Receiving circuit, memory interface circuit, and receiving method

摘要

A receiving circuit that receives differential data strobe signals between a controller and a memory, the receiving circuit includes: a first receiver that compares one of the differential data strobe signals to the other, output a high logic value when the one of the differential data strobe signals is higher than the other, and output a low logic value when the one is lower than the other; a second receiver that compares one of the differential data strobe signals to a strobe reference voltage, output a high logic value when the one of the differential data strobe signals is higher than the strobe reference voltage, and output a low logic value when the one of the differential data strobe signals is lower than the strobe reference voltage; and a determination circuit that outputs a logical OR of an output of the first receiver and an output of the second receiver.

主权项

1. A receiving circuit that receives differential data strobe signals between a controller and a memory, the receiving circuit comprising:
a first receiver that compares a normal phase signal of the differential data strobe signals to an inverted phase signal of the differential data strobe signals, outputs a high logic value when the normal phase signal is higher than the inverted phase signal, outputs a low logic value when the normal phase signal is lower than the inverted phase signal, and output a value that is different from the high logic value or the low logic value when the normal phase signal is equal to the inverted phase signal; a second receiver that compares the normal phase signal of the differential data strobe signals to a strobe reference voltage, outputs a high logic value when the normal phase signal is higher than the strobe reference voltage, outputs a low logic value when the normal phase signal is lower than the strobe reference voltage, and outputs a value that is different from the high logic value or the low logic value when the normal phase signal is equal to the strobe reference voltage; and a determination circuit that outputs a logical OR of an output of the first receiver and an output of the second receiver.