Техническая Спецификация для Microchip Technology Microstick for the 3V PIC24F K-series DM240013-1 DM240013-1
Модели
DM240013-1
PIC24F16KL402 FAMILY
DS31037B-page 160
2011 Microchip Technology Inc.
REGISTER 19-2:
AD1CON2: A/D CONTROL REGISTER 2
R/W-0
R/W-0
R/W-0
R/W-0
U-0
R/W-0
U-0
U-0
VCFG2
VCFG1
VCFG0
OFFCAL
—
CSCNA
—
—
bit 15
bit 8
R-x
U-0
R/W-0
R/W-0
R/W-0
R/W-0
r-0
R/W-0
—
—
SMPI3
SMPI2
SMPI1
SMPI0
—
ALTS
bit 7
bit 0
Legend:
r = Reserved 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 15-13
VCFG<2:0>:
Voltage Reference Configuration bits
bit 12
OFFCAL:
Offset Calibration bit
)
1
= Conversions to get the offset calibration value
0
= Conversions to get the actual input value
bit 11
Unimplemented:
Read as ‘0’
bit 10
CSCNA:
Scan Input Selections for MUX A Input Multiplexer bit
1
= Scan inputs
0
= Do not scan inputs
bit 9-8
Unimplemented:
Read as ‘0’
bit 7
Reserved:
Ignore this value
bit 6
Unimplemented:
Read as ‘0’
bit 5-2
SMPI<3:0>:
Sample/Convert Sequences Per Interrupt Selection bits
1111
.
.
.
= Reserved, do not use (may cause conversion data loss)
.
0010
0001
= Interrupts at the completion of conversion for each 2
nd
sample/convert sequence
0000
= Interrupts at the completion of conversion for each sample/convert sequence
bit 1
Reserved:
Always maintain as ‘0’
bit 0
ALTS:
Alternate Input Sample Mode Select bit
1
= Uses MUX A input multiplexer settings for the first sample, then alternates between MUX B and
MUX A input multiplexer settings for all subsequent samples
0
= Always uses MUX A input multiplexer settings
Note 1:
When the OFFCAL bit is set, inputs are disconnected and tied to AV
SS
. This sets the inputs of the A/D to
zero. Then, the user can perform a conversion. Use of the Calibration mode is not affected by AD1PCFG
contents nor channel input selection. Any analog input switches are disconnected from the A/D Converter
in this mode. The conversion result is stored by the user software and used to compensate subsequent
conversions. This can be done by adding the two’s complement of the result obtained with the OFFCAL bit
set to all normal A/D conversions.
contents nor channel input selection. Any analog input switches are disconnected from the A/D Converter
in this mode. The conversion result is stored by the user software and used to compensate subsequent
conversions. This can be done by adding the two’s complement of the result obtained with the OFFCAL bit
set to all normal A/D conversions.
VCFG<2:0>
V
R
+
V
R
-
000
AV
DD
AV
SS
001
External V
REF
+ pin
AV
SS
010
AV
DD
External V
REF
- pin
011
External V
REF
+ pin
External V
REF
- pin
1xx
AV
DD
AV
SS