SEMICONDUCTOR CIRCUIT DEVICE - TOSHIBA LSI SYSTEM SUPPORT KK

Title:

SEMICONDUCTOR CIRCUIT DEVICE

Document Type and Number:

Japanese Patent JP2004038457

Kind Code:

A

Abstract:

To provide a semiconductor circuit device for making it unnecessary to synchronously arbitrate an interface between a block synchronizing with a source clock and an integrated circuit part operating with a frequency different from the source clock.

This semiconductor circuit device is provided with: a synchronous frequency-divider 11 for counting an inputted clock signal and outputting a count value; a selector circuit 20 for receiving the signal of each bit of a count value outputted from the synchronous frequency-divider 10, and outputting the carry preread signal of a certain bit as an operation processing effective state signal RSN according to a selector signal RSNSEL; and an integrated circuit part 30 using the clock signal inputted to the synchronous frequency-divider as a source and having its operation frequency switched according to the operation processing effective state signal.

Inventors:

TOMITA SEIICHI

Application Number:

JP2002193391A

Publication Date:

February 05, 2004

Filing Date:

July 02, 2002

Export Citation:

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Assignee:

TOSHIBA LSI SYSTEM SUPPORT KK
TOSHIBA CORP

International Classes:

G06F1/00; G06F1/12; H01L21/822; H01L27/04; H03K21/00; G06F1/06; H03K23/50; H04L1/22; H05K10/00; (IPC1-7): G06F1/06; G06F1/12; H01L21/822; H01L27/04; H03K21/00

Attorney, Agent or Firm:

Takehiko Suzue
Sadao Muramatsu
Atsushi Tsuboi
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai

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