How the Unit Works
© Diebold Election Systems, Inc. 2002 AccuVote-OS Hardware Guide
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3.5.1. Battery
Figure 3-2: Battery
A battery sustains power to allow normal operation without AC power. Battery placement is
illustrated in Figure 4-2. A battery will operate for up to two hours.
An AccuVote-OS installed with a battery will reject a ballot being read at the time of the power
interruption, but will allow refeeding of the ballot and continued operation under battery power.
3.6. V25
CPU
The AccuVote-OS is run with an NEC V-25 single chip microcomputer. Information gathered by
the ballot reader is transferred by means of a high speed serial input connection to an image
buffer in the CPU board’s RAM. The CPU program analyzes the data in the memory buffer to
locate the marks on the ballot.
3.6.1. Devices on the CPU
The CPU board includes:
•
the ballot reader interface
•
the CPU
•
ROM chips
•
RAM chips
•
the memory card interface
•
LCD interface
•
internal printer interface
•
RS-232 serial interfaces
•
ballot deflector/feeder controller
•
SmartWatch ROM chip (Clock Chip)
