MA160014 Microchip Technology, MA160014 Datasheet - Page 36

• Manufacturer Part Number: MA160014
• Description: MOD PLUG-IN 44PIN PIC18LF45K22
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of MA160014

• Accessory Type: Plug-In Module (PIM) - PIC18LF45K10
• Product: Microcontroller Modules
• Data Bus Width: 8 bit
• Core Processor: PIC18LF45K22
• Interface Type: I2C, SPI
• Operating Supply Voltage: 1.8 V to 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM PIC18 Explorer, DM183032
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18(L)F2X/4XK22
2.4.4
The external Resistor-Capacitor (RC) modes support
the use of an external RC circuit. This allows the
designer maximum flexibility in frequency choice while
keeping costs to a minimum when clock accuracy is not
required. There are two modes: RC and RCIO.
2.4.4.1
In RC mode, the RC circuit connects to OSC1. OSC2/
CLKOUT outputs the RC oscillator frequency divided
by 4. This signal may be used to provide a clock for
external circuitry, synchronization, calibration, test or
other application requirements.
external RC mode connections.
FIGURE 2-8:
2.4.4.2
In RCIO mode, the RC circuit is connected to OSC1.
OSC2 becomes a general purpose I/O pin.
The RC oscillator frequency is a function of the supply
voltage, the resistor (R
and the operating temperature. Other factors affecting
the oscillator frequency are:
• input threshold voltage variation
• component tolerances
• packaging variations in capacitance
The user also needs to take into account variation due
to tolerance of external RC components used.
DS41412D-page 36
R
C
Note 1:
V
Recommended values: 10 k  R
EXT
EXT
SS
V
F
I/O
DD
OSC
(2)
2:
/4 or
EXTERNAL RC MODES
Alternate pin functions are listed in
Section 1.0 “Device
Output depends upon RC or RCIO clock mode.
RC Mode
RCIO Mode
OSC1/CLKIN
OSC2/CLKOUT
EXT
EXTERNAL RC MODES
C
EXT
) and capacitor (C
> 20 pF
PIC
Overview”.
Figure 2-8
EXT
®
(1)
MCU
 100 k
EXT
shows the
Internal
Clock
) values
Preliminary
2.5
The oscillator module has three independent, internal
oscillators that can be configured or selected as the
system clock source.
1.
2.
3.
The system clock speed can be selected via software
using the Internal Oscillator Frequency select bits
IRCF<2:0> of the OSCCON register.
The system clock can be selected between external or
internal clock sources via the System Clock Selection
(SCS<1:0>) bits of the OSCCON register. See
Section 2.9 “Clock Switching”
2.5.1
Two of the clock modes selectable with the
FOSC<3:0> bits of the CONFIG1H Configuration
register configure the internal oscillator block as the
primary oscillator. Mode selection determines whether
OSC2/CLKOUT/RA7 will be configured as general
purpose I/O (RA7) or F
modes, OSC1/CLKIN/RA7 is configured as general
purpose I/O. See
the CPU”
The CLKOUT signal may be used to provide a clock for
external circuitry, synchronization, calibration, test or
other application requirements.
The
Oscillator) is factory calibrated and operates at
16 MHz. The frequency of the HFINTOSC can
be
OSCTUNE register
The MFINTOSC (Medium-Frequency Internal
Oscillator) is factory calibrated and operates
at 500 kHz. The frequency of the MFINTOSC
can be user-adjusted via software using the
OSCTUNE register
The
Oscillator) is factory calibrated and operates at
31.25 kHz. The LFINTOSC cannot be user-
adjusted, but is designed to be stable over
temperature and voltage.
Internal Clock Modes
INTOSC WITH I/O OR CLOCKOUT
user-adjusted
for more information.
HFINTOSC
LFINTOSC
Section 24.0 “Special Features of
 2010 Microchip Technology Inc.
(Register
(High-Frequency
(Register
via software using the
(Low-Frequency
OSC
/4 (CLKOUT). In both
for more information.
2-3).
2-3).
Internal
Internal