Appeal No. 1997-2292
Application No. 08/483,839
integrated circuit for producing a program control signal only
when a given number of clock pulses are detected during a
period when a trigger signal changes from a first state to a
second state.
Claim 1 is the only independent claim on appeal, and it
reads as follows:
1. A semiconductor integrated circuit comprising:
a clock number-detecting circuit for detecting a number
of clocks of a serially input pulse train, said clock number-
detecting circuit having an input port for receiving
said serially input pulse train and an output port for
providing an output signal having a given form only when the
serially input pulse train has a predetermined number of
clocks; and
a program control circuit for delivering a program
instruction to a memory, said program control circuit having a
first input port coupled to said clock number-detecting
circuit output port for receiving said clock number-detecting
circuit output signal, a second input port for receiving a
trigger signal and an output port for supplying said program
instruction, wherein said program control circuit delivers
said program instruction only when the signal received at said
first input port has the given form while said trigger signal
changes from a first state to a second state to prevent
writing error data to the memory.
The references relied on by the examiner are:
Lefebvre et al. (Lefebvre) 4,873,666 Oct. 10,
1989
Geadah et al. (Geadah) 4,873,667 Oct. 10,
1989
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