参数资料
型号: PIC18F2458T-I/SO
厂商: Microchip Technology
文件页数: 24/46页
文件大小: 0K
描述: IC PIC MCU FLASH 12KX16 28SOIC
产品培训模块: Asynchronous Stimulus
标准包装: 1,600
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 48MHz
连通性: I²C,SPI,UART/USART,USB
外围设备: 欠压检测/复位,HLVD,POR,PWM,WDT
输入/输出数: 24
程序存储器容量: 24KB(12K x 16)
程序存储器类型: 闪存
EEPROM 大小: 256 x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 4.2 V ~ 5.5 V
数据转换器: A/D 10x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
配用: DM163025-ND - PIC DEM FULL SPEED USB DEMO BRD
PIC18F2458/2553/4458/4553
DS39887C-page 30
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
CCP2M3:CCP2M0 bits (CCP2CON<3:0>) be pro-
grammed 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 (firmware must move 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 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 2-2:
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
(4)
PIR1
SPPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
(4)
PIE1
SPPIE(1)
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
(4)
IPR1
SPPIP(1)
ADIP
RCIP
TXIP
SSPIP
CCP1IP
TMR2IP
TMR1IP
(4)
PIR2
OSCFIF
CMIF
USBIF
EEIF
BCLIF
HLVDIF
TMR3IF
CCP2IF
(4)
PIE2
OSCFIE
CMIE
USBIE
EEIE
BCLIE
HLVDIE
TMR3IE
CCP2IE
(4)
IPR2
OSCFIP
CMIP
USBIP
EEIP
BCLIP
HLVDIP
TMR3IP
CCP2IP
(4)
ADRESH
A/D Result Register High Byte
(4)
ADRESL
A/D Result Register Low Byte
(4)
ADCON0
CHS3
CHS2
CHS1
CHS0
GO/DONE
ADON
ADCON1
VCFG1
VCFG0
PCFG3
PCFG2
PCFG1
PCFG0
ADCON2
ADFM
ACQT2
ACQT1
ACQT0
ADCS2
ADCS1
ADCS0
PORTA
—RA6(2)
RA5
RA4
RA3
RA2
RA1
RA0
(4)
TRISA
TRISA6(2) PORTA Data Direction Control Register
(4)
PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
(4)
TRISB
PORTB Data Direction Control Register
(4)
LATB
PORTB Data Latch Register (Read and Write to Data Latch)
(4)
PORTE(1)
RDPU
—RE3(3)
RE2(1)
RE1(1)
RE0(1)
(4)
TRISE(1)
TRISE2
TRISE1
TRISE0
(4)
LATE(1)
PORTE Data Latch Register
(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 28-pin devices and are read as ‘0’.
2:
RA6 and its associated latch and data direction bits are enabled as I/O pins based on oscillator configuration;
otherwise, they are 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 the “PIC18F2455/2550/4455/4550 Data Sheet”.
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