MA180025 Microchip Technology, MA180025 Datasheet - Page 36

• 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

PIC18F87J90 FAMILY
3.2
The OSCCON register (Register 3-1) controls the main
aspects of the device clock’s operation. It selects the
oscillator type to be used, which of the power-managed
modes to invoke and the output frequency of the
INTOSC source. It also provides status on the oscillators.
REGISTER 3-1:
DS39933D-page 36
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-4
bit 3
bit 2
bit 1-0
Note 1:
IDLEN
R/W-0
2:
3:
4:
Control Registers
Reset state depends on the state of the IESO Configuration bit.
Modifying these bits will cause an immediate clock frequency switch if the internal oscillator is providing
the device clocks.
Source selected by the INTSRC bit (OSCTUNE<7>), see text.
Modifying these bits will cause an immediate clock source switch.
IDLEN: Idle Enable bit
1 = Device enters an Idle mode when a SLEEP instruction is executed
0 = Device enters Sleep mode when a SLEEP instruction is executed
IRCF<2:0>: INTOSC Source Frequency Select bits
111 = 8 MHz (INTOSC drives clock directly)
110 = 4 MHz (default)
101 = 2 MHz
100 = 1 MHz
011 = 500 kHz
010 = 250 kHz
001 = 125 kHz
000 = 31 kHz (from either INTOSC/256 or INTRC)
OSTS: Oscillator Start-up Timer Time-out Status bit
1 = Oscillator Start-up Timer (OST) time-out has expired; primary oscillator is running
0 = Oscillator Start-up Timer (OST) time-out is running; primary oscillator is not ready
IOFS: INTOSC Frequency Stable bit
1 = Fast RC oscillator frequency is stable
0 = Fast RC oscillator frequency is not stable
SCS<1:0>: System Clock Select bits
11 = Internal oscillator block
10 = Primary oscillator
01 = Timer1 oscillator
00 = Default primary oscillator (as defined by the FOSC<2:0> Configuration bits)
IRCF2
R/W-1
OSCCON: OSCILLATOR CONTROL REGISTER
(2)
W = Writable bit
‘1’ = Bit is set
IRCF1
R/W-1
(2)
IRCF0
R/W-0
(4)
(2)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
OSTS
The OSCTUNE register (Register 3-2) controls the
tuning and operation of the internal oscillator block. It
also implements the PLLEN bits which control the
operation of the Phase Locked Loop (PLL) (see
Section 3.4.3 “PLL Frequency Multiplier”).
R
(1)
(3)
(2)
(1)
IOFS
R-0
 2010 Microchip Technology Inc.
x = Bit is unknown
SCS1
R/W-0
(4)
SCS0
R/W-0
(4)
bit 0