PIC32MX440F256H-80I Datasheet, PDF (498/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
REGISTER 22-2: AD1CON2: ADC CONTROL REGISTER 2
r-x
r-x
r-x
r-x
r-x
r-x
—
—
—
—
—
—
bit 31
r-x
r-x
—
—
bit 24
r-x
r-x
r-x
r-x
r-x
r-x
r-x
r-x
—
—
—
—
—
—
—
—
bit 23
bit 16
R/W-0
R/W-0
R/W-0
R/W-0
r-x
R/W-0
r-x
VCFG<2:0>
OFFCAL
—
CSCNA
—
bit 15
r-x
—
bit 8
R-0
BUFS
bit 7
r-x
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
U = Unimplemented bit
W = Writable bit
P = Programmable bit
-n = Bit Value at POR: (‘0’, ‘1’, x = Unknown)
r = Reserved bit
bit 31-16
bit 15-13
bit 12
bit 11
bit 10
bit 9-8
bit 7
bit 6
Reserved: Write ‘0’; ignore read
VCFG<2:0>: Voltage Reference Configuration bits
ADC VR+
ADC VR-
000
AVDD
AVSS
001
External VREF+ pin
AVSS
010
AVDD
External VREF- pin
011
External VREF+ pin
External VREF- pin
1xx
AVDD
AVSS
OFFCAL: Input Offset Calibration Mode Select bit
1 = Enable Offset Calibration mode
VINH and VINL of the SHA are connected to VR-
0 = Disable Offset Calibration mode
The inputs to the SHA are controlled by AD1CHS or AD1CSSL
Reserved: Write ‘0’; ignore read
CSCNA: Scan Input Selections for CH0+ SHA Input for MUX A Input Multiplexer Setting bit
1 = Scan inputs
0 = Do not scan inputs
Reserved: Write ‘0’; ignore read
BUFS: Buffer Fill Status bit
Only valid when BUFM = 1 (ADRES split into 2 x 8-word buffers).
1 = ADC is currently filling buffer 0x8-0xF, user should access data in 0x0-0x7
0 = ADC is currently filling buffer 0x0-0x7, user should access data in 0x8-0xF
Reserved: Write ‘0’; ignore read
DS61143E-page 496
Preliminary
© 2008 Microchip Technology Inc.