Microchip Technology MA330025-1 Data Sheet
2009-2012 Microchip Technology Inc.
DS70616G-page 417
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
23.4
ADC Control Registers
REGISTER 23-1:
ADxCON1: ADCx CONTROL REGISTER 1
R/W-0
U-0
R/W-0
R/W-0
U-0
R/W-0
R/W-0
R/W-0
ADON
—
ADSIDL
ADDMABM
—
AD12B
(
)
FORM<1:0>
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, HSC R/C-0, HSC
SSRC<2:0>
SSRCG
SIMSAM
ASAM
SAMP
DONE
bit 7
bit 0
Legend:
C = Clearable bit
HSC = Hardware Settable/Clearable bit
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
ADON: ADC Operating Mode bit
1 = ADC module is operating
0 = ADC is off
1 = ADC module is operating
0 = ADC is off
bit 14
Unimplemented: Read as ‘0’
bit 13
ADSIDL: ADC Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12
ADDMABM: DMA Buffer Build Mode bit
1 = DMA buffers are written in the order of conversion; the module provides an address to the DMA
1 = DMA buffers are written in the order of conversion; the module provides an address to the DMA
channel that is the same as the address used for the non-DMA stand-alone buffer
0 = DMA buffers are written in Scatter/Gather mode; the module provides a Scatter/Gather address
to the DMA channel, based on the index of the analog input and the size of the DMA buffer
bit 11
Unimplemented: Read as ‘0’
bit 10
AD12B: ADC 10-Bit or 12-Bit Operation Mode bit
1 = 12-bit, 1-channel ADC operation
0 = 10-bit, 4-channel ADC operation
0 = 10-bit, 4-channel ADC operation
bit 9-8
FORM<1:0>: Data Output Format bits
For 10-Bit Operation:
11 = Signed fractional (D
For 10-Bit Operation:
11 = Signed fractional (D
OUT
= sddd dddd dd00 0000, where s = .NOT.d<9>)
10 = Fractional (D
OUT
= dddd dddd dd00 0000)
01 = Signed integer (D
OUT
= ssss sssd dddd dddd, where s = .NOT.d<9>)
00 = Integer (D
OUT
= 0000 00dd dddd dddd)
For 12-Bit Operation:
11 = Signed fractional (D
11 = Signed fractional (D
OUT
= sddd dddd dddd 0000, where s = .NOT.d<11>)
10 = Fractional (D
OUT
= dddd dddd dddd 0000)
01 = Signed Integer (D
OUT
= ssss sddd dddd dddd, where s = .NOT.d<11>)
00 = Integer (D
OUT
= 0000 dddd dddd dddd)
Note 1: This bit is only available in the ADC1 module. In the ADC2 module, this bit is unimplemented and is read
as ‘0’.
2: This setting is available in dsPIC33EPXXX(MC/MU)806/810/814 devices only.
3: Do not clear the DONE bit in software if ADC Sample Auto-Start is enabled (ASAM = 1).
3: Do not clear the DONE bit in software if ADC Sample Auto-Start is enabled (ASAM = 1).