© Diebold Election Systems, Inc. 2002 AccuVote-OS Hardware Guide
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Table of Contents
1.
Introduction.............................................................................................................................. 1
1.1.
Who this Guide is for ................................................................................................. 1
1.2.
Overview ................................................................................................................... 1
1.3.
Other documents....................................................................................................... 1
2.
AccuVote-OS Hardware .......................................................................................................... 3
2.1.
Product environment ................................................................................................. 3
2.2.
Looking at the AccuVote-OS..................................................................................... 3
2.3.
Inside the AccuVote-OS............................................................................................ 5
2.4.
Ballot Reader............................................................................................................. 5
2.5.
CPU Board ................................................................................................................ 6
2.6.
Read Only Memory (ROM)........................................................................................ 6
2.7.
Random Access Memory (RAM)............................................................................... 6
2.8.
Memory card Interface .............................................................................................. 6
2.9.
Liquid Crystal Display (LCD) ..................................................................................... 7
2.10.
Printer........................................................................................................................ 7
2.11.
Power Supply and Battery......................................................................................... 7
2.12.
Modems..................................................................................................................... 8
3.
How the Unit Works................................................................................................................. 9
3.1.
Inside the AccuVote-OS............................................................................................ 9
3.2.
Ballot reader electronics............................................................................................ 9
3.2.1.
Scanning the timing marks ............................................................................ 10
3.2.2.
White levels ................................................................................................... 10
3.2.3.
Powering the visible light emitters ................................................................. 10
3.2.4.
Ballot reader to CPU transmission ................................................................ 10
3.3.
Ballot reader motor.................................................................................................. 11
3.4.
Reader DMA interface............................................................................................. 11
3.5.
Power supply........................................................................................................... 11
3.5.1.
Battery ........................................................................................................... 12
3.6.
V25 CPU ................................................................................................................. 12
3.6.1.
Devices on the CPU ...................................................................................... 12
3.7.
ROM memory .......................................................................................................... 13
3.8.
RAM memory .......................................................................................................... 13
3.9.
32KB/64KB/128KB memory card interface............................................................. 13
3.10.
LCD module interface.............................................................................................. 14
3.11.
Printer interface ....................................................................................................... 14
