MC3510 Datasheet, PDF (72/75 Pages) List of Unclassifed Manufacturers – Pilot Motion Processor

7.7 16-bit A/D Input
The interface between the MC3510 chip and a 16-bit A/D converter as a parallel input position
device is shown in the following figure.
Comments on Schematic
The schematic shows a 16 bit A/D used to provide parallel position input to axis 1. The 374
registers are required on the output of the A/D converters to make the 68-nanosecond access time
of the CP. The worst-case timing of the A/D’s specify 83 nanoseconds for data on the bus and 83
nanoseconds from data to tri-state on the bus. Each time the data is read the 169 counter is set to
703 decimal. This provides a 35.2-microsecond delay before the next conversion. With a 10-
microsecond conversion time the data will be available for the next set of reads after 50
microseconds. The delay is used to provide a position sample close to the actual position.
MC3510 Technical Specifications
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