Appeal No. 2004-1596
Application No. 09/544,858
diagram for a legacy Low Pin Count (LPC) bus transaction on a
single protocol system includes a plurality of different START
signals, of which only the last signal 350A is used by the target
device (specification, page 12). According to Appellant’s
invention, depicted in Figure 6, the value of the captured START
signal 650A indicates that START signal 350A and the following
signal correspond to standard LPC bus transaction (id.). Thus,
any device addressed by the standard LPC bus transaction ignores
the extended LPC transactions.
Representative independent claim 1 is reproduced below:
1. A method for performing transactions over a bus,
comprising:
transmitting a first signal;
transmitting a second signal indicating a transaction
request encoded according to at least one of a first protocol and
a second protocol;
determining that the first protocol is used by a first
device to decode the transaction using the first signal and the
second signal; and
determining that the second protocol is used by a second
device to decode the transaction using the second signal, the
second device being adapted to ignore the first signal.
The Examiner relies on the following references in rejecting
the claims:
Kowalski 5,420,412 May 30, 1995
Hewitt 5,898,886 Apr. 27, 1999
2
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