Datasheet

dsPIC33FJXXXGPX06A/X08A/X10A
DS70593D-page 244  2009-2012 Microchip Technology Inc.
REGISTER 21-3: ADxCON3: ADCx CONTROL REGISTER 3
R/W-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADRC — — SAMC<4:0>
(1)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADCS<7:0>
(2)
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 ADRC: ADC Conversion Clock Source bit
1 = ADC internal RC clock
0 = Clock derived from system clock
bit 14-13 Unimplemented: Read as ‘0’
bit 12-8 SAMC<4:0>: Auto Sample Time bits
(1)
11111 = 31 TAD
•
•
•
00001 = 1 T
AD
00000 = 0 TAD
bit 7-0 ADCS<7:0>: ADC Conversion Clock Select bits
(2)
11111111 = Reserved
•
•
•
01000000 = Reserved
00111111 = TCY · (ADCS<7:0> + 1) = 64 · TCY = TAD
•
•
•
00000010 = T
CY · (ADCS<7:0> + 1) = 3 · TCY = TAD
00000001 = T
CY · (ADCS<7:0> + 1) = 2 · TCY = TAD
00000000 = TCY · (ADCS<7:0> + 1) = 1 · TCY = TAD
Note 1: This bit only used if ADxCON1<7:5> (SSRC<2:0>) = 111.
2: This bit is not used if ADxCON3<15> (ADRC) = 1.