DIGITAL DATA ARITHMETIC UNIT

Title:

DIGITAL DATA ARITHMETIC UNIT

Document Type and Number:

Japanese Patent JP2004326282

Kind Code:

A

Abstract:

To provide a digital data arithmetic unit that enables minimum testing terminals and a test on a peripheral circuit as an external interface with the same normal signal transmission path and timing by a simple structure.

An arithmetic LSI 16 comprising a serial/parallel conversion part (SP part) 17 for converting input serial data to first parallel data, a digital signal arithmetic part (DSP part) 18 for digitizing the first parallel data to second parallel data, and a parallel/serial conversion part (PS part) 19 for converting given parallel data to serial data and outputting them has a selector part 20 for switching the parallel data given to the parallel/serial conversion part 19 from the second parallel data to the first parallel data in response to a test switch signal input at a test.

Inventors:

MATSUOKA HIROYUKI

Application Number:

JP2003117864A

Publication Date:

November 18, 2004

Filing Date:

April 23, 2003

Export Citation:

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Assignee:

SHARP KK

International Classes:

G06F11/22; G11B20/18; H03M9/00; (IPC1-7): G06F11/22; G11B20/18; H03M9/00

Domestic Patent References:

JP2002300700A	2002-10-11
JP2002358639A	2002-12-13
JP2003060813A	2003-02-28

Attorney, Agent or Firm:

Shizuo Sano
Shigeki Yamada
Junji Kodera

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