PIC18LF2539T-I/SO Microchip Technology, PIC18LF2539T-I/SO Datasheet - Page 21

• Manufacturer Part Number: PIC18LF2539T-I/SO
• Description: IC MCU FLASH 12KX16 EE AD 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2539T-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Size: 24KB (12K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1408 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: PIC18LF
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1408 B
• Interface Type: I2C, SPI, AUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 21
• Number Of Timers: 16 bit
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: DV164005, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.0
2.1
The PIC18FXX39 can be operated in four different
Oscillator modes at a frequency of 20 MHz. The user
can program three configuration bits (FOSC2, FOSC1,
and FOSC0) to select one of these four modes:
1.
2.
3.
4.
2.2
In HS or HS+PLL Oscillator modes, a crystal or ceramic
resonator is connected to the OSC1 and OSC2 pins to
establish
connections.
The PIC18FXX39 oscillator design requires the use of
a parallel cut crystal.
 2002 Microchip Technology Inc.
Note:
Note:
HS
HS + PLL
EC
ECIO
OSCILLATOR
CONFIGURATIONS
Oscillator Types
Crystal Oscillator/Ceramic
Resonators
The operation of the Motor Control kernel
and its APIs (Section 14.0) is based on an
assumed clock frequency of 20 MHz.
Changing the oscillator frequency will
change the timing used in the Motor Con-
trol kernel accordingly. To achieve the best
results in motor control applications, a
clock frequency of 20 MHz is highly
recommended.
oscillation.
Use of a series cut crystal may give a fre-
quency out of the crystal manufacturers
specifications.
with PLL enabled using 5 MHz
crystal
enabled
High Speed Crystal/Resonator
High Speed Crystal/Resonator
External Clock
External
Figure 2-1
Clock
with
shows
I/O
the
pin
Preliminary
pin
FIGURE 2-1:
An external clock source may also be connected to the
OSC1 pin in the HS mode, as shown in Figure 2-2.
FIGURE 2-2:
Clock from
Ext. System
Note 1: Higher capacitance increases the stability
Note 1: See Table 2-1 for recommended values of
C1
C2
2: Since each resonator/crystal has its own
(1)
(1)
2: A series resistor (R
3: R
of the oscillator, but also increases the
start-up time.
characteristics, the user should consult the
resonator/crystal manufacturer for appro-
priate values of external components, or
verify oscillator performance.
C1 and C2.
AT strip cut crystals.
XTAL
R
Open
F
S (2)
varies with the Oscillator mode chosen.
OSC2
OSC1
PIC18FXX39
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS CONFIGURATION)
EXTERNAL CLOCK INPUT
OPERATION (HS OSC
CONFIGURATION)
OSC1
OSC2
R
S
F
) may be required for
(3)
PIC18FXX39
DS30485A-page 19
PIC18FXX39
SLEEP
To
Internal
Logic