[Title of Each Class Name of Each Exchange On Which Registered American Depositary Shares NASDAQ Global Select Market Ordinary Shares, par value $0.00002 per share None (Title of Class) None (Title of Class) Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the] [Significant Subsidiaries of O 2 MICRO INTERNATIONAL LIMITED O 2 Micro, Inc., a California corporation O 2 Micro Electronics, Inc., a Taiwan company O 2 Micro International Japan Limited, a Japanese company O 2 Micro PTE Limited-Singapore, a Singapore company Aotu Micro (Wuhan) Co., Ltd., a Chinese company O 2 Micro (Beijing) Co., Ltd., a Chinese company O 2 Micro] [CERTIFICATION I, Sterling Du, certify that: 1. I have reviewed this annual report on Form 20-F of O 2 Micro International Limited; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such] [CERTIFICATION I, Perry Kuo, certify that: 1. I have reviewed this annual report on Form 20-F of O 2 Micro International Limited; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such] [2 Micro International Limited O CERTIFICATION 2 (1) (2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated. May 12, 2009 Sterling Du Chief Executive Officer May 12, 2009 Perry Kuo Chief Financial Officer] [CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements Nos. 333-12670, 333-12672, 333-98425, 333-101452, 333-107975, 333-116596, 333-132251 and 333-153436 on Form S-8 of our reports relating to the consolidated financial statements of O 2 Micro International Limited and the effectiveness of O 2 Micro International Limited’s internal control over financial reporting]

[Title of Each Class Name of Each Exchange On Which Registered American Depositary Shares NASDAQ Global Select Market Ordinary Shares, par value $0.00002 per share None (Title of Class) None (Title of Class) Indicate the number of outstanding shares of each of the issuers classes ofpital ormmon stock of the close of the periodvered by] [Significant Subsidiaries of O 2 O 2 Micro, aliforniarporation 2 Micro Electronics, a Taiwanmpany SIZE="2">O O 2 Micro International Japan Limited, a Japanesempany O 2 MicroE Limited-Singapore, a Singaporempany Aotu Micro (Wuhan) a Chinesempany O 2 O 2 Micro (China) a Chinesempany] [CERTIFICATION FACE="Times New Roman" SIZE="2"> I, Sterling Du, certify that: 1. I have reviewed this annual report on Form 20-F of O 2 Micro International Limited; 2. Based on my knowledge, this report does notntain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made,] [CERTIFICATION FACE="Times New Roman" SIZE="2"> I, Perry Kuo, certify that: 1. I have reviewed this annual report on Form 20-F of O 2 Micro International Limited; 2. Based on my knowledge, this report does notntain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made,] [2 O CERTIFICATION 2 (1) (2) the informationntained in the Report fairly presents, inl material respects, the financialndition and results of operations of thempany at thetes and for the periods indicated. May12, 2009 Sterling Du Chief Executive Officer May12, 2009 Perry Kuo Chief Financial Officer dex13.htm] [FACE="Times New Roman" SIZE="2">CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Wensent to theorporation by reference in the Registration Statements Nos. 333-12670, 333-12672, 333-98425, 333-101452, 333-107975, 333-116596, 333-132251 and 333-153436 on Form S-8 of our reports relating to thensolidated financial statements of O 2 Micro International Limited and the effectiveness of O]