Patent ID: 6151649
Filing Date: 2000-11-21
Classification: G06F

Abstract:
A Small Computer System Interface (SCSI) bus switching circuit comprising:a first SCSI input/output port having a plurality of first port terminals;a second SCSI input/output port having a plurality of second port terminals;a terminator circuit coupled to and receiving a termination power (TERM PWR) voltage from a first side of said bus and selectively providing electrical termination of said SCSI bus;a reference voltage generator for generating a reference voltage;a voltage comparator circuit for comparing a termination power (TERM PWR) voltage received over said SCSI bus from a first side of said SCSI bus with said reference voltage and for generating a switch control signal having a first state when said first voltage has a predetermined magnitude relationship relative to said reference voltage; anda multi-pole switch for coupling said first port terminals to said terminator circuit and decoupling said first port terminals from said second port terminals to isolate said first port terminals from said second port terminals in response to receipt of said first state of said switch control signal and for coupling said first port terminals to said second port terminals in response to receipt of another state of said switch control signal.