PCM18XK1 Microchip Technology, PCM18XK1 Datasheet - Page 28

• Manufacturer Part Number: PCM18XK1
• Description: MODULE PROC PIC18F8680,6680,8565
• Manufacturer: Microchip Technology

Specifications of PCM18XK1

• Accessory Type: Processor Module
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: ICE2000
• For Use With: ICE2000 - EMULATOR MPLAB-ICE 2000 POD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F6585/8585/6680/8680
2.6
The PIC18F6585/8585/6680/8680 devices include a
feature that allows the system clock source to be
switched from the main oscillator to an alternate
low-frequency
PIC18F6585/8585/6680/8680 devices, this alternate
clock source is the Timer1 oscillator. If a low-frequency
crystal (32 kHz, for example) has been attached to the
Timer1 oscillator pins and the Timer1 oscillator has
been enabled, the device can switch to a low-power
FIGURE 2-7:
DS30491C-page 26
Oscillator Switching Feature
clock
OSC2
OSC1
T1OSO
T1OSI
DEVICE CLOCK SOURCES
source.
Timer1 Oscillator
Main Oscillator
PIC18FXX80/XX85
For
Sleep
T1OSCEN
Enable
Oscillator
the
Clock Source Option
for other Modules
4 x PLL
register details.
execution mode. Figure 2-7 shows a block diagram of
the system clock sources. The clock switching feature
is enabled by programming the Oscillator Switching
Enable (OSCSEN) bit in configuration register,
CONFIG1H, to a ‘0’. Clock switching is disabled in an
erased device. See Section 12.0 “Timer1 Module” for
further details of the Timer1 oscillator. See Section 24.0
“Special Features of the CPU” for configuration
T
T
T
OSC
1
P
Tosc/4
Source
Clock
 2004 Microchip Technology Inc.
T
SCLK