参数资料
型号: DV164101
厂商: Microchip Technology
文件页数: 62/76页
文件大小: 0K
描述: KIT DEV PICKIT1 FLASH 8/14PIN
产品培训模块: Asynchronous Stimulus
标准包装: 1
系列: PICkit™ 1
类型: MCU
适用于相关产品: Microchip 8-14 引脚闪存微控制器
所含物品: PIC 套件 1 电路板、光盘、USB 接口缆线和手册
产品目录页面: 659 (CN2011-ZH PDF)
配用: AC164122-ND - BOARD DAUGHT PICTAIL SD/MMC CARD
AC164120-ND - BOARD SIGNAL ANALYSIS PICKIT
其它名称: DV164101R
DV164101R-ND
PICkit ? 1 Flash Starter Kit User’s Guide
C.6.2
Analog-to-Digital Converter Lesson
This lesson uses the PIC12F675 and demonstrates an interrupt based analog-to-
digital conversion. TMR0 is set up with a prescaler of 4, thus creating an interrupt
roughly every 1 ms. With every TMR0 interrupt, either the LED display routine is
serviced (see Lesson 3 ) or the A/D routine is serviced depending on the flag that tog-
gles with every interrupt. Noise is generated on V DD when the LEDs are updated.
Therefore, to reduce noise in the A/D process, either a new A/D conversion is done or
the display is updated, but not simultaneously. The A/D interrupt source is not used
because the service interval (2 ms) is much longer than the conversion period of 22 μ s.
The A/D module requires at least 4 μ s for the sample capacitor to charge between
acquisitions, but the program allows for about 2 ms. The result of the A/D is 10 bits,
even though only the eight most significant bits are displayed on the LEDs. The result
is left justified (ADFM = 0) and the most significant byte is written to the LEDREGISTER
to be displayed. The ANSEL register specifies which of the general purpose I/O pins
are to be configured as analog inputs to the A/D module. In this case, the potentiome-
ter's output serves as the input to AN0.
Figure C-12 shows the source code files for the assembly and C projects respectively.
DS40051D-page 58
FIGURE C-12:
ASSEMBLY AND C SOURCE CODE FILES
? 2004 Microchip Technology Inc.
相关PDF资料
PDF描述
DV164120 KIT STARTER PICKIT 2
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DV164122 ANALYZER SRL PICKIT W/DEMO BOARD
DV164131 KIT STARTER PICKIT 3
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相关代理商/技术参数
参数描述
DV164101 制造商:Microchip Technology Inc 功能描述:TOOLS: FLASH MICROCONTROLLER (
DV164102 功能描述:开发板和工具包 - 无线 rfPICkit RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V
DV164120 功能描述:电路内置调试器 PICkit 2 8/14/20P Flash RoHS:否 制造商:Microchip Technology 产品:In-Circuit Debugger Kits 工具用于评估:PIC MCUs, dsPIC DSCs 用于:07-00024, AC164113 核心:dsPIC, PIC 接口类型:USB 工作电源电压:3 V to 5 V
DV164121 功能描述:电路内置调试器 PICkit 2 Debug Express RoHS:否 制造商:Microchip Technology 产品:In-Circuit Debugger Kits 工具用于评估:PIC MCUs, dsPIC DSCs 用于:07-00024, AC164113 核心:dsPIC, PIC 接口类型:USB 工作电源电压:3 V to 5 V
DV164121 制造商:Microchip Technology Inc 功能描述:ICPICKIT2 PROGRAMMER/DEBUGGER ((NW))