PIC18F2431-E/SO Microchip Technology, PIC18F2431-E/SO Datasheet - Page 25

• Manufacturer Part Number: PIC18F2431-E/SO
• Description: IC MCU FLASH 8KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2431-E/SO

• Core Size: 8-Bit
• Program Memory Size: 16KB (8K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC18
• No. Of I/o's: 24
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 768Byte
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: I3-DB18F4431 - BOARD DAUGHTER ICEPIC3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

2.0
2.1
The PIC18F2331/2431/4331/4431 devices can be
operated in 10 different oscillator modes. The user can
program the Configuration bits FOSC3:FOSC0 in
Configuration Register 1H to select one of these 10
modes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. ECIO
2.2
In XT, LP, HS or HSPLL Oscillator modes, a crystal or
ceramic resonator is connected to the OSC1 and
OSC2 pins to establish oscillation. Figure 2-1 shows
the pin connections.
The oscillator design requires the use of a parallel cut
crystal.
© 2007 Microchip Technology Inc.
Note:
LP
XT
HS
HSPLL
RC
RCIO
INTIO1
INTIO2
EC
OSCILLATOR
CONFIGURATIONS
Oscillator Types
Crystal Oscillator/Ceramic
Resonators
Use of a series cut crystal may give a
frequency
manufacturers’ specifications.
F
Low-Power Crystal
Crystal/Resonator
High-Speed Crystal/Resonator
High-Speed Crystal/Resonator
with PLL Enabled
External Resistor/Capacitor with
External Resistor/Capacitor with
Internal Oscillator with F
Output on RA6 and I/O on RA7
Internal Oscillator with I/O on RA6
and RA7
External Clock with F
External Clock with I/O on RA6
I/O on RA6
OSC
/4 Output on RA6
out
of
OSC
the
/4 Output
PIC18F2331/2431/4331/4431
OSC
crystal
/4
Preliminary
FIGURE 2-1:
TABLE 2-1:
Capacitor values are for design guidance only.
These capacitors were tested with the resonators
listed below for basic start-up and operation. These
values are not optimized.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
V
See the notes following Table 2-2 for additional
information.
Note 1: See Table 2-1 and Table 2-2 for initial values of
DD
Mode
HS
XT
and temperature range for the application.
2: A series resistor (R
3: R
C1
C2
455 kHz
2.0 MHz
(1)
(1)
Typical Capacitor Values Used:
C1 and C2.
strip cut crystals.
F
16.0 MHz
varies with the oscillator mode chosen.
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
XTAL
R
Freq
S
(2)
Resonators Used:
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
OSC2
OSC1
16.0 MHz
CRYSTAL/CERAMIC
RESONATOR OPERATION
(XT, LP, HS OR HSPLL
CONFIGURATION)
S
) may be required for AT
OSC1
56 pF
47 pF
33 pF
27 pF
22 pF
R
F (3)
PIC18FXXXX
4.0 MHz
8.0 MHz
DS39616C-page 23
Sleep
OSC2
56 pF
47 pF
33 pF
27 pF
22 pF
To
Internal
Logic