Figure 1-5 The Printer's I 2 C Bus - Tektronix Phaser 360 Service Manual

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General Information
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An internal data bus, called the I C bus, connects all I/O boards to the main
board. Through this single bus, the main board can "poll" the I/O boards for the
state of the printer's sensors as well as actuate the printer's solenoids. This data
bus greatly simplifies the wiring that would otherwise be required for
monitoring numerous sensors and solenoids.
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I C bus
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Figure 1-5 The printer's I C bus
Service Manual 1-7