參數(shù)資料
型號: MC68HC05P18A
廠商: Motorola, Inc.
英文描述: Low Cost HCMOS Microcontroller(低成本、8位HCMOS微控制器)
中文描述: 低成本HCMOS微控制器(低成本,8位HCMOS微控制器)
文件頁數(shù): 91/130頁
文件大小: 1200K
代理商: MC68HC05P18A
MC68HC05P18A
Technical Data
MOTOROLA
Analog-to-Digital (A/D) Converter
91
L
G
R
Technical Data — MC68HC05P18A
Section 11. Analog-to-Digital (A/D) Converter
11.1 Contents
11.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
11.3
11.3.1
11.3.2
11.3.3
Analog Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Ratiometric Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Reference Supply Voltage (V
REFH
) . . . . . . . . . . . . . . . . . . .92
Accuracy and Precision . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
11.4
Conversion Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
11.5
11.5.1
11.5.2
11.5.3
Digital Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
Conversion Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
Internal versus External Oscillator . . . . . . . . . . . . . . . . . . . .93
Multi-Channel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .94
11.6
A/D Status and Control Register. . . . . . . . . . . . . . . . . . . . . . . .94
11.7
A/D Conversion Data Register . . . . . . . . . . . . . . . . . . . . . . . . .96
11.8
A/D Subsystem Operation during Wait Mode
and Halt Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
11.9
A/D Subsystem Operation during Stop Mode. . . . . . . . . . . . . .96
11.2 Introduction
The MC68HC05P18A includes a 4-channel, multiplexed input, 8-bit,
successive approximation analog-to-digital (A/D) converter. The A/D
subsystem shares its inputs with port C pins PC3–PC7.
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