**Exhibit 31.1**

**CERTIFICATION OFCHIEF EXECUTIVE OFFICER PURSUANT TOSECURITIES EXCHANGE ACT RULES 13A-15(e), AS ADOPTED PURSUANTTO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002**

I, Fumihiro Kozato,certify that:

1.                                       Ihave reviewed this quarterly report on Form 10-Q of Techwell, Inc.for the period ended September 30, 2006;

2.                                       Basedon my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this report;

3.             Based on my knowledge, thecondensed consolidated financial statements, and other financial informationincluded in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this report;

4.             The registrant’s other certifyingofficer and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange ActRules 13a-15(e) and 15d-15(e)) for the registrant and have:

(a)           Designed such disclosure controls andprocedures, or caused such disclosure controls and procedures to be designedunder our supervision, to ensure that material information relating to theregistrant, including its consolidated subsidiaries, is made known to us byothers within those entities, particularly during the period in which thisreport is being prepared;

(b)           Evaluated the effectiveness of theregistrant’s disclosure controls and procedures and presented in this reportour conclusions about the effectiveness of the disclosure controls andprocedures, as of the end of the period covered by this report based on such evaluation;and

(c)           Disclosed in this report any changein the registrant’s internal control over financial reporting that occurredduring the registrant’s most recent fiscal quarter (the registrant’s fourthfiscal quarter in the case of an annual report) that has materially affected,or is reasonably likely to materially affect, the registrant’s internal controlover financial reporting; and

5.             The registrant’s other certifyingofficer and I have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrant’s auditors and the auditcommittee of the registrant’s board of directors (or persons performing theequivalent functions):

(a)           All significant deficiencies andmaterial weaknesses in the design or operation of internal control overfinancial reporting which are reasonably likely to adversely affect theregistrant’s ability to record, process, summarize and report financialinformation; and

(b)           Any fraud, whether or not material,that involves management or other employees who have a significant role in theregistrant’s internal control over financial reporting.

 
| Date: November  13, 2006 |
|--------------------------|
|                     |
| /s/ FUMIHIRO  KOZATO     |   |
| Fumihiro Kozato          |
| Chief Executive Officer  |

 

 

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