CONTROL METHOD FOR DIFFERENTIAL DRIVER AND DIFFERENTIAL RECEIVER OF DIFFERENTIAL SCSI BUS

摘要

PROBLEM TO BE SOLVED: To reduce the control signal of the differential driver/receiver or differential transceiver of the data signal of an SCSI bus. ;SOLUTION: The differential driver 201 and the differential receiver 202 of a data signal Dn and a parity bit signal Dp are controlled by an ARBEN signal and a DOEN signal outputted from an SCSI control circuit. A logic circuit 205 is provided in every differential driver 201. The differential driver 201 is set in a differentiated state only when the logic value of the signal Dn or Dp shows '1' by aserting the ARBEN signal, and the differential driver 202 is set in the differentiated state regardless of the logic value of the signal Dn or Dp by aserting the DOEN signal. The differential receiver 202 is set in the differentiated state by negating the DOEN signal.;COPYRIGHT: (C)1997,JPO