PIC18F-LF1XK50 Datasheet, PDF (247/420 Pages) Microchip Technology – 20-Pin USB Flash Microcontrollers

PIC18F/LF1XK50
FIGURE 21-2:
VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
PIC18F1XK50/
PIC18LF1XK50
CVREF
Module
R⁽¹⁾
Voltage
Reference
Output
Impedance
CVREF
+
–
Buffered CVREF Output
Note 1: R is dependent upon the voltage reference Configuration bits, CVR<3:0> and CVRR.
REGISTER 21-1: REFCON0: REFERENCE CONTROL REGISTER 0
R/W-0
R-0
R/W-0
R/W-1
U-0
U-0
FVR1EN
FVR1ST
FVR1S1
FVR1S0
—
—
bit 7
U-0
U-0
—
—
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5-4
bit 3-0
FVR1EN: Fixed Voltage Reference 1 Enable bit
0 = FVR is disabled
1 = FVR is enabled
FVR1ST: Fixed Voltage Reference 1 Stable bit
0 = FVR is not stable
1 = FVR is stable
FVR1S<1:0>: Fixed Voltage Reference 1 Voltage Select bits
00 = Reserved, do not use
01 = 1.024V (x1)
10 = 2.048V (x2)
11 = 4.096V (x4)
Unimplemented: Read as ‘0’
 2010 Microchip Technology Inc.
Preliminary
DS41350E-page 247