Memory with termination circuit

摘要

Provided is a semiconductor integrated circuit according to an exemplary aspect of the present invention including first and second transmitter-receivers that execute transmission and reception of data through a signal line. The first transmitter-receiver includes a first termination circuit that includes a first resistor and a first switch, the first resistor being provided between a first power supply terminal and the signal line, the first switch controlling a current flowing through the first resistor to be turned on and off, and a control circuit that outputs a first control signal to the first termination circuit so that the first switch is turned on when the first transmitter-receiver receives data, the first switch is turned off when the first transmitter-receiver transmits the data, and the first switch is continuously on during a first predetermined period after receiving the data when the first transmitter-receiver further receives another data after receiving the data.

主权项

1. A semiconductor integrated circuit comprising:
a first external terminal connected to a first external line; a second external line different from the first external line; and a transmitter-receiver that transmits and receives data to and from outside by the first external terminal and transmits a first control signal by the second external line, wherein: when the data is received by the first external terminal, the transmitter-receiver sets the first control signal for a first termination circuit provided outside to have a first potential level, when the data is transmitted by the first external terminal, the transmitter-receiver sets the first control signal for the first termination circuit to have a second potential level, and when another data is transmitted after the data is transmitted, the transmitter-receiver keeps the first control signal to have the second potential level when a data transmission interval from a time when the data is transmitted to a time when the other data is transmitted is equal to or smaller than a first threshold and changes the second potential level of the first control signal to the first potential level when the data transmission interval exceeds the first threshold.