MC2400 Datasheet, PDF (57/59 Pages) List of Unclassifed Manufacturers – Navigator Motion Processor

6.11 User-defined I/O
The interface between the Navigator chipset and 16 bits of user output and 16 bits of user input is
shown in the following figure.
Comments on Schematic
The schematic implements 1 word of user output registered in the 74LS377’s and 1 word of user
inputs read via the 244’s. The schematic decodes the low 3 bits of the address to 8 possible UIO
addresses UIO0 through UIO7. Registers and buffers are shown for only UIO0, but the
implementation shown may be easily extended. The lower 8 address bits may be decoded to provide
up to 256 user output words and 256 user input words of 16 bits.
MC2400 Technical Specifications
57