PIC18F23K22 Datasheet, PDF (338/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology

PIC18(L)F2X/4XK22
REGISTER 21-1: VREFCON0: FIXED VOLTAGE REFERENCE CONTROL REGISTER
R/W-0
R/W-0
R/W-0
R/W-1
U-0
U-0
U-0
FVREN
FVRST
FVRS<1:0>
—
—
—
bit 7
U-0
—
bit 0
Legend:
R = Readable bit
u = Bit is unchanged
‘1’ = Bit is set
W = Writable bit
x = Bit is unknown
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
-n/n = Value at POR and BOR/Value at all other Resets
bit 7
FVREN: Fixed Voltage Reference Enable bit
0 = Fixed Voltage Reference is disabled
1 = Fixed Voltage Reference is enabled
bit 6
FVRST: Fixed Voltage Reference Ready Flag bit
0 = Fixed Voltage Reference output is not ready or not enabled
1 = Fixed Voltage Reference output is ready for use
bit 5-4
FVRS<1:0>: Fixed Voltage Reference Selection bits
00 = Fixed Voltage Reference Peripheral output is off
01 = Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = Fixed Voltage Reference Peripheral output is 2x (2.048V)⁽¹⁾
11 = Fixed Voltage Reference Peripheral output is 4x (4.096V)⁽¹⁾
bit 3-2
Reserved: Read as ‘0’. Maintain these bits clear.
bit 1-0
Unimplemented: Read as ‘0’.
Note 1: Fixed Voltage Reference output cannot exceed VDD.
TABLE 21-1: SUMMARY OF REGISTERS ASSOCIATED WITH FIXED VOLTAGE REFERENCE
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
VREFCON0 FVREN FVRST
FVRS<1:0>
—
—
—
—
338
Legend: — = unimplemented locations, read as ‘0’. Shaded bits are not used by the FVR module.
DS41412B-page 338
Preliminary
 2010 Microchip Technology Inc.