 Pages) Microchip Technology – 64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module

PIC18F6585/8585/6680/8680
If the main oscillator is configured in the RC, RCIO, EC
or ECIO modes, there is no oscillator start-up time-out.
Operation will resume after eight cycles of the main
oscillator have been counted. A timing diagram, indi-
cating the transition from the Timer1 oscillator to the
main oscillator for RC, RCIO, EC and ECIO modes, is
shown in Figure 2-12.
FIGURE 2-12:
TIMING FOR TRANSITION BETWEEN TIMER1 AND OSC1 (RC, EC)
Q3
Q4
T1OSI
OSC1
Q1
TT1P
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
TOSC
12 34 5 6 7 8
Internal System
Clock
SCS
(OSCCON<0>)
Program
Counter
PC
Note:
RC Oscillator mode assumed.
TSCS
PC + 2
PC + 4
DS30491C-page 30
 2004 Microchip Technology Inc.