PIC18F4580-I/P Microchip Technology Inc., PIC18F4580-I/P Datasheet - Page 20

• Manufacturer Part Number: PIC18F4580-I/P
• Description: 40 PIN, 32 KB FLASH, 1536 RAM, 36 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4580-I/P

• A/d Inputs: 11-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 36
• Interface: CAN/I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 32K Bytes
• Ram Size: 1.5K Bytes
• Speed: 40 MHz
• Timers: 1-8 bit, 3-16 bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

TABLE 2-2:
DS41159D-page 18
PIC18FXX8
LP
XT
HS
These values are for design guidance only.
See notes on this page.
Osc Type
20.0 MHz EPSON CA-301 20.000M-C
32.0 kHz
1.0 MHz
4.0 MHz
8.0 MHz
200 kHz
Note 1: Recommended values of C1 and C2 are
2: Higher capacitance increases the stability
3: Since each resonator/crystal has its own
4: Rs may be required in HS mode, as well
identical to the ranges tested (Table 2-1).
of the oscillator but also increases the
start-up time.
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate
components.
as XT mode, to avoid overdriving crystals
with low drive level specification.
EPSON CA-301 8.000M-C
Epson C-001R32.768K-A
20.0 MHz
25.0 MHz
32.0 kHz
200 kHz
200 kHz
1.0 MHz
4.0 MHz
4.0 MHz
8.0 MHz
Crystal
STD XTL 200.000KHz
Freq
ECS ECS-10-13-1
ECS ECS-40-20-1
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
Crystals Used
Cap. Range
values
47-68 pF
15-33 pF
15-33 pF
15-33 pF
33 pF
15 pF
15 pF
15 pF
15 pF
C1
of
Cap. Range
±20 PPM
±20 PPM
±50 PPM
±50 PPM
±30 PPM
±30 PPM
47-68 pF
15-33 pF
15-33 pF
15-33 pF
33 pF
15 pF
15 pF
15 pF
15 pF
external
C2
process parameter variation. Furthermore, the differ-
combination is connected.
2.3
For timing insensitive applications, the “RC” and “RCIO”
device options offer additional cost savings. The RC
oscillator frequency is a function of the supply voltage,
the resistor (R
operating temperature. In addition to this, the oscillator
frequency will vary from unit to unit due to normal
ence in lead frame capacitance between package types
will also affect the oscillation frequency, especially for
low C
account variation due to tolerance of external R and C
components used. Figure 2-2 shows how the RC
In the RC Oscillator mode, the oscillator frequency
divided by 4 is available on the OSC2 pin. This signal
may be used for test purposes or to synchronize other
logic.
FIGURE 2-2:
The RCIO Oscillator mode functions like the RC mode,
except that the OSC2 pin becomes an additional
general purpose I/O pin. The I/O pin becomes bit 6 of
PORTA (RA6).
C
V
Note:
Recommended values:
R
EXT
SS
EXT
EXT
V
DD
RC Oscillator
values. The user also needs to take into
If the oscillator frequency divided by 4
signal is not required in the application, it
is recommended to use RCIO mode to
save current.
F
EXT
OSC
) and capacitor (C
/4
RC OSCILLATOR MODE
OSC1
OSC2/CLKO
 2004 Microchip Technology Inc.
3 k
C
EXT
> 20 pF
PIC18FXX8
R
EXT
EXT
100 k
) values and the
Internal
Clock