PIC18LF6310T-I/PT Microchip Technology, PIC18LF6310T-I/PT Datasheet - Page 278

• Manufacturer Part Number: PIC18LF6310T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,64PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF6310T-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F6310/6410/8310/8410
FIGURE 23-3:
23.5
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 USB attach or detach. This assumes
the device is powered by a lower voltage source than
the Universal Serial Bus (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,
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
DS39635C-page 278
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/LOW-VOLTAGE DETECT OPERATION (VDIRMAG =
HLVDIF may not be set
Internal Reference is stable
Figure 23-4
shows a
Internal Reference is stable
A
T
T
.
IRVST
IRVST
FIGURE 23-4:
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
= HLVD trip point
= Minimum valid device
TYPICAL LOW-VOLTAGE
DETECT APPLICATION
operating voltage
 2010 Microchip Technology Inc.
Time
HLVDIF cleared in software
1
)
T
A
V
V
LVD
LVD
T
B