Microchip Technology MA330031-2 Data Sheet
2011-2013 Microchip Technology Inc.
DS70000657H-page 331
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
REGISTER 23-5:
AD1CHS123: ADC1 INPUT CHANNEL 1, 2, 3 SELECT REGISTER
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
—
—
—
—
—
CH123NB1
CH123NB0
CH123SB
bit 15
bit 8
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
—
—
—
—
—
CH123NA1
CH123NA0
CH123SA
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-11
Unimplemented:
Read as ‘0’
bit 10-9
CH123NB<1:0>:
Channel 1, 2, 3 Negative Input Select for Sample MUXB bits
In 12-bit mode (AD21B = 1), CH123NB is Unimplemented and is Read as ‘0’:
bit 8
CH123SB:
Channel 1, 2, 3 Positive Input Select for Sample MUXB bit
In 12-bit mode (AD21B = 1), CH123SB is Unimplemented and is Read as ‘0’:
bit 7-3
Unimplemented:
Read as ‘0’
bit 2-1
CH123NA<1:0>:
Channel 1, 2, 3 Negative Input Select for Sample MUXA bits
In 12-bit mode (AD21B = 1), CH123NA is Unimplemented and is Read as ‘0’:
Note 1:
AN0 through AN7 are repurposed when comparator and op amp functionality is enabled. See
to determine how enabling a particular op amp or comparator affects selection choices for Channels 1, 2
and 3.
and 3.
2:
The OAx input is used if the corresponding op amp is selected (OPMODE (CMxCON<10>) = 1);
otherwise, the ANx input is used.
otherwise, the ANx input is used.
Value
ADC Channel
CH1
CH2
CH3
11
AN9
AN10
AN11
10
(
OA3/AN6
AN7
AN8
0x
V
REFL
V
REFL
V
REFL
Value
ADC Channel
CH1
CH2
CH3
1
(
)
OA1/AN3
OA2/AN0
OA3/AN6
0
(
OA2/AN0
AN1
AN2
Value
ADC Channel
CH1
CH2
CH3
11
AN9
AN10
AN11
10
(
OA3/AN6
AN7
AN8
0x
V
REFL
V
REFL
V
REFL