MC908AP32CFBE Datasheet, PDF (249/324 Pages) Freescale Semiconductor, Inc – The following revision history table summarizes changes contained in this document. For your convenience, the page number designators have been linked to the appropriate location.

Chapter 15
Analog-to-Digital Converter (ADC)
15.1 Introduction
This section describes the analog-to-digital converter (ADC). The ADC is a 8-channel 10-bit linear
successive approximation ADC.
15.2 Features
Features of the ADC module include:
• Eight channels with multiplexed input
• High impedance buffered input
• Linear successive approximation with monotonicity
• 10-bit resolution
• Single or continuous conversion
• Auto-scan conversion on four channels
• Conversion complete flag or conversion complete interrupt
• Selectable ADC clock
• Conversion result justification
– 8-bit truncated mode
– Right justified mode
– Left justified mode
– Left justified sign mode
Addr.
$0057
$0058
$0059
$005A
$005B
Register Name
ADC Status and Control ^Read:
Register Write:
(ADSCR) Reset:
ADC Clock Control ^Read:
Register Write:
(ADICLK) Reset:
Read:
ADC Data Register High 0
(ADRH0)
Write:
Reset:
Read:
ADC Data Register Low 0
(ADRL0)
Write:
Reset:
Read:
ADC Data Register Low 1
(ADRL1)
Write:
Reset:
Bit 7
COCO
0
ADIV2
0
ADx
R
0
ADx
R
0
AD9
R
0
6
AIEN
0
ADIV1
0
ADx
R
0
ADx
R
0
AD8
R
0
5
ADCO
0
ADIV0
0
ADx
R
0
ADx
R
0
AD7
R
0
4
ADCH4
1
ADICLK
0
ADx
R
0
ADx
R
0
AD6
R
0
3
ADCH3
1
MODE1
0
ADx
R
0
ADx
R
0
AD5
R
0
Figure 15-1. ADC I/O Register Summary
2
ADCH2
1
MODE0
1
ADx
R
0
ADx
R
0
AD4
R
0
1
ADCH1
1
0
0
ADx
R
0
ADx
R
0
AD3
R
0
Bit 0
ADCH0
1
0
R
0
ADx
R
0
ADx
R
0
AD2
R
0
MC68HC908AP Family Data Sheet, Rev. 4
Freescale Semiconductor
247