US 2011/0255354 A1 · SEMICONDUCTOR INTEGRATED CIRCUIT

Abstract

Provided is a semiconductor integrated circuit according to an exemplary aspect of the present invention including a data transmitting circuit that transmits data in parallel through a plurality of signal lines and a data receiving circuit that receives the data. The data transmitting circuit includes a plurality of data output circuits that output the data in a data transmission mode or set an output to a high impedance state in a HiZ mode, a plurality of data selection circuits that select one of the data and fixed data and output the selected data to the data output circuits, and a control circuit that controls the data output circuits to output the fixed data during a period between a time when a mode is switched from the HiZ mode to the data transmission mode and a time when the data output circuits start to output the data.

Claims9

Dependent claims

A circuit comprising:

external terminals configured to output a first write command at a first time point, to start to output first write data having a first burst length at a second time point after the first time point, and configured to further output a second write command at a third time point after the first time point, and to start to output second write data having a second burst length at a fourth time point after the third time point,
wherein the external terminals are configured to output a first fixed data until the second time point and to output a second fixed data until the fourth time point.

Dependencies are inferred from the claim text.

Facts

Application

13/172,199Filed 29 Jun 2011

Priority

JP 2009-2076279 Sep 2009

Published

20 Oct 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

G11C 11/4093
Read-write [R-W] circuits: input/output [I/O] data interface arrangements, e.g. data buffers
G06F 13/4072
Electrical coupling: drivers or receivers
G11C 7/1006
Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers: data managing, e.g. manipulating data before…
G11C 7/1051
Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers: data output circuits, e.g. read-out amplifiers,…

Semiconductor integrated circuit

Life of this patent

Semiconductor integrated circuit

Life of this patent

Abstract

Claims9