Reset based computer bus identification method and circuit resil

Details Reset based computer bus identification method and circuit resil Reset based computer bus identification method and circuit resil

1995-03-24

1997-03-04

Ray, Gopal C.

395306, 395308, 395309, G06F 1300, G06F 1342

Patent

active

056088779

ABSTRACT:
An automatic bus identification circuit is provided in a device to reliably detect system bus type on power up despite fluctuations in supply voltage. A system bus type signal is received over a multi-function input line at a first input and a reset signal received over a set line at a second input. A bus type identification circuitry is provided to latch the system bus type signal upon power up and continuously output this signal as a system bus type identification signal. To prevent the influence of disturbances in the power supply upon power-up, a flip-flip is provided to output a logic signal in response to a system reset signal. The flip-flop is configured with a strong-N type inverter to insure that the flip-flop will be set into a grounded state as power is applied to the circuit, despite the influence of transient power supply voltages.

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