參數(shù)資料
型號(hào)： 12CE673
廠商： Microchip Technology Inc.
英文描述： HookUp/Lead Wire; Conductor Size AWG:18; No. Strands x Strand Size:65 x 36; Jacket Color:Black; Conductor Material:Copper; Jacket Material:Rubber; Leaded Process Compatible:Yes; Number of Conductors:1; Outer Diameter:0.144" RoHS Compliant: Yes
中文描述： 8引腳，8位CMOS微控制器與A / D轉(zhuǎn)換器和EEPROM數(shù)據(jù)存儲(chǔ)器
文件頁數(shù)： 39/116頁
文件大?。?/td> 671K
代理商： 12CE673
1998 Microchip Technology Inc.
Preliminary
DS40181B-page 39
PIC12CE67X
The ADRES register contains the result of the A/D con-
version. When the A/D conversion is complete, the
result is loaded into the ADRES register, the GO/DONE
bit (ADCON0<2>) is cleared, and A/D interrupt flag bit
ADIF (PIE1<6>) is set. The block diagrams of the A/D
module are shown in Figure 8-3.
After the A/D module has been configured as desired,
the selected channel must be acquired before the con-
version is started. The analog input channels must
have their corresponding TRIS bits selected as an
input. To determine sample time, see Section 8.1. After
this acquisition time has elapsed the A/D conversion
can be started. 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 input channel (ADCON0)
Select A/D conversion clock (ADCON0)
Turn on A/D module (ADCON0)
2.
Configure A/D interrupt (if desired):
Clear ADIF bit
Set ADIE bit
Set GIE bit
Wait the required acquisition time.
Start conversion:
Set GO/DONE bit (ADCON0)
Wait for A/D conversion to complete, by either:
Polling for the GO/DONE bit to be cleared
OR
Waiting for the A/D interrupt
Read A/D Result register (ADRES), clear bit
ADIF if required.
For next conversion, go to step 1 or step 2 as
required. The A/D conversion time per bit is
defined as T
AD
. A minimum wait of 2T
AD
is
required before next acquisition starts.
3.
4.
5.
6.
7.
FIGURE 8-3:
A/D BLOCK DIAGRAM
(Input voltage)
V
IN
V
REF
(Reference
voltage)
V
DD
PCFG2:PCFG0
CHS1:CHS0
000 or
010 or
100 or
110 or
001 or
011 or
101
GP4/AN3
GP0/AN0
GP2/AN2
GP1/AN1/V
REF
11
10
01
00
A/D
Converter
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