PIC18LF2410-I/SO Microchip Technology, PIC18LF2410-I/SO Datasheet - Page 234

• Manufacturer Part Number: PIC18LF2410-I/SO
• Description: IC MCU FLASH 8KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2410-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, HLVD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 10x10b
• 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: 25
• Ram Memory Size: 768Byte
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Interface: I2C, SPI, USART
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC18F2X1X/4X1X
FIGURE 21-3:
21.5
In many applications, the ability to detect a drop below
or rise above a particular threshold is desirable. For
example, the HLVD module could be periodically
enabled to detect a Universal Serial Bus (USB) attach
or detach. This assumes the device is powered by a
lower voltage source than the USB when detached. An
attach would indicate a high-voltage detect from, for
example, 3.3V to 5V (the voltage on USB) and vice
versa for a detach. This feature could save a design a
few extra components and an attach signal (input pin).
For general battery applications, Figure 21-4 shows a
possible voltage curve. Over time, the device voltage
decreases. When the device voltage reaches voltage
V
The interrupt could cause the execution of an ISR,
which would allow the application to perform “house-
keeping tasks” and perform a controlled shutdown
before the device voltage exits the valid operating
range at T
a time window, represented by the difference between
T
DS39636D-page 236
A
A
, the HLVD logic generates an interrupt at time T
and T
CASE 1:
CASE 2:
B
Applications
Enable HLVD
, to safely exit.
B
Enable HLVD
. The HLVD thus would give the application
HLVDIF
HLVDIF
IRVST
IRVST
V
V
DD
DD
HIGH-VOLTAGE DETECT OPERATION (VDIRMAG =
HLVDIF may not be set
Internal Reference is stable
Internal Reference is stable
A
T
T
.
IVRST
IVRST
FIGURE 21-4:
HLVDIF cleared in software,
HLVDIF remains set since HLVD condition still exists
V
V
A
B
Legend:
V
V
HLVDIF cleared in software
A
B
1
= HLVD trip point
= Minimum valid device
)
TYPICAL
HIGH/LOW-VOLTAGE
DETECT APPLICATION
operating voltage
© 2009 Microchip Technology Inc.
Time
HLVDIF cleared in software
T
A
V
V
LVD
LVD
T
B