Microchip Technology MA330031-2 Hoja De Datos
2011-2013 Microchip Technology Inc.
DS70000657H-page 325
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
23.4
ADC Control Registers
REGISTER 23-1:
AD1CON1: ADC1 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
FORM1
FORM0
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, HC, HS R/C-0, HC, HS
SSRC2
SSRC1
SSRC0
SSRCG
SIMSAM
ASAM
SAMP
DONE
bit 7
bit 0
Legend:
HC = Hardware Clearable bit HS = Hardware Settable bit C = 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:
ADC1 Operating Mode bit
1
= ADC module is operating
0
= ADC is off
bit 14
Unimplemented:
Read as ‘0’
bit 13
ADSIDL:
ADC1 Stop in Idle Mode bit
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
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:
ADC1 10-Bit or 12-Bit Operation Mode bit
1
= 12-bit, 1-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
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
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:
See
for information on this selection.
2:
This setting is available in dsPIC33EPXXXMC20X/50X and PIC24EPXXXMC20X devices only.
3:
Do not clear the DONE bit in software if Auto-Sample is enabled (ASAM = 1).