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MC68HC08AS32A Datasheet(PDF) 59 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) 59 Page - Motorola, Inc

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Analog-to-Digital Converter (ADC)
I/O Registers
MC68HC08AS32A — Rev. 1
Data Sheet
MOTOROLA
Analog-to-Digital Converter (ADC)
59
The ADC subsystem is turned off when the channel select bits are all set to one.
This feature allows for reduced power consumption for the MCU when the ADC
is not used. Reset sets all of these bits to a logic 1.
NOTE:
Recovery from the disabled state requires one conversion cycle to stabilize.
Table 3-1. Mux Channel Select
ADCH4
ADCH3
ADCH2
ADCH1
ADCH0
Input Select
00
000
PTB0/ATD0
00
001
PTB1/ATD1
00
010
PTB2/ATD2
00
011
PTB3/ATD3
00
100
PTB4/ATD4
00
101
PTB5/ATD5
00
110
PTB6/ATD6
00
111
PTB7/ATD7
01
000
PTD0/ATD8
01
001
PTD1/ATD9
01
010
PTD2/ATD10
01
011
PTD3/ATD11
01
100
PTD4/ATD12
01
101
PTD5/ATD13
01
110
PTD6/ATD14/TCLK
Range 01111 ($0F) to 11010 ($1A)
Unused(1)
1. If any unused channels are selected, the resulting ADC conversion will be unknown.
11
011
Reserved
11
100
Unused(1)
11
101
VREFH
(2)
2. The voltage levels supplied from internal reference nodes as specified in the table are used to
verify the operation of the ADC converter both in production test and for user applications.
11
110
VSSA/VREFL
(2)
11
111
ADC Power Off
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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