參數(shù)資料
型號(hào)： PIC16CR7X
廠商： Microchip Technology Inc.
英文描述： 28/40-Pin, 8-Bit CMOS ROM Microcontrollers
中文描述： 28/40-Pin，8位微控制器的CMOS光盤
文件頁數(shù)： 87/172頁
文件大?。?/td> 1506K
代理商： PIC16CR7X
2007 Microchip Technology Inc.
DS21993C-page 85
PIC16CR7X
The following steps should be followed for doing an
A/D conversion:
1.
Configure the A/D module:
Configure analog pins, voltage reference and
digital I/O (ADCON1)
Select A/D conversion clock (ADCON0)
Turn on A/D module (ADCON0)
2.
Configure the A/D interrupt (if desired):
Clear ADIF bit
Set ADIE bit
Set PEIE bit
Set GIE bit
3.
Select an A/D input channel (ADCON0).
4.
Wait for at least an appropriate acquisition
period.
Start conversion:
Set GO/DONE bit (ADCON0)
Wait for the A/D conversion to complete, by
either:
Polling for the GO/DONE bit to be cleared
(interrupts disabled)
OR
Waiting for the A/D interrupt
Read A/D Result register (ADRES) and clear bit
ADIF if required.
For next conversion, go to step 3 or step 4, as
required.
5.
6.
7.
8.
FIGURE 11-1:
A/D BLOCK DIAGRAM
(Input Voltage)
V
IN
V
REF
(Reference
Voltage)
V
DD
PCFG2:PCFG0
CHS2:CHS0
000
or
010
or
100
or
11x
001
or
011
or
101
RE2/AN7
(1)
RE1/AN6
(1)
RE0/AN5
(1)
RA5/AN4
RA3/AN3/V
REF
RA2/AN2
RA1/AN1
RA0/AN0
111
110
101
100
011
010
001
000
A/D
Converter
Note
1:
Not available on
PIC16CR73/76
.
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