PIC18LF4331-I/P Microchip Technology, PIC18LF4331-I/P Datasheet - Page 265
![IC PIC MCU FLASH 4KX16 40DIP](/photos/6/61/66192/150-40-dip_sml.jpg)
PIC18LF4331-I/P
Manufacturer Part Number
PIC18LF4331-I/P
Description
IC PIC MCU FLASH 4KX16 40DIP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F818-ISO.pdf
(6 pages)
3.PIC18F2331-ISO.pdf
(392 pages)
4.PIC18F2331-ISO.pdf
(8 pages)
5.PIC18F2331-ISO.pdf
(6 pages)
6.PIC18F2331-ISO.pdf
(16 pages)
7.PIC18LF2331-ISO.pdf
(4 pages)
8.PIC18LF2331-ISO.pdf
(40 pages)
9.PIC18F4331-EP.pdf
(400 pages)
Specifications of PIC18LF4331-I/P
Core Size
8-Bit
Program Memory Size
8KB (4K 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
36
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 9x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Controller Family/series
PIC18
No. Of I/o's
36
Eeprom Memory Size
256Byte
Ram Memory Size
768Byte
Cpu Speed
40MHz
No. Of Timers
4
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18LF4331-I/P
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Company:
Part Number:
PIC18LF4331-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F818-ISO PDF datasheet #2
- PIC18F2331-ISO PDF datasheet #3
- PIC18F2331-ISO PDF datasheet #4
- PIC18F2331-ISO PDF datasheet #5
- PIC18F2331-ISO PDF datasheet #6
- PIC18LF2331-ISO PDF datasheet #7
- PIC18LF2331-ISO PDF datasheet #8
- PIC18F4331-EP PDF datasheet #9
- Current page: 265 of 400
- Download datasheet (7Mb)
21.0
In many applications, the ability to determine if the
device voltage (V
is a desirable feature. A window of operation for the
application can be created, where the application
software can do “housekeeping tasks” before the
device voltage exits the valid operating range. This can
be done using the Low-Voltage Detect module (LVD).
This module is a software programmable circuitry,
where a device voltage trip point can be specified.
When the voltage of the device becomes lower than the
specified point, an interrupt flag is set. If the interrupt is
enabled, the program execution will branch to the
interrupt vector address and the software can then
respond to that interrupt source.
The Low-Voltage Detect circuitry is completely under
software control. This allows the circuitry to be turned
off by the software, which minimizes the current
consumption for the device.
Figure 21-1 shows a possible application voltage curve
(typically for batteries). Over time, the device voltage
decreases. When the device voltage equals voltage V
the LVD logic generates an interrupt. This occurs at
time T
FIGURE 21-1:
© 2007 Microchip Technology Inc.
A
. The application software then has the time,
LOW-VOLTAGE DETECT
V
V
A
B
DD
) is below a specified voltage level
TYPICAL LOW-VOLTAGE DETECT APPLICATION
Time
T
A
PIC18F2331/2431/4331/4431
T
B
Preliminary
A
,
until the device voltage is no longer in valid operating
range, to shut down the system. Voltage point V
minimum valid operating voltage specification. This
occurs at time T
time for shutdown.
The block diagram for the LVD module is shown in
Figure 21-2. A comparator uses an internally gener-
ated reference voltage as the set point. When the
selected tap output of the device voltage crosses the
set point (is lower than), the LVDIF bit is set.
Each node in the resistor divider represents a “trip
point” voltage. The “trip point” voltage is the minimum
supply voltage level at which the device can operate
before the LVD module asserts an interrupt. When the
supply voltage is equal to the trip point, the voltage
tapped off of the resistor array is equal to the 1.2V
internal reference voltage generated by the voltage
reference module. The comparator then generates an
interrupt signal setting the LVDIF bit. This voltage is
software programmable to any one of 16 values (see
Figure 21-2). The trip point is selected by programming
the LVDL3:LVDL0 bits (LVDCON<3:0>).
Legend:
B
. The difference, T
V
V
A
B
= LVD trip point
= Minimum valid device
operating voltage
DS39616C-page 263
B
– T
A
, is the total
B
is the
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