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Service Guide DOC-IT3000/4000
Chapter 2 Principles of Operation
2.1.01 Main Control Board
The main control board controls reception of the data through a host I/F, processes command
analysis, controls the scanner unit, outputs data, and controls the operation panel.
The hardware configuration of the main control board is as follows.
CPU (80C154)
- The CPU 80C154 is a one chip controller linked to many CPU peripheral units. The
Controller uses an INT Timer
- Interrupt Controller: INT0 and INT1 are used to request an interrupt. The interrupt
Controller has been programmed so that proper processing is selected when a signal is
input according to an internal table of the CPU.
Memory Map (on Master CPU Side)
The memory layout of the Doc-It Engine is shown below.
Summary of Contents for DOC-IT3000
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