Datasheet

© 2007 Microchip Technology Inc. Preliminary DS70165E-page 283
dsPIC33F
REGISTER 22-3: 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>
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— —ADCS<5:0>
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
11111 = 31 T
AD
• • •
00001 = 1 T
AD
00000 = 0 TAD
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 ADCS<5:0>: ADC Conversion Clock Select bits
111111 = TCY · (ADCS<7:0> + 1) = 64 · TCY = TAD
• • •
000010 = T
CY · (ADCS<7:0> + 1) = 3 · TCY = TAD
000001 = T
CY · (ADCS<7:0> + 1) = 2 · TCY = TAD
000000 = TCY · (ADCS<7:0> + 1) = 1 · TCY = TAD