PIC18F2331_07 Datasheet, PDF (250/400 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
REGISTER 20-3: ADCON2: A/D CONTROL REGISTER 2
R/W-0
ADFM
bit 7
R/W-0
ACQT3
R/W-0
ACQT2
R/W-0
ACQT1
R/W-0
ACQT0
R/W-0
ADCS2
R/W-0
ADCS1
R/W-0
ADCS0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6-3
bit 2-0
ADFM: A/D Result Format Select bit
1 = Right justified
0 = Left justified
ACQT<3:0>: A/D Acquisition Time Select bits
0000 = No delay (Conversion starts immediately when GO/DONE is set)⁽¹⁾
0001 = 2 TAD
0010 = 4 TAD
0011 = 6 TAD
0100 = 8 TAD
0101 = 10 TAD
0110 = 12 TAD
0111 = 16 TAD
1000 = 20 TAD
1001 = 24 TAD
1010 = 28 TAD
1011 = 32 TAD
1100 = 36 TAD
1101 = 40 TAD
1110 = 48 TAD
1111 = 64 TAD
ADCS<2:0>: A/D Conversion Clock Select bits
000 = FOSC/2
001 = FOSC/8
010 = FOSC/32
011 = FRC/4⁽²⁾
100 = FOSC/4
101 = FOSC/16
110 = FOSC/64
111 = FRC (Internal A/D RC Oscillator)
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before sampling/conversion starts.
2: Due to an increased frequency of the internal A/D RC oscillator, FRC/4 provides clock frequencies
compatible with previous A/D modules.
DS39616C-page 248
Preliminary
© 2007 Microchip Technology Inc.