Datasheet

PIC16(L)F1516/7/8/9
DS41452C-page 142  2010-2012 Microchip Technology Inc.
REGISTER 16-2: ADCON1: ADC CONTROL REGISTER 1
R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 U-0 U-0 R/W-0/0 R/W-0/0
ADFM ADCS<2:0>
— — ADPREF<1:0>
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
u = Bit is unchanged x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set ‘0’ = Bit is cleared
bit 7
ADFM: ADC Result Format Select bit
1 = Right justified. Six Most Significant bits of ADRESH are set to ‘0’ when the conversion result is
loaded.
0 = Left justified. Six Least Significant bits of ADRESL are set to ‘0’ when the conversion result is
loaded.
bit 6-4
ADCS<2:0>: ADC Conversion Clock Select bits
000 =F
OSC/2
001 =F
OSC/8
010 =F
OSC/32
011 =F
RC (clock supplied from a dedicated FRC oscillator)
100 =F
OSC/4
101 =F
OSC/16
110 =F
OSC/64
111 =F
RC (clock supplied from a dedicated FRC oscillator)
bit 3-2
Unimplemented: Read as ‘0’
bit 1-0
ADPREF<1:0>: ADC Positive Voltage Reference Configuration bits
00 =V
REF is connected to VDD
01 = Reserved
10 =V
REF is connected to external VREF+ pin
(1)
11 =VREF is connected to internal Fixed Voltage Reference (FVR) module
(1)
Note 1: When selecting the FVR or the VREF+ pin as the source of the positive reference, be aware that a
minimum voltage specification exists. See
Section 25.0 “Electrical Specifications” for details.