MA180025 Microchip Technology, MA180025 Datasheet - Page 35

• Manufacturer Part Number: MA180025
• Description: MODULE PLUG-IN PIC18F87J90 PIM
• Manufacturer: Microchip Technology
• Series: PIC®r

Specifications of MA180025

• Accessory Type: Plug-In Module (PIM) - PIC18F87J90
• Product: Microcontroller Modules
• Silicon Manufacturer: Microchip
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Silicon Core Number: PIC18F
• Silicon Family Name: PIC18FxxJxx
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM LCD 2 Demonstration Board (DM163030)
• For Use With: DM163030 - KIT DEV PICDEM LCD2
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3.0
3.1
The PIC18F87J90 family of devices can be operated in
eight different oscillator modes:
1.
2.
3.
4.
5.
6.
7.
8.
FIGURE 3-1:
 2010 Microchip Technology Inc.
ECPLL
EC
HSPLL
HS
INTPLL1 Internal oscillator block with software
INTIO1
INTPLL2 Internal oscillator block with software
INTIO2
T1OSO
T1OSI
OSC2
OSC1
OSCILLATOR
CONFIGURATIONS
Oscillator Types
OSC1/OSC2 as primary; ECPLL
oscillator with PLL enabled, CLKO on
RA6
OSC1/OSC2 as primary; external
clock with F
OSC1/OSC2 as primary; high-speed
crystal/resonator with software PLL
control
OSC1/OSC2 as primary; high-speed
crystal/resonator
PLL control, F
and I/O on RA7
Internal oscillator block with F
output on RA6 and I/O on RA7
PLL control and I/O on RA6 and RA7
Internal oscillator block with I/O on
RA6 and RA7
Primary Oscillator
Secondary Oscillator
PIC18F87J90 FAMILY CLOCK DIAGRAM
OSCCON<6:4>
Oscillator
OSC
Internal
Source
Source
INTRC
8 MHz
Block
T1OSCEN
Enable
Oscillator
Sleep
OSC
/4 output
/4 output on RA6
31 kHz (INTRC)
(INTOSC)
OSCTUNE<6>
8 MHz
OSC
/4
1
0
500 kHz
250 kHz
125 kHz
31 kHz
8 MHz
4 MHz
2 MHz
1 MHz
PIC18F87J90 FAMILY
OSCCON<6:4>
All of these modes are selected by the user by
programming the FOSC<2:0> Configuration bits.
In addition, PIC18F87J90 family devices can switch
between different clock sources, either under software
control or automatically under certain conditions. This
allows for additional power savings by managing
device clock speed in real time without resetting the
application.
The clock sources for the PIC18F87J90 family of
devices are shown in Figure 3-1.
4 x PLL
OSCTUNE<7>
111
110
101
100
011
010
001
000
HSPLL, ECPLL, INTPLL
Internal Oscillator
FOSC<2:0>
HS, EC
T1OSC
Clock Source Option
for Other Modules
WDT, PWRT, FSCM
and Two-Speed Start-up
Control
Clock
OSCCON<1:0>
DS39933D-page 35
Peripherals
IDLEN
CPU