Sleep and stall in an in-circuit emulation system
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United States of America Patent
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Aug 10, 2010
Grant Date -
N/A
app pub date -
Nov 19, 2001
filing date -
Nov 19, 2001
priority date (Note) -
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Abstract
A method and apparatus for performing sleep and stall operations in a system that includes a device under test and that includes an emulator device that operates to perform a sequence of instructions in lock-step fashion with the device under test. When a first signal is received at the device under test, the device under test initiates the sleep function and turns off its clocks. When the clocks are turned off, the emulator device discontinues execution of the sequence of instructions. When the sleep function has been completed by the device under test a second signal is sent to the emulator device. Execution of the sequence of instructions is resumed when the number of clock signals received at the emulator device since the second signal was received equals a predetermined value.
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