MC2502 View Datasheet(PDF) - PMD
Part Name
Description
MFG CO.
'MC2502' PDF : 51 Pages View PDF
6.8 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.
MC2502 Technical Specifications
50
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