MC68HC908JK3EMP MOTOROLA [Motorola, Inc], MC68HC908JK3EMP Datasheet - Page 144
MC68HC908JK3EMP
Manufacturer Part Number
MC68HC908JK3EMP
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908JK3EMP.pdf
(226 pages)
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Analog-to-Digital Converter (ADC)
11.3 Features
11.4 Functional Description
Technical Data
144
Addr.
$003C
$003D
$003E
ADC Input Clock Register
ADC Status and Control
Register Name
ADC Data Register
(ADICLK)
(ADSCR)
Register
(ADR)
Features of the ADC module include:
Twelve ADC channels are available for sampling external sources at
pins PTB0–PTB7 and PTD0–PTD3. An analog multiplexer allows the
single ADC converter to select one of the 12 ADC channels as ADC
voltage input (ADCVIN). ADCVIN is converted by the successive
approximation register-based counters. The ADC resolution is 8 bits.
When the conversion is completed, ADC puts the result in the ADC data
register and sets a flag or generates an interrupt.
block diagram of the ADC.
Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
Figure 11-1. ADC I/O Register Summary
•
•
•
•
•
•
12 channels with multiplexed input
Linear successive approximation with monotonicity
8-bit resolution
Single or continuous conversion
Conversion complete flag or conversion complete interrupt
Selectable ADC clock
COCO
ADIV2
Bit 7
AD7
Analog-to-Digital Converter (ADC)
0
0
ADIV1
AIEN
AD6
6
0
0
ADCO
ADIV0
AD5
5
0
0
Indeterminate after reset
ADCH4
AD4
4
1
0
0
MC68H(R)C908JL3E/JK3E/JK1E
ADCH3
AD3
3
1
0
0
ADCH2
AD2
Figure 11-2
2
1
0
0
ADCH1
AD1
1
1
0
0
MOTOROLA
shows a
—
Rev. 2.0
ADCH0
Bit 0
AD0
1
0
0
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