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Chapter 13
Queued Analog-to-Digital Converter
Legacy Mode Operation
The queued analog-to-digital converter (QADC) module on the MPC533 deviceis a 10-bit,
unipolar, successive approximation converter. The module can be configured to operate in
one of two modes, legacy mode (MPC555 compatible) and enhanced mode. This chapter
describes how the module operates in legacy mode, which is the default mode of operation.
Refer to Chapter 14, "Queued Analog-to-Digital Converter Enhanced Mode Operation,"
for information regarding the QADC64E functionality in enhanced mode.
For this revision of the QADC, the name QADC64E implies the enhanced version of the
QADC module, not just enhanced mode of operation. For simplicity, the names QADC and
QADC64E may be used interchangeably throughout this document.
13.1 QADC64E Block Diagram
Figure 13-1 displays the major components of the QADC64E module on the MPC533.
MOTOROLA Chapter 13. Queued Analog-to-Digital Converter Legacy Mode Operation
13-1
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
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