參數(shù)資料
型號(hào): 68HC05BD2
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁(yè)數(shù): 71/85頁(yè)
文件大小: 302K
代理商: 68HC05BD2
SECTION 12: A/D CONVERTER
MOTOROLA
Page 61
MC68HC05BD7 Rev. 2.0
GENERAL RELEASE SPECIFICATION
PRELMNARY
Figure 12-1: Structure of A/D Converter
SECTION 12
A/D CONVERTER
12.1
Introduction
The Analog-to-Digital Converter (ADC) system consists of four analog input channels and
a single 6-bit D/A Converter and Comparator, with continuous conversion. A result flag
indicates if the comparator output is above or below the analog Input. ADC is disabled by
setting AD5 to AD0 bits of ADC Control/Status Register to all 1’s. This disable function is
mainly for low power application.
12.2
Input
The ADC has four multiplexed input channels. Only one of the four channels will be
selected by CHSL1 and CHSL0 bits as analog input.
12.2.1
ADC0-ADC3
The ADC0 to ADC3 inputs are multiplexed with the PC2 to PC5 port pins. They are selected
as ADC input then the corresponding AD0-AD3 bit in the CR2 register is one. The user can
use the CHSL1 and CHSL0 bits to select one of the four channels to do the A/D Conversion
and get the approximate digital value of each input channel.
+
-
Vdd
2R
2R
2R
2R
2R
RESULT
AD5
AD3
AD2
AD0
ADC0 or ADC1 or ADC2 or ADC3
2R
AD4
2R
AD1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
68HC05BD7 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:SPECIFICATION REV 2.0 (General Release)
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