Semiconductor integrated circuit, apparatus with semiconductor integrated circuit, and clock control method in semiconductor integrated circuit

Patent metadata

Field	Value
Publication number	US-9432011-B2
Application number	US-201514856253-A
Country	US
Kind code	B2
Filing date	Sep 16, 2015
Priority date	Sep 18, 2014
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A semiconductor integrated circuit includes, a fixed frequency-division clock generation unit configured to generate a fixed frequency-division clock with a fixed frequency based on an output clock of a clock source, a variable frequency-division clock generation unit configured to generate a variable frequency-division clock with a variable frequency based on the output clock of the clock source, and a data path selection unit configured to select a data path. The data path selection unit selects a data path with or without a synchronization unit for converting the data into clock-synchronous data on a receiving side according to whether the variable frequency-division clock is or is not, respectively, generated by the variable frequency-division clock generation unit.

First claim

What is claimed is:

1. A semiconductor integrated circuit comprising:
a fixed frequency-division clock generation unit configured to generate a fixed frequency-division clock with a fixed frequency based on an output clock of a clock source;
a variable frequency-division clock generation unit configured to generate a variable frequency-division clock with a variable frequency based on the output clock of the clock source; and
a data path selection unit configured to select a d…

Assignees

• Canon Kk

Inventors

• Niitsuma Hiroaki

Classifications

• H03K2005/00286

  Electricity · mapped topic

• G11C11/4076

  Physics · mapped topic

• H03K5/135 Primary

  Electricity · mapped topic

• G06F1/06

  Physics · mapped topic

• G06F1/04

  Physics · mapped topic