參數(shù)資料
型號： MC68HC705P9CDW
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝： SOIC-28
文件頁數(shù)： 40/160頁
文件大?。?/td> 2208K
代理商： MC68HC705P9CDW
Analog-to-Digital Converter (ADC)
Technical Data
MC68HC705P9 — Rev. 4.0
134
Analog-to-Digital Converter (ADC)
MOTOROLA
11.7 I/O Registers
The following registers control and monitor operation of the ADC:
ADC status and control register (ADSCR)
ADC data register (ADDR)
11.7.1 ADC Status and Control Register
The ADC status and control register (ADSCR) contains a conversion
complete flag and four writable control bits. Writing to ADSCR clears the
conversion complete flag and starts a new conversion sequence.
CCF — Conversion Complete Flag
This read-only bit is automatically set when an analog-to-digital
conversion is complete, and a new result can be read from the ADC
data register. Clear the CCF bit by writing to the ADC status and
control register or by reading the ADC data register. Resets clear the
CCF bit.
1 = Conversion complete
0 = Conversion not complete
ADRC — ADC RC (Oscillator)
This read/write bit turns on the internal RC oscillator to drive the ADC.
If the internal clock frequency (f
OP) is less than 1 MHz, ADRC must be
set. When the RC oscillator is turned on, it requires a time, t
ADRC, to
stabilize, and results can be inaccurate during this time. Resets clear
the ADRC bit.
1 = Internal RC oscillator drives ADC
0 = Internal clock drives ADC
$001E
Bit 7
6
54321
Bit 0
Read:
CCF
ADRC
ADON
00
CH2
CH1
CH0
Write:
Reset:
00
000000
= Unimplemented
Figure 11-3. ADC Status and Control Register (ADSCR)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)PDF資料
PDF描述
MC68HC705P9DW 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC705P9MS 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, CDIP28
MC68HC705P9CDW 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC705P9VS 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, CDIP28
MC68HC705P9S 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, CDIP28
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