PIC18F1220-I/SO Microchip Technology Inc., PIC18F1220-I/SO Datasheet - Page 13

• Manufacturer Part Number: PIC18F1220-I/SO
• Description: Microcontroller; 4 KB Flash; 256 RAM; 256 EEPROM; 16 I/O; 18-Pin-SOIC
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F1220-I/SO

• A/d Inputs: 7-Channel, 10-Bit
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 16
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin SOIC
• Programmable Memory: 4K Bytes
• Ram Size: 256 Bytes
• Speed: 20 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

2.0
2.1
The PIC18F1220 and PIC18F1320 devices can be
operated in ten different oscillator modes. The user can
program the configuration bits, FOSC3:FOSC0, in
Configuration Register 1H to select one of these ten
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.
 2004 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 out of the crystal manufacturer’s
specifications.
with PLL enabled
F
output on RA6 and I/O on RA7
and RA7
Low-Power Crystal
Crystal/Resonator
High-Speed Crystal/Resonator
High-Speed Crystal/Resonator
External Resistor/Capacitor with
External Resistor/Capacitor with
I/O on RA6
Internal Oscillator with F
Internal Oscillator with I/O on RA6
External Clock with F
External Clock with I/O on RA6
OSC
/4 output on RA6
OSC
OSC
/4 output
/4
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
DD
Mode
HS
XT
and temperature range for the application.
C1
C2
2: A series resistor (R
3: R
455 kHz
2.0 MHz
PIC18F1220/1320
(1)
(1)
Typical Capacitor Values Used:
values of C1 and C2.
AT strip cut crystals.
F
16.0 MHz
XTAL
R
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
varies with the oscillator mode chosen.
S
Freq
(2)
Resonators Used:
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
OSC2
OSC1
16.0 MHz
CRYSTAL/CERAMIC
RESONATOR OPERATION
(XT, LP, HS OR HSPLL
CONFIGURATION)
OSC1
56 pF
47 pF
33 pF
27 pF
22 pF
R
S
) may be required for
F
(3)
4.0 MHz
8.0 MHz
DS39605C-page 11
PIC18FXXXX
Sleep
OSC2
56 pF
47 pF
33 pF
27 pF
22 pF
To
Internal
Logic