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參數(shù)資料
型號: PIC18F4423-I/PT
廠商: Microchip Technology
文件頁數(shù): 28/54頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 8KX16 44TQFP
產(chǎn)品培訓模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝: 160
系列: PIC® 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復位,HLVD,POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲器容量: 16KB(8K x 16)
程序存儲器類型: 閃存
EEPROM 大小: 256 x 8
RAM 容量: 768 x 8
電壓 - 電源 (Vcc/Vdd): 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 13x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-TQFP
包裝: 托盤
產(chǎn)品目錄頁面: 643 (CN2011-ZH PDF)
配用: 444-1001-ND - DEMO BOARD FOR PICMICRO MCU
AC164020-ND - MODULE SKT PROMATEII 44TQFP
PIC18F2423/2523/4423/4523
DS39755C-page 34
2009 Microchip Technology Inc.
2.8
Use of the CCP2 Trigger
An A/D conversion can be started by the Special Event
Trigger of the CCP2 module. This requires that the
CCP2M<3:0> bits (CCP2CON<3:0>) be programmed
as ‘1011’ and that the A/D module is enabled (ADON
bit is set). When the trigger occurs, the GO/DONE bit
will be set, starting the A/D acquisition and conversion,
and the Timer1 (or Timer3) counter will be reset to zero.
Timer1 (or Timer3) is reset to automatically repeat the
A/D acquisition period with minimal software overhead
(moving ADRESH:ADRESL to the desired location).
The appropriate analog input channel must be selected
and the minimum acquisition period is either timed by
the user or an appropriate TACQ time is selected before
the Special Event Trigger sets the GO/DONE bit (starts
a conversion).
If the A/D module is not enabled (ADON is cleared), the
Special Event Trigger will be ignored by the A/D
module, but will still reset the Timer1 (or Timer3)
counter.
TABLE 2-3:
REGISTERS ASSOCIATED WITH A/D OPERATION
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset
Values on
page
INTCON
GIE/GIEH PEIE/GIEL TMR0IE
INT0IE
RBIE
TMR0IF
INT0IF
RBIF
(Note 4)
PIR1
PSPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
(Note 4)
PIE1
PSPIE(1)
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
(Note 4)
IPR1
PSPIP(1)
ADIP
RCIP
TXIP
SSPIP
CCP1IP
TMR2IP
TMR1IP
(Note 4)
PIR2
OSCFIF
CMIF
EEIF
BCLIF
HLVDIF
TMR3IF
CCP2IF
(Note 4)
PIE2
OSCFIE
CMIE
EEIE
BCLIE
HLVDIE
TMR3IE
CCP2IE
(Note 4)
IPR2
OSCFIP
CMIP
EEIP
BCLIP
HLVDIP
TMR3IP
CCP2IP
(Note 4)
ADRESH
A/D Result Register High Byte
(Note 4)
ADRESL
A/D Result Register Low Byte
(Note 4)
ADCON0
CHS3
CHS2
CHS1
CHS0
GO/DONE
ADON
(Note 4)
ADCON1
VCFG1
VCFG0
PCFG3
PCFG2
PCFG1
PCFG0
(Note 4)
ADCON2
ADFM
ACQT2
ACQT1
ACQT0
ADCS2
ADCS1
ADCS0
(Note 4)
PORTA
RA7(2)
RA6(2)
RA5
RA4
RA3
RA2
RA1
RA0
(Note 4)
TRISA
TRISA7(2) TRISA6(2) PORTA Data Direction Control Register
(Note 4)
PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
(Note 4)
TRISB
PORTB Data Direction Control Register
(Note 4)
LATB
PORTB Data Latch Register (Read and Write to Data Latch)
(Note 4)
PORTE(1)
—RE3(3)
RE2
RE1
RE0
(Note 4)
TRISE(1)
IBF
OBF
IBOV
PSPMODE
TRISE2
TRISE1
TRISE0
(Note 4)
LATE(1)
PORTE Data Latch Register
(Note 4)
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used for A/D conversion.
Note 1: These registers and/or bits are not implemented on PIC18F2423/2523 devices and are read as ‘0’.
2: PORTA<7:6> and their direction bits are individually configured as port pins based on various primary
oscillator modes. When disabled, these bits read as ‘0’.
3: RE3 port bit is available only as an input pin when the MCLRE Configuration bit is ‘0’.
4: For these Reset values, see Section 4.0 “Reset” of the “PIC18F2420/2520/4420/4520 Data Sheet”
(DS39631).
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