PIC18F6490-I/PT Microchip Technology, PIC18F6490-I/PT Datasheet - Page 253

• Manufacturer Part Number: PIC18F6490-I/PT
• Description: IC PIC MCU FLASH 8KX16 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F6490-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 16KB (8K x 16)
• Package / Case: 64-TFQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
• Number Of I /o: 50
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SPI/I2C/EUSART/AUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 50
• Number Of Timers: 4
• Operating Supply Voltage: 4.2 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, DV164136, DM183028
• Minimum Operating Temperature: - 25 C
• On-chip Adc: 12-ch x 10-bit
• Package: 64TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT64PT5 - SOCKET TRAN ICE 64MQFP/TQFPDM163028 - BOARD DEMO PICDEM LCDAC164319 - MODULE SKT MPLAB PM3 64TQFPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

21.0
PIC18F6390/6490/8390/8490
High/Low-Voltage Detect module (HLVD). This is a pro-
grammable circuit that allows the user to specify both a
device voltage trip point and the direction of change
from that point. If the device experiences an excursion
past the trip point in that direction, 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 the interrupt.
REGISTER 21-1:
 2004 Microchip Technology Inc.
HIGH/LOW-VOLTAGE
DETECT (HLVD)
bit 7
bit 6
bit 5
bit 4
bit 3-0
HLVDCON: HIGH/LOW-VOLTAGE DETECT CONTROL REGISTER
bit 7
VDIRMAG: Voltage Direction Magnitude Select bit
1 = Event occurs when voltage equals or exceeds trip point (HLVDL3:HLVDL0)
0 = Event occurs when voltage equals or falls below trip point (HLVDL3:HLVDL0)
Unimplemented: Read as ‘0’
IRVST: Internal Reference Voltage Stable Flag bit
1 = Indicates that the Voltage Detect logic will generate the interrupt flag at the specified
0 = Indicates that the Voltage Detect logic will not generate the interrupt flag at the specified
HLVDEN: High/Low-Voltage Detect Power Enable bit
1 = HLVD enabled
0 = HLVD disabled
HLVDL3:HLVDL0: Voltage Detection Limit bits
1111 = External analog input is used (input comes from the HLVDIN pin)
1110 = 4.41V-4.87V
1101 = 4.11V-4.55V
1100 = 3.92V-4.34V
1011 = 3.72V-4.12V
1010 = 3.53V-3.91V
1001 = 3.43V-3.79V
1000 = 3.24V-3.58V
0111 = 2.95V-3.26V
0110 = 2.75V-3.03V
0101 = 2.64V-2.92V
0100 = 2.43V-2.69V
0011 = 2.35V-2.59V
0010 = 2.16V-2.38V
0001 = 1.96V-2.16V
0000 = Reserved
VDIRMAG
Legend:
R = Readable bit
-n = Value at POR
R/W-0
Note 1: HLVDL3:HLVDL0 modes that result in a trip point below the valid operating voltage
voltage range
voltage range and the HLVD interrupt should not be enabled
devices
of the device are not tested.
U-0
—
have
PIC18F6390/6490/8390/8490
IRVST
R-0
Preliminary
W = Writable bit
‘1’ = Bit is set
a
HLVDEN HLVDL3
R/W-0
The
(Register 21-1) completely controls the operation of the
HLVD module. This allows the circuitry to be “turned
off” by the user under software control, which
minimizes the current consumption for the device.
The block diagram for the HLVD module is shown in
Figure 21-1.
(1)
High/Low-Voltage
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
(1)
HLVDL2
R/W-1
(1)
Detect
HLVDL1
x = Bit is unknown
R/W-0
DS39629B-page 251
Control
(1)
HLVDL0
R/W-1
register
bit 0
(1)