PIC12F1822 MICROCHIP [Microchip Technology], PIC12F1822 Datasheet - Page 133

• Manufacturer Part Number: PIC12F1822
• Description: 8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

15.0
The
conversion of an analog input signal to a 10-bit binary
representation of that signal. This device uses analog
inputs, which are multiplexed into a single sample and
hold circuit. The output of the sample and hold is
connected to the input of the converter. The converter
generates a 10-bit binary result via successive
approximation and stores the conversion result into the
ADC result registers (ADRESH:ADRESL register pair).
Figure 15-1 shows the block diagram of the ADC.
The ADC voltage reference is software selectable to be
either internally generated or externally supplied.
FIGURE 15-1:
 2010 Microchip Technology Inc.
Analog-to-Digital
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
Note 1: When ADON = 0, all multiplexer inputs are disconnected.
FVR Buffer1
2: Not available on PIC12F/LF1822.
AN4
AN5
AN6
AN7
DAC
AN0
AN1
AN2
AN3
(2)
(2)
(2)
(2)
ADC BLOCK DIAGRAM
Converter
CHS<4:0>
V
DD
V
(ADC)
REF
00000
00001
00010
00011
00100
00101
00110
00111
11110
11111
+
ADPREF = 11
PIC12F/LF1822/16F/LF1823
ADPREF = 00
ADPREF = 10
allows
Preliminary
GO/DONE
ADON
The ADC can generate an interrupt upon completion of
a conversion. This interrupt can be used to wake-up the
device from Sleep.
(1)
V
SS
ADC
ADFM
ADRESH ADRESL
0 = Left Justify
1 = Right Justify
DS41413A-page 133
16
10