Integrated circuit of the logic circuit type comprising an electrically programmable non-volatile memory
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United States of America Patent
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Jun 6, 1989
Grant Date -
N/A
app pub date -
Nov 4, 1987
filing date -
Nov 4, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An integrated circuit of the logic circuit type includes a matrix of memory cells of the floating-gate transistor type, write and read circuits and circuitry to handle the interconnection of these circuits with the memory. The integrated circuit receives a general supply voltage Vcc, a programming voltage Vpp and an external clock signal divided into two complementary clock signals. The clock signals acts on, among others, the functioning of the write circuits. The integrated circuit further includes a circuit to detect the presence of internal clock signals. The circuit sends a signal prohibiting write operations in the memory when it detects the absence of one of the internal clock signals.
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