PIC18F2480 MICROCHIP [Microchip Technology], PIC18F2480 Datasheet - Page 252
PIC18F2480
Manufacturer Part Number
PIC18F2480
Description
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2480.pdf
(484 pages)
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PIC18F2480/2580/4480/4580
The analog reference voltage is software selectable to
either the device’s positive and negative supply voltage
(AV
RA3/AN3/V
The A/D converter has a unique feature of being able
to operate while the device is in Sleep mode. To oper-
ate in Sleep, the A/D conversion clock must be derived
from the A/D’s internal RC oscillator.
The output of the sample and hold is the input into the
converter, which generates the result via successive
approximation.
FIGURE 19-1:
DS39637A-page 250
DD
Note 1:
and AV
REF
2:
+ and RA2/AN2/V
Converter
SS
Channels AN5 through AN7 are not available on PIC18F2X80 devices.
I/O pins have diode protection to V
10-bit
), or the voltage level on the
A/D
Reference
Voltage
A/D BLOCK DIAGRAM
REF
-/CV
V
V
REF
REF
REF
+
-
pins.
(Input Voltage)
VCFG1:VCFG0
V
Preliminary
AIN
DD
and V
X
X
1
0
0
1
X
X
AV
SS
A device Reset forces all registers to their Reset state.
This forces the A/D module to be turned off and any
conversion in progress is aborted.
Each port pin associated with the A/D converter can be
configured as an analog input, or as a digital I/O. The
ADRESH and ADRESL registers contain the result of
the A/D conversion. When the A/D conversion is com-
plete, the result is loaded into the ADRESH/ADRESL
registers, the GO/DONE bit (ADCON0 register) is
cleared and A/D Interrupt Flag bit ADIF is set. The
block diagram of the A/D module is shown in
Figure 19-1.
.
DD
AV
SS
CHS3:CHS0
1010
1001
1000
0111
0110
0101
0100
0011
0010
0001
0000
2004 Microchip Technology Inc.
AN10
AN9
AN8
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
(1)
(1)
(1)
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