External storage device and method of accessing same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 29, 2003
Grant Date -
N/A
app pub date -
Aug 24, 2000
filing date -
Mar 6, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An I/O expansion device for additional inputs and outputs, and an apparatus and a method for applying this device. The device includes a connector (CN1) for the connection with a parallel port, a plurality of 4-bit input/output ports, and an I/O expansion circuit (100) having a 4-bit data bus for data transfer between a plurality of 4-bit input/output ports and the connector. The I/O expansion circuit (100) includes a control input CTRL including a strobe PROG for controlling fetch of the command for selecting the input/output ports and an operation mode, a data input DIN that recieves a command in accordance with the state transition of the strobe PROG and data to be transferred to the input/output port selected by the command and a data output DOUT for giving the state of the selected port through the connector.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully