PIC18F6621-I/PT Microchip Technology Inc., PIC18F6621-I/PT Datasheet - Page 257

• Manufacturer Part Number: PIC18F6621-I/PT
• Description: 64 PIN, 64 KB FLASH, 3840 RAM, 52 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F6621-I/PT

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 54
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 64-pin TQFP
• Programmable Memory: 64K Bytes
• Ram Size: 3.8K Bytes
• Speed: 40 MHz
• Timers: 2-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

23.1
The
(Register 23-1)
Low-Voltage Detect circuitry.
REGISTER 23-1:
 2005 Microchip Technology Inc.
Low-Voltage
Control Register
bit 7-6
bit 5
bit 4
bit 3-0
controls
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-4.83V
1101 = 4.16V-4.5V
1100 = 3.96V-4.3V
1011 = 3.76V-3.92V
1010 = 3.57V-3.87V
1001 = 3.47V-3.75V
1000 = 3.27V-3.55V
0111 = 2.98V-3.22V
0110 = 2.77V-3.01V
0101 = 2.67V-2.89V
0100 = 2.48V-2.68V
0011 = 2.37V-2.57V
0010 = 2.18V-2.36V
0001 = 1.98V-2.14V
0000 = Reserved
Legend:
R = Readable bit
-n = Value at POR
Detect
Note:
U-0
—
voltage range
specified voltage range and the LVD interrupt should not be enabled
the
operation
LVDL3:LVDL0 modes, which result in a trip point below the valid operating voltage
of the device, are not tested.
Control
U-0
—
PIC18F6525/6621/8525/8621
of
register
IRVST
R-0
the
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
x = Bit is unknown
LVDL1
R/W-0
DS39612B-page 255
LVDL0
R/W-1
bit 0