Microchip Technology MA330016 Data Sheet

DS70290J-page 183

dsPIC33FJ32GP202/204 and dsPIC33FJ16GP304

REGISTER 18-4:

AD1CHS123: ADC1 INPUT CHANNEL 1, 2, 3 SELECT REGISTER

U-0

R/W-0

—

CH123NB<1:0> CH123SB

bit 15

bit 8

U-0

R/W-0

—

CH123NA<1:0> CH123SA

bit 7

bit 0

Legend:
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 B bits
dsPIC33FJ32GP202 devices only:
If AD12B = 1:
11 = Reserved
10 = Reserved
01 = Reserved
00 = Reserved

If AD12B = 0:
11 = CH1 negative input is AN9, CH2 negative input is

AN10, CH3 negative input is AN11

10 = Reserved
01 = CH1, CH2, CH3 negative input is V

REF

00 = CH1, CH2, CH3 negative input is V

REF

dsPIC33FJ32GP204 and dsPIC33FJ16GP304 devices only:
If AD12B = 1:
11 = Reserved
10 = Reserved
01 = Reserved
00 = Reserved

If AD12B = 0:
11 = CH1 negative input is AN9, CH2 negative input is

AN10, CH3 negative input is AN11

10 = CH1 negative input is AN6, CH2 negative input is AN7, CH3 negative input is AN8
01 = CH1, CH2, CH3 negative input is V

REF

00 = CH1, CH2, CH3 negative input is V

REF

bit 8

CH123SB: Channel 1, 2, 3 Positive Input Select for Sample B bit
If AD12B = 1:
1 = Reserved
0 = Reserved

If AD12B = 0:
1 = CH1 positive input is AN3, CH2 positive input is AN4, CH3 positive input is AN5
0 = CH1 positive input is AN0, CH2 positive input is AN1, CH3 positive input is AN2

bit 7-3

Unimplemented: Read as ‘0’