External expansion bus interface circuit for connecting a micro control unit, and a digital recording and reproducing apparatus incorporating said interface circuit
First Claim
1. An external expansion bus interface circuit for connecting a peripheral to a micro control unit to exchange digital information under an external expansion memory mode of said micro control unit, said circuit comprising:
- memory means for storing a data; and
address decoding means for receiving said data, an address strobe, and a write strobe from said micro control unit to produce an enable signal for enabling said memory means to store said data at address designated said data.
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Accused Products
Abstract
An external expansion bus interface circuit is provided for connecting a peripheral to a micro control unit to exchange digital information under an external expansion memory mode of the micro control unit. For this purpose, the eternal expansion bus interface circuit includes a means for storing a writing data. Address decoder and a strobe decoder are connected to the micro control unit to directly receive the writing data, an address strobe, and a write strobe. Then the address decoder and strobe decoder produce a write enable signal for enabling the memory to store the data at address designated thereby.
12 Citations
2 Claims
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1. An external expansion bus interface circuit for connecting a peripheral to a micro control unit to exchange digital information under an external expansion memory mode of said micro control unit, said circuit comprising:
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memory means for storing a data; and address decoding means for receiving said data, an address strobe, and a write strobe from said micro control unit to produce an enable signal for enabling said memory means to store said data at address designated said data.
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2. A digital recording and reproducing apparatus exchanging digital information between a peripheral and a micro control unit under an external expansion memory mode thereof, said apparatus comprising:
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external expansion bus interface circuit for connecting said micro control unit to said peripheral under an external expansion memory mode comprising; first memory means for storing a data; and address decoding means for receiving said data, an address strobe, and a write strobe from said micro control unit to produce an enable signal for enabling said memory means to store said data at address designated said data; second memory means for storing said digital information.
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Specification