PIC18F458T-I/PT Microchip Technology, PIC18F458T-I/PT Datasheet - Page 263

• Manufacturer Part Number: PIC18F458T-I/PT
• Description: IC MCU FLASH 16KX16 W/CAN 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F458T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

23.1
The Low-Voltage Detect Control register controls the
operation of the Low Voltage Detect circuitry.
REGISTER 23-1:
© 2006 Microchip Technology Inc.
Control Register
bit 7-6
bit 5
bit 4
bit 3-0
LVDCON: LOW-VOLTAGE DETECT CONTROL REGISTER
bit 7
Unimplemented: Read as ‘0’
IRVST: Internal Reference Voltage Stable Flag bit
1 = Indicates that the Low-Voltage Detect logic will generate the interrupt flag at the specified
0 = Indicates that the Low-Voltage Detect logic will not generate the interrupt flag at the
LVDEN: Low-Voltage Detect Power Enable bit
1 = Enables LVD, powers up LVD circuit
0 = Disables LVD, powers down LVD circuit
LVDL3:LVDL0: Low-Voltage Detection Limit bits
1111 = External analog input is used (input comes from the LVDIN pin)
1110 = 4.45V min.-4.83V max.
1101 = 4.16V min.-4.5V max.
1100 = 3.96V min.-4.2V max.
1011 = 3.76V min.-4.08V max.
1010 = 3.57V min.-3.87V max.
1001 = 3.47V min.-3.75V max.
1000 = 3.27V min.-3.55V max.
0111 = 2.98V min.-3.22V max.
0110 = 2.77V min.-3.01V max.
0101 = 2.67V min.-2.89V max.
0100 = 2.48V min.-2.68V max.
0011 = 2.37V min.-2.57V max.
0010 = 2.18V min.-2.36V max.
0001 = 1.98V min.-2.14V max.
0000 = Reserved
Legend:
R = Readable bit
-n = Value at POR
Note:
U-0
—
voltage range
specified voltage range and the LVD interrupt should not be enabled
LVDL3:LVDL0 modes, which result in a trip point below the valid operating voltage
of the device, are not tested.
U-0
—
IRVST
R-0
W = Writable bit
‘1’ = Bit is set
LVDEN
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
LVDL3
R/W-0
LVDL2
R/W-1
PIC18FXX8
x = Bit is unknown
LVDL1
R/W-0
DS41159E-page 261
LVDL0
R/W-1
bit 0