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(yè)數(shù): 42/116頁(yè)
文件大?。?/td> 671K
代理商: 12CE673
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PIC12CE67X
DS40181B-page 42
Preliminary
1998 Microchip Technology Inc.
8.4
Example 8-2 show how to perform an A/D conversion.
The GP pins are configured as analog inputs. The ana-
log reference (V
REF
) is the device V
DD
. The A/D inter-
rupt is enabled, and the A/D conversion clock is F
RC
.
The conversion is performed on the GP0 channel.
A/D Conversions
Note:
The GO/DONE bit should
NOT
be set in
the same instruction that turns on the A/D.
Clearing the GO/DONE bit during a conversion will
abort the current conversion. The ADRES register will
NOT be updated with the partially completed A/D con-
version sample. That is, the ADRES register will con-
tinue to contain the value of the last completed
conversion (or the last value written to the ADRES reg-
ister). After the A/D conversion is aborted, a 2T
AD
wait
is required before the next acquisition is started. After
this 2T
AD
wait, an acquisition is automatically started
on the selected channel.
EXAMPLE 8-2:
DOING AN A/D CONVERSION
BSF STATUS, RP0 ; Select Page 1
CLRF ADCON1 ; Configure A/D inputs
BSF PIE1, ADIE ; Enable A/D interrupts
BCF STATUS, RP0 ; Select Page 0
MOVLW 0xC1 ; RC Clock, A/D is on, Channel 0 is selected
MOVWF ADCON0 ;
BCF PIR1, ADIF ; Clear A/D interrupt flag bit
BSF INTCON, PEIE ; Enable peripheral interrupts
BSF INTCON, GIE ; Enable all interrupts
;
; Ensure that the required sampling time for the selected input channel has elapsed.
; Then the conversion may be started.
;
BSF ADCON0, GO ; Start A/D Conversion
: ; The ADIF bit will be set and the GO/DONE bit
: ; is cleared upon completion of the A/D Conversion.
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