參數(shù)資料
型號(hào): PIC12CE674-10/P
廠商: Microchip Technology
文件頁數(shù): 76/129頁
文件大?。?/td> 0K
描述: IC MCU OTP 2KX14 A/D&EE 8DIP
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 60
系列: PIC® 12C
核心處理器: PIC
芯體尺寸: 8-位
速度: 10MHz
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 5
程序存儲(chǔ)器容量: 3.5KB(2K x 14)
程序存儲(chǔ)器類型: OTP
EEPROM 大?。?/td> 16 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x8b
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 8-DIP(0.300",7.62mm)
包裝: 管件
配用: ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC
PIC12C67X
DS30561B-page 50
1999 Microchip Technology Inc.
8.4
A/D Conversions
Example 8-2 shows how to perform an A/D conversion.
The GPIO pins are configured as analog inputs. The
analog reference (VREF) is the device VDD. The A/D
interrupt is enabled and the A/D conversion clock is
FRC. The conversion is performed on the GP0 channel.
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 2TAD wait
is required before the next acquisition is started. After
this 2TAD 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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