參數(shù)資料
型號(hào): MC68HC08GP8ACFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁(yè)數(shù): 63/126頁(yè)
文件大?。?/td> 4243K
代理商: MC68HC08GP8ACFB
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Analog-to-Digital Converter (ADC)
Functional Description
MC68HC08GP8A
Data Sheet
MOTOROLA
Analog-to-Digital Converter (ADC)
41
Figure 3-2. ADC Block Diagram
3.3.2 Voltage Conversion
When the input voltage to the ADC equals VREFH, the ADC converts the signal to
$FF (full scale). If the input voltage equals VREFL, the ADC converts it to $00. Input
voltages between VREFH and VREFL are a straight-line linear conversion.
NOTE:
Inside the ADC module, the reference voltages VREFH is connected to the ADC
analog power, VDDAD; and VREFL is connected to the ADC analog ground, VSSAD.
Therefore, the ADC input voltage should not exceed these analog supply voltages.
Connect the VDDAD pin to the same voltage potential as the VDD pin, and connect
the VSSAD pin to the same voltage potential as the VSS pin.
The VDDAD pin should be routed carefully for maximum noise immunity.
INTERNAL DATA BUS
READ DDRBx
WRITE DDRBx
RESET
WRITE PTBx
READ PTBx
PTBx
DDRBx
PTBx
INTERRUPT
LOGIC
CHANNEL
SELECT
ADC
CLOCK
GENERATOR
CONVERSION
COMPLETE
ADC
(VADIN)
ADC CLOCK
CGMXCLK
BUS CLOCK
ADCH4–ADCH0
ADC DATA REGISTER
AIEN
COCO
DISABLE
ADC CHANNEL x
ADIV2–ADIV0
ADICLK
VOLTAGE IN
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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