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MC68HC08AS32A Datasheet(PDF) 60 Page - Motorola, Inc

No. de Pieza. MC68HC08AS32A
Descripción  Microcontrollers
Descarga  296 Pages
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Fabricante  MOTOROLA [Motorola, Inc]
Página de inicio  http://www.freescale.com
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MC68HC08AS32A Datasheet(HTML) 60 Page - Motorola, Inc

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Analog-to-Digital Converter (ADC)
Data Sheet
MC68HC08AS32A — Rev. 1
60
Analog-to-Digital Converter (ADC)
MOTOROLA
3.7.2 ADC Data Register
One 8-bit data register is provided. This register is updated each time an ADC
conversion completes.
3.7.3 ADC Input Clock Register
This register selects the clock frequency for the ADC.
ADIV2:ADIV0 — ADC Clock Prescaler Bits
ADIV2, ADIV1, and ADIV0 form a 3-bit field which selects the divide ratio used
by the ADC to generate the internal ADC clock. Table 3-2 shows the available
clock configurations. The ADC clock should be set to approximately 1 MHz.
Address:
$0039
Bit 7
654321
Bit 0
Read:
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
Write:
Reset:
Unaffected by reset
= Unimplemented
Figure 3-4. ADC Data Register (ADR)
Address:
$003A
Bit 7
654321
Bit 0
Read:
ADIV2
ADIV1
ADIV0
ADICLK
0000
Write:
Reset:
00000000
= Unimplemented
Figure 3-5. ADC Input Clock Register (ADICLK)
Table 3-2. ADC Clock Divide Ratio
ADIV2
ADIV1
ADIV0
ADC Clock Rate
0
0
0
ADC input clock
÷ 1
0
0
1
ADC input clock
÷ 2
0
1
0
ADC input clock
÷ 4
0
1
1
ADC input clock
÷ 8
1
X
X
ADC input clock
÷ 16
X = Don’t care
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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