PIC18LF2523-I/SP Microchip Technology, PIC18LF2523-I/SP Datasheet - Page 26

• Manufacturer Part Number: PIC18LF2523-I/SP
• Description: IC PIC MCU FLASH 16KX16 28-DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2523-I/SP

• Core Size: 8-Bit
• Program Memory Size: 32KB (16K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 10x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Controller Family/series: PIC18
• No. Of I/o's: 25
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 1.5KB
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Package: 28SPDIP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 25
• Interface Type: I2C/SPI/USART
• On-chip Adc: 10-chx12-bit
• Number Of Timers: 4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F2423/2523/4423/4523
TABLE 2-2:
DS39755B-page 24
Capacitor values are for design guidance only.
These capacitors were tested with the crystals 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 this table for additional
information.
DD
Note 1: When operating below 3V V
Type
Osc.
XT
HS
LP
and temperature range for the application.
2: Since each resonator/crystal has its own
3: R
4: Always verify oscillator performance over
25 MHz
32 kHz
1 MHz
using ceramic resonators above 3.6 MHz
at any voltage, it may be necessary to use
the HS mode or switch to a crystal
oscillator.
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate
components.
tuning fork crystals, such as those com-
monly used in LP mode or with the Timer1
oscillator. R
crystal drive in other modes where
waveform distortion could be an issue.
See AN949, “Making Your Oscillator
Work”.
the V
expected for the application. See AN949,
“Making Your Oscillator Work” for testing
methods.
S
10 MHz
20 MHz
25 MHz
Crystal
32 kHz
1 MHz
4 MHz
4 MHz
Freq.
may be required to avoid overdriving
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
DD
Crystals Used:
and temperature range that is
S
may also be used to reduce
Typical Capacitor Values
values
18 pF
15 pF
15 pF
15 pF
15 pF
15 pF
15 pF
C1
Tested:
10 MHz
20 MHz
4 MHz
of
DD
, or when
18 pF
15 pF
15 pF
15 pF
15 pF
15 pF
15 pF
external
C2
Preliminary
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:
2.3
The EC and ECIO Oscillator modes require an external
clock source to be connected to the OSC1 pin. There is
no oscillator start-up time required after a Power-on
Reset or after an exit from Sleep mode.
In the EC 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 2-3 shows the pin connections for the EC
Oscillator mode.
FIGURE 2-3:
The ECIO Oscillator mode functions like the EC mode,
except that the OSC2 pin becomes an additional gen-
eral purpose I/O pin. The I/O pin becomes bit 6 of
PORTA (RA6). Figure 2-4 shows the pin connections
for the ECIO Oscillator mode.
FIGURE 2-4:
Clock from
Ext. System
Clock from
Ext. System
Clock from
Ext. System
External Clock Input
F
RA6
OSC
Open
/4
EXTERNAL CLOCK INPUT
OPERATION (HS OSC.
CONFIGURATION)
EXTERNAL CLOCK
INPUT OPERATION
(EC CONFIGURATION)
EXTERNAL CLOCK
INPUT OPERATION
(ECIO CONFIGURATION)
© 2007 Microchip Technology Inc.
OSC1/CLKI
OSC2/CLKO
OSC1/CLKI
I/O (OSC2)
OSC1
OSC2
PIC18FXXXX
PIC18FXXXX
PIC18FXXXX
(HS Mode)