PIC18LF2431-I/SO Microchip Technology, PIC18LF2431-I/SO Datasheet - Page 50
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PIC18LF2431-I/SO
Manufacturer Part Number
PIC18LF2431-I/SO
Description
IC MCU FLASH 8KX16 28SOIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16LF627A-IP.pdf
(8 pages)
3.PIC16F818-ISO.pdf
(6 pages)
4.PIC18F2331-ISO.pdf
(392 pages)
5.PIC18F2331-ISO.pdf
(8 pages)
6.PIC18F2331-ISO.pdf
(6 pages)
7.PIC18F2331-ISO.pdf
(16 pages)
8.PIC18LF2331-ISO.pdf
(4 pages)
9.PIC18LF2331-ISO.pdf
(40 pages)
10.PIC18F4331-EP.pdf
(400 pages)
Specifications of PIC18LF2431-I/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)
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)
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
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
EUSART, I2C, SPI, SSP
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
24
Number Of Timers
1 x 8
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
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DM183021, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
5 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18LF2431-I/SO
Manufacturer:
BOURNS
Quantity:
30 000
- PIC16F616T-ISL PDF datasheet
- PIC16LF627A-IP PDF datasheet #2
- PIC16F818-ISO PDF datasheet #3
- PIC18F2331-ISO PDF datasheet #4
- PIC18F2331-ISO PDF datasheet #5
- PIC18F2331-ISO PDF datasheet #6
- PIC18F2331-ISO PDF datasheet #7
- PIC18LF2331-ISO PDF datasheet #8
- PIC18LF2331-ISO PDF datasheet #9
- PIC18F4331-EP PDF datasheet #10
- Current page: 50 of 392
- Download datasheet (4Mb)
PIC18F2331/2431/4331/4431
5.5
PIC18F2331/2431/4331/4431
three separate on-chip timers that help regulate the
Power-on Reset process. Their main function is to
ensure that the device clock is stable before code is
executed. These timers are:
• Power-up Timer (PWRT)
• Oscillator Start-up Timer (OST)
• PLL Lock Time-out
5.5.1
The Power-up Timer (PWRT) of PIC18F2331/2431/
4331/4431 devices is an 11-bit counter that uses the
INTRC source as the clock input. This yields an
approximate time interval of 2,048 x 32 s = 65.6 ms.
While the PWRT is counting, the device is held in
Reset. The power-up time delay depends on the
INTRC clock and will vary from chip to chip due to tem-
perature and process variation. See DC Parameter 33
for details.
The PWRT is enabled by clearing the PWRTEN
Configuration bit.
5.5.2
The Oscillator Start-up Timer (OST) provides a
1,024 oscillator cycle (from OSC1 input) delay after the
PWRT delay is over (Parameter 33). This ensures that
the crystal oscillator or resonator has started and
stabilized.
The OST time-out is invoked only for XT, LP, HS and
HSPLL modes, and on Power-on Reset or on exit from
most power-managed modes.
TABLE 5-1:
DS39616D-page 50
HSPLL
HS, XT, LP
EC, ECIO
RC, RCIO
INTIO1, INTIO2
Note 1:
Configuration
2:
Oscillator
Device Reset Timers
66 ms (65.5 ms) is the nominal Power-up Timer (PWRT) delay.
2 ms is the nominal time required for the 4x PLL to lock.
POWER-UP TIMER (PWRT)
OSCILLATOR START-UP TIMER
(OST)
TIME-OUT IN VARIOUS SITUATIONS
66 ms
66 ms
(1)
devices
PWRTEN = 0
+ 1024 T
(1)
66 ms
66 ms
66 ms
+ 1024 T
incorporate
Power-up
OSC
(1)
(1)
(1)
+ 2 ms
OSC
(2)
(2)
and Brown-out
5.5.3
With the PLL enabled in its PLL mode, the time-out
sequence following a Power-on Reset is slightly differ-
ent from other oscillator modes. A separate timer is
used to provide a fixed time-out that is sufficient for the
PLL to lock to the main oscillator frequency. This PLL
Lock Time-out (T
oscillator start-up time-out.
5.5.4
On power-up, the time-out sequence is as follows:
1.
2.
The total time-out will vary based on oscillator configu-
ration and the status of the PWRT.
Figure 5-7
with the Power-up Timer enabled and the device oper-
ating in HS Oscillator mode.
Figure 5-6
modes.
For devices in RC mode, and with the PWRT disabled,
there will be no time-out at all. Since the time-outs
occur from the POR pulse, if MCLR is kept low long
enough, all time-outs will expire. Bringing MCLR high
will begin execution immediately
useful for testing purposes or synchronization of more
than one PIC18FXXXX device operating in parallel.
1024 T
PWRTEN = 1
After the POR pulse has cleared, the PWRT time-out
is invoked (if enabled).
Then, the OST is activated.
1024 T
OSC
—
—
—
also apply to devices operating in XT or LP
depict time-out sequences on power-up,
PLL LOCK TIME-OUT
TIME-OUT SEQUENCE
+ 2 ms
OSC
PLL
(2)
) is typically 2 ms and follows the
2010 Microchip Technology Inc.
Power-Managed Mode
1024 T
(Figure
Figure 5-3
1024 T
Exit From
Figure 5-3
OSC
—
—
—
5-5). This is
+ 2 ms
OSC
through
through
(2)
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