Port expander architecture for mapping a first set of addresses

Details Port expander architecture for mapping a first set of addresses Port expander architecture for mapping a first set of addresses

1992-06-12

1993-09-07

Lee, Thomas C.

Boots, shoes, and leggings

395325, 364DIG2, 36492795, 36492799, 36494991, G06F 1314

Patent

active

052437000

ABSTRACT:
A port expander for providing an external memory to be used with a microcontroller but recapturing the use of I/O ports which are lost due to the coupling of the memory. Two ports are coupled to the microcontroller for transfer of address and data information. An EPROM in the port expander provides the external memory while a special function register is used to couple data to and from two I/O ports. A configuration register provides programmability of which address values address the memory and which address values address the special function registers.

REFERENCES:
patent: 3639909 (1972-02-01), Hauck et al.
patent: 4093982 (1978-06-01), Heuer et al.
patent: 4649471 (1987-03-01), Briggs et al.
patent: 4649476 (1987-03-01), Sibigtroth
patent: 4718044 (1988-01-01), Matsuyama
patent: 4839795 (1989-06-01), Iwasaki
patent: 4945472 (1990-07-01), Sakamura et al.
patent: 4991085 (1991-02-01), Pleva et al.
patent: 5025368 (1991-06-01), Watanabe
patent: 5047922 (1991-09-01), Borkar
patent: 5084814 (1992-01-01), Vaglica et al.

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