Upgradeable remote control device
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United States of America Patent
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Sep 14, 1999
Issued Date -
N/A
app pub date -
Jun 16, 1997
filing date -
Oct 14, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The universal remote control system includes input means, signal output means for supplying a signal to a controlled device and a central processing unit coupled to the input means and the signal output means, no ROM, and a single non-volatile, read-write RAM coupled to said central processing unit. The RAM in the ROM-less microprocessor system is loaded by carrying out the following steps: (a) disabling the central processing unit; (b) connecting a separate microprocessor system to said RAM; (c) transferring instructions and/or data to said RAM; (d) re-enabling the central processing unit to enable the central processing unit to execute the instructions so transferred.
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