參數(shù)資料
型號: 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
文件頁數(shù): 65/126頁
文件大?。?/td> 4243K
代理商: MC68HC08GP8ACFB
Analog-to-Digital Converter (ADC)
I/O Signals
MC68HC08GP8A
Data Sheet
MOTOROLA
Analog-to-Digital Converter (ADC)
43
3.5.2 Stop Mode
The ADC module is inactive after the execution of a STOP instruction. Any pending
conversion is aborted. ADC conversions resume when the MCU exits stop mode
after an external interrupt. Allow one conversion cycle to stabilize the analog
circuitry.
3.6 I/O Signals
The ADC module has eight pins shared with port B, PTB7/AD7–PTB0/AD0.
3.6.1 ADC Analog Power Pin (VDDAD)/ADC Voltage Reference High Pin (VREFH)
The ADC analog portion uses VDDAD as its power pin. Connect the VDDAD pin to
the same voltage potential as VDD. External filtering may be necessary to ensure
clean VDDAD for good results.
NOTE:
For maximum noise immunity, route VDDAD carefully and place bypass capacitors
as close as possible to the package.
3.6.2 ADC Analog Ground Pin (VSSAD)/ADC Voltage Reference Low Pin (VREFL)
The ADC analog portion uses VSSAD as its ground pin. Connect the VSSAD pin to
the same voltage potential as VSS.
NOTE:
Route VSSAD cleanly to avoid any offset errors.
3.6.3 ADC Voltage In (VADIN)
VADIN is the input voltage signal from one of the eight ADC channels to the ADC
module.
3.7 I/O Registers
These I/O registers control and monitor ADC operation:
ADC status and control register (ADSCR)
ADC data register (ADR)
ADC clock register (ADCLK)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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