Datasheet

PIC24FJ64GA104 FAMILY
DS39951C-page 224  2010 Microchip Technology Inc.
REGISTER 21-4: AD1CHS: A/D INPUT SELECT REGISTER
R/W-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CH0NB
— — CH0SB4
(1,2)
CH0SB3
(1,2)
CH0SB2
(1,2)
CH0SB1
(1,2)
CH0SB0
(1,2)
bit 15 bit 8
R/W
-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CH0NA
— — CH0SA4 CH0SA3 CH0SA2 CH0SA1 CH0SA0
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 CH0NB: Channel 0 Negative Input Select for MUX B Multiplexer Setting bit
1 = Channel 0 negative input is AN1
0 = Channel 0 negative input is V
R-
bit 14-13 Unimplemented: Read as ‘0’
bit 12-8 CH0SB<4:0>: Channel 0 Positive Input Select for MUX B Multiplexer Setting bits
(1,2)
11111 = Channel 0 positive input is reserved for CTMU use only
(3)
1xxxx = Unimplemented; do not use.
01111 = Channel 0 positive input is internal band gap reference (V
BG)
01110 = Channel 0 positive input is V
BG/2
01101 = Channel 0 positive input is voltage regulator output (V
DDCORE)
01100 = Channel 0 positive input is AN12
01011 = Channel 0 positive input is AN11
01010 = Channel 0 positive input is AN10
01001 = Channel 0 positive input is AN9
01000 = Channel 0 positive input is AN8
00111 = Channel 0 positive input is AN7
00110 = Channel 0 positive input is AN6
00101 = Channel 0 positive input is AN5
00100 = Channel 0 positive input is AN4
00011 = Channel 0 positive input is AN3
00010 = Channel 0 positive input is AN2
00001 = Channel 0 positive input is AN1
00000 = Channel 0 positive input is AN0
bit 7 CH0NA: Channel 0 Negative Input Select for MUX A Multiplexer Setting bit
1 = Channel 0 negative input is AN1
0 = Channel 0 negative input is V
R-
bit 6-5 Unimplemented: Read as ‘0’
bit 4-0 CH0SA<4:0>: Channel 0 Positive Input Select for MUX A Multiplexer Setting bits
Implemented combinations are identical to those for CH0SB<4:0> (above).
Note 1: Combinations not shown here are unimplemented; do not use.
2: Analog channels, AN6, AN7, AN8 and AN12, are unavailable on 28-pin devices; do not use.
3: Selecting this internal channel allows the CTMU module to utilize the A/D Converter sample and hold
capacitor (CAD) for the smallest time measurements.