Microchip Technology IC PIC MCU PIC16F1937-I/PT TQFP-44 MCP PIC16F1937-I/PT Data Sheet
Product codes
PIC16F1937-I/PT
PIC16(L)F1934/6/7
DS41364E-page 164
2008-2011 Microchip Technology Inc.
REGISTER 15-2:
ADCON1: A/D CONTROL REGISTER 1
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
U-0
R/W-0/0
R/W-0/0
R/W-0/0
ADFM
ADCS<2:0>
—
ADNREF
ADPREF<1:0>
bit 7
bit 0
Legend:
R = Readable bit
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:
A/D 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>:
A/D Conversion Clock Select bits
000
= F
OSC
/2
001
= F
OSC
/8
010
= F
OSC
/32
011
= F
RC
(clock supplied from a dedicated RC oscillator)
100
= F
OSC
/4
101
= F
OSC
/16
110
= F
OSC
/64
111
= F
RC
(clock supplied from a dedicated RC oscillator)
bit 3
Unimplemented:
Read as ‘0’
bit 2
ADNREF:
A/D Negative Voltage Reference Configuration bit
0
= V
REF
- is connected to V
SS
1
= V
REF
- is connected to external V
REF
- pin
(1)
bit 1-0
ADPREF<1:0>:
A/D Positive Voltage Reference Configuration bits
00
= V
REF
+ is connected to V
DD
01
= Reserved
10
= V
REF
+ is connected to external V
REF
+ pin
(1)
11
= V
REF
+ is connected to internal Fixed Voltage Reference (FVR) module
(1)
Note 1:
When selecting the FVR or the V
REF
+ pin as the source of the positive reference, be aware that a
minimum voltage specification exists. See the applicable Electrical Specifications Chapter for details.