PIC24HJ12GP201 Datasheet, PDF (158/234 Pages) Microchip Technology – High-Performance, 16-Bit Microcontrollers

PIC24HJ12GP201/202
REGISTER 17-2: AD1CON2: ADC1 CONTROL REGISTER 2 (where x = 1 or 2)
R/W-0
R/W-0
R/W-0
U-0
VCFG<2:0>
—
bit 15
U-0
R/W-0
R/W-0
R/W-0
—
CSCNA
CHPS<1:0>
bit 8
R-0
BUFS
bit 7
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
SMPI<3:0>
BUFM
ALTS
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 15-13
bit 12-11
bit 10
bit 9-8
bit 7
bit 6
bit 5-2
bit 1
bit 0
VCFG<2:0>: Converter Voltage Reference Configuration bits
ADREF+
000
AVDD
001 External VREF+
010
AVDD
011 External VREF+
1xx
AVDD
ADREF-
AVSS
AVSS
External VREF-
External VREF-
Avss
Unimplemented: Read as ‘0’
CSCNA: Scan Input Selections for CH0+ during Sample A bit
1 = Scan inputs
0 = Do not scan inputs
CHPS<1:0>: Select Channels Utilized bits
When AD12B = 1, CHPS<1:0> is: U-0, Unimplemented, Read as ‘0’
1x = Converts CH0, CH1, CH2 and CH3
01 = Converts CH0 and CH1
00 = Converts CH0
BUFS: Buffer Fill Status bit (valid only when BUFM = 1)
1 = ADC is currently filling second half of buffer, user application should access data in the first half
0 = ADC is currently filling first half of buffer, user application should access data in the second half
Unimplemented: Read as ‘0’
SMPI<3:0>: Sample/Convert Sequences Per Interrupt Selection bits
1111 = Interrupts at the completion of conversion for each 16th sample/convert sequence
1110 = Interrupts at the completion of conversion for each 15th sample/convert sequence
•
•
•
0001 = Interrupts at the completion of conversion for each 2nd sample/convert sequence
0000 = Interrupts at the completion of conversion for each sample/convert sequence
BUFM: Buffer Fill Mode Select bit
1 = Starts filling first half of buffer on first interrupt and the second half of buffer on next interrupt
0 = Always starts filling buffer from the beginning
ALTS: Alternate Input Sample Mode Select bit
1 = Uses channel input selects for Sample A on first sample and Sample B on next sample
0 = Always uses channel input selects for Sample A
DS70282B-page 156
Preliminary
© 2007 Microchip Technology Inc.