AU6337 USB2.0 SD/MMC/MS Single/Dual LUN Card Reader controller Technical Reference Manual AU6337 USB2.0 SD/MMC/MS Single/Dual LUN Card Reader controller Copyright Copyright © 1997 - 2007. Alcor Micro, Corp. All Rights Reserved. No part of this data sheet may be reproduced, transmitted, transcribed, stored in a retrieval system or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without prior written permission from Alcor Micro, Corp. Trademark Acknowledgements The company and product names mentioned in this document may be the trademarks or registered trademarks of their manufacturers. Disclaimer Alcor Micro, Corp. reserves the right to change this product without prior notice. Alcor Micro, Corp. makes no warranty for the use of its products and bears no responsibility for any error that appear in this document. Specifications are subject to change without prior notice. Revision History Date Revision Description July 2007 1.00W Official Release. Contact Information: Web site: http://www.alcormicro.com/ Taiwan Alcor Micro, Corp. 4F, No 200 Kang Chien Rd., Nei Hu, Taipei, Taiwan, R.O.C. Phone: 886-2-8751-1984 Fax: 886-2-2659-7723 China ShenZhen Office Rm.2407-08, Industrial Bank Building No.4013, Shennan Road, ShenZhen,China. 518026 Phone: (0755) 8366-9039 Fax: (0755) 8366-9101 Santa Clara Office 2901 Tasman Drive, Suite 206 Santa Clara, CA 95054 USA Phone: (408) 845-9300 Fax: (408) 845-9086 Los Angeles Office 9070 Rancho Park Court Rancho Cucamonga, CA 91730 USA Phone: (909) 483-9900 Fax: (909) 944-0464 <Memo> Table of Contents 1. Introduction ............................................................ 1 1.1 Description...................................................................................1 1.2 Features........................................................................................1 2. Application Block Diagram ................................... 2 3. Pin Assignment ...................................................... 3 4. System Architecture and Reference Design ....... 10 4.1 AU6337 Block Diagram ...............................................................10 5. Electrical Characteristics ...................................... 11 5.1 Absolute Maximum Ratings........................................................11 5.2 Recommended Operating Conditions .......................................11 5.3 General DC Characteristics ........................................................11 5.4 DC Electrical Characteristics of 3.3V I/O Cells..........................12 5.5 USB Transceiver Characteristics ...............................................12 5.6 Power Switch Feature .................................................................16 6. Mechanical Information ......................................... 17 7. Abbreviations ......................................................... 19 i List of Figures Figure 2.1 Block Diagram..................................................................2 Figure 3.1 48 LQFP (GBL) Pin Assignment Diagram ......................3 Figure 3.2 28SSOP (GBS) Pin Assignment Diagram ......................6 Figure 3.3 28SSOP (GCS) Pin Assignment Diagram ......................8 Figure 4.1 AU6337 Block Diagram ...................................................10 Figure 5.1 Card Detect Power-on Timing.........................................16 Figure 6.1 48 LQFP Mechanical Information Diagram ....................17 Figure 6.2 28 SSOP Mechanical Information Diagram ...................18 List of Tables Table 3.1 48 LQFP (GBL) Pin Descriptions......................................4 Table 3.2 28SSOP (GBS) Pin Descriptions ......................................7 Table 3.3 28SSOP (GCS) Pin Descriptions ......................................9 Table 5.1 Absolute Maximum Ratings .............................................11 Table 5.2 Recommended Operating Conditions .............................11 Table 5.3 General DC Characteristics ..............................................11 Table 5.4 DC Electrical Characteristics of 3.3V I/O Cells ...............12 Table 5.5 Electrical characteristics ..................................................12 Table 5.6 Static characteristic：Digital pin .....................................13 Table 5.7 Static characteristic：Analog I/O pins（DP/DM）..........13 Table 5.8 Dynamic characteristic：Analog I/O pins（DP/DM）.....14 ii 1. Introduction 1.1 Description AU6337 is an USB2.0 high-speed transmission controller, which is designed as a bridge between USB and SD/MS compatible flash card interface, such as SD, HS-SD, MMC, HS-MMC, RS-MMC, MMCmicro, MS, MS Pro and MS Duo…etc. AU6337 can read digital contents stored on memory card designed to cover a wide area of applications such as digital cameras, PDAs, MP3 players and smart phones…etc. With the AU6337, users can transfer digital data between flash memory card and PC or other electronic devices. AU6337 inherits the high-performance and cost-efficiency character from Alcor’s products, included power switch integration, dynamic icon utility support, and DMA engine integration. 1.2 Features Support USB V2.0 specification and USB Device Class Definition for Mass Storage, Bulk-Transport V1.0 Support SD/MMC/MS compatible flash card Support the latest flash card specification: SD2.0 (SDHC), MMC4.2 (8-bit), MSPro parallel mode (4-bit) Alcor DMA engine integrated for performance enhancement Work with default driver from Windows ME/2000/XP/Vista and Mac OS X; Windows 98/2000(SP1/SP2) and Mac OS 9 are supported by vendor driver from Alcor. Ping-pong FIFO implementation for concurrent bus operation Support multiple sectors transfer optimize performance Support slot-to-slot read/write operation (Dual LUN) Support Dynamic Icon Utility Support LED for bus operating indication Power switch integrated to reduce production BOM cost 5 3.3 and 3.3 1.8V regulators built in 48-pin package for two slots (SD and MS) 28-pin package for single slot (SD or MS) AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 1 2. Application Block Diagram The following application drawing demonstrates a typical card reader block diagram using AU6337. By connecting one card reader to a desktop or notebook PC through USB bus, the AU6337 becomes a bus-powered, high speed USB card reader, which can be used as a bridge for data transfer between Desktop PC and Notebook PC. Figure 2.1 Block Diagram Digital Camera MP3 Player PC with USB Host Controller PDA SD/MMC/MS USB Flash Memory Card Reader Moble Phones PC 2 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 3. Pin Assignment There are three different form factor packages available to choose from. The following figure shows signal names for each pin and the table in the page after describes each pin in details. Figure 3.1 48 LQFP (GBL) Pin Assignment Diagram VDD GND GPI0 MSBS GPON7 RSTN GPI2 SDCLK GPI3 SDDATA0 MSINS SDDATA5 48 47 46 45 44 43 42 41 40 39 38 37 EEPCLK 1 36 SDDATA4 EPPDATA 2 35 SDDATA3 REXT 3 34 GPON6 VD33P 4 33 SDDATA2 DP 5 32 SDWP DM 6 31 SDDATA1 VS33P 7 30 SDCMD XI 8 29 SD_V33 XO 9 28 MS_V33 VS33P 10 27 VDD33C VDDU 11 26 SDCDN 25 SDDATA6 AGND5V ALCOR MICRO AU6337-GBL 48PIN LQFP 12 14 15 16 17 18 19 20 21 22 23 AVDD5V VDD3V V18 VDDHM ReaderMode VSSHM MSDATA1 MSDATA0 MSDATA2 MSDATA3 MSCLK 24 SDDATA7 13 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 3 Table 3.1 48 LQFP (GBL) Pin Descriptions Pin # Pin Name I/O 1 EEPCLK O EEPROM serial clock. 2 EPPDATA I/O EEPROM for PID,VID customization. 3 REXT I External Resistor 330 to Ground 4 VD33P I Connected to 3.3V 5 DP I/O DP Signal for USB 6 DM I/O DM Signal for USB 7 VS33P I Connected to Ground 8 XI I 12 MHz crystal input. 9 XO O 12 MHz crystal output. 10 VS33P I Connected to Ground 11 VDDU I Connected to 1.8V 12 AGND5V I Ground 13 AVDD5V I 5V input 14 VDD3V O Internal Regulator 3.3V output 15 V18 O Internal Regulator 1.8V output 16 VDDHM I 3.3V input for IO 17 ReaderMode I "0" for Normal, "1" for high-Z 18 VSSHM I Ground 19 MSDATA1 I/O 20 MSDATA0 I/O 21 MSDATA2 I/O 22 MSDATA3 I/O 23 MSCLK O MS serial protocol clock. (suspend IObus is zero) 24 SDDATA7 I/O SD Data 7 25 SDDATA6 I/O SD Data 6 26 SDCDN I SD Card Detect, Low Active 27 VDD33C I Card Power switch 28 MS_V33 O MS card Power 4 Description MS Data1. zero) MS Data0. zero) MS Data2. zero) MS Data3. zero) (suspend output mode and databus is (suspend output mode and databus is (suspend output mode and databus is (suspend output mode and databus is AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W Pin # Pin Name I/O Description 29 SD_V33 O SD card Power 30 SDCMD I/O SD Command 31 SDDATA1 I/O SD Data 1 32 SDWP I 33 SDDATA2 I/O SD Data 2 34 GPON6 O Card Access LED 35 SDDATA3 I/O SD Data 3 36 SDDATA4 I/O SD Data 4 37 SDDATA5 I/O SD Data 5 38 MSINS I 39 SDDATA0 I/O 40 GPI3 I NC 41 SDCLK O SD Clock SD Write Protect MS stick insertion/extraction detect. SD Data 0 Current value. '0' for 100mA. '1' for 250mA. [Default]: '0' Reset (low active to reset the whole chip), must be pull up with RC. 42 GPI2 I 43 RSTN I 44 GPON7 O Power LED 45 MSBS O MS protocol bus state. (suspend IObus is zero) 46 GPI0 I LUN mode select '1' for share 1LUN '0' for 2LUN 47 GND I Ground 48 VDD I 1.8V input AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 5 The following figure shows signal names of each pin of the 80-pin package and the table in the page after describes each pin in details. Figure 3.2 28SSOP (GBS) Pin Assignment Diagram 6 GPI0 1 28 SDCLK GND 2 27 SDDATA0 VDD 3 26 SDDATA3 REXT 4 25 CLED VD33P 5 24 SDDATA2 DP 6 23 SDWP DM 7 22 SDDATA1 VS33P 8 21 SDCMD XI 9 20 SD_V33 XO 10 19 VDD33C VDDU 11 18 SDCDN AGND5V 12 17 VSSHM AVDD5V 13 16 VDDHM VDD3V 14 15 V18 Alcor Micro AU6337-GBS 28-PIN SSOP AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W Table 3.2 28SSOP (GBS) Pin Descriptions Pin # Pin Name I/O Description 1 GPI0 I Reserved. Always connect to 3.3V on PCB 2 GND I Core ground 3 VDD I Core 1.8V power input 4 REXT I External Resistor 330 to Ground 5 VD33P I UTMI 3.3V power input 6 DP I/O USB DP 7 DM I/O USB DM 8 VS33P I UTMI 3.3V ground 9 XI I 12MHz crystal input 10 XO O 12MHz crystal output 11 VDDU I UTMI 1.8V input 12 AGND5V I 5 to 3.3 regulator ground 13 AVDD5V I 5 to 3.3 regulator 5V input 14 VDD3V O 5 to 3.3 regulator 3.3V output 15 V18 O 3.3 to 1.8 regulator 1.8V output 16 VDDHM I IO 3.3V power / 3.3 to 1.8 regulator 3.3V input 17 VSSHM I IO 3.3V ground 18 SDCDN I SD card detect 19 VDD33C I Card power switch 3.3V input 20 SD_V33 O Card power switch output 21 SDCMD I/O SD command 22 SDDATA1 I/O SD data 1 23 SDWP I 24 SDDATA2 I/O SD data 2 25 CLED O Card Access LED 26 SDDATA3 I/O SD data 3 27 SDDATA0 I/O SD data 0 28 SDCLK O SD clock SD write protect AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 7 The following figure shows signal names of each pin of the 80-pin package and the table in the page after describes each pin in details. Figure 3.3 28SSOP (GCS) Pin Assignment Diagram 8 EEPDATA 1 28 EEPCLK REXT 2 27 VDD VD33P 3 26 GPI0 DP 4 25 MSBS DM 5 24 MSINS VS33P 6 23 CLED XI 7 22 MS_V33 XO 8 21 VDD33C VDDU 9 20 MSCLK AGND5V 10 19 MSDATA3 AVDD5V 11 18 MSDATA2 VDD3V 12 17 MSDATA0 V18 13 16 MSDATA1 VDDHM 14 15 VSSHM Alcor Micro AU6337-GCS 28-PIN SSOP AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W Table 3.3 28SSOP (GCS) Pin Descriptions Pin # Pin Name I/O Description 1 EEPDATA I/O 2 REXT I External Resistor 330 to Ground 3 VD33P I UTMI 3.3V power input 4 DP I/O USB DP 5 DM I/O USB DM 6 VS33P I UTMI 3.3V ground 7 XI I 12MHz crystal input 8 XO O 12MHz crystal output 9 VDDU I UTMI 1.8V input 10 AGND5V I 5 to 3.3 regulator ground 11 AVDD5V I 5 to 3.3 regulator 5V input 12 VDD3V O 5 to 3.3 regulator 3.3V output 13 V18 O 3.3 to 1.8 regulator 1.8V output 14 VDDHM I IO 3.3V power / 3.3 to 1.8 regulator 3.3V input 15 VSSHM I IO 3.3V ground 16 MSDATA1 I/O Memory Stick Data1 17 MSDATA0 I/O Memory Stick Data0 18 MSDATA2 I/O Memory Stick Data2 19 MSDATA3 I/O Memory Stick Data3 20 MSCLK O Memory clock 21 VDD33C I Card power switch 3.3V input 22 MS_V33 O Card power switch output 23 CLED O Card Access LED 24 MSINS I 25 MSBS O Memory Stick BS 26 GPI0 I Reserved. Always connect to 3.3V on PCB 27 VDD I Core 1.8V power input 28 EEPCLK O EEPROM clock EEPROM data AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 9 4. System Architecture and Reference Design 4.1 AU6337 Block Diagram Figure 4.1 AU6337 Block Diagram USB USB Upstream Port XCVR SIE Processor 1.8 V RAM ROM SD/MMC/MS Control FIFO SD MMC MS Arbitrator 3.3V Voltage Regulator 5V 10 12MHz XTAL AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 5. Electrical Characteristics 5.1 Absolute Maximum Ratings Table 5.1 Absolute Maximum Ratings SYMBOL PARAMETER RATING UNITS VDDHM VDD33C Power Supply -0.3 to VDDH +0.3 V VIN Input Signal Voltage -0.3 to 3.6 V VOUT Output Signal Voltage -0.3 to VDDH +0.3 V TSTG Storage Temperature -40 to 150 O C 5.2 Recommended Operating Conditions Table 5.2 Recommended Operating Conditions SYMBOL PARAMETER MIN TYP MAX UNITS AVDD5V 5V Power Supply 4.75 5.0 5.0 V Power Supply 3.0 3.3 3.6 V Digital Supply 1.62 1.8 1.98 V VIN Input Signal Voltage 0 3.3 3.6 V TOPR Operating Temperature 0 VDDHM VDD33C VDD V18 O 85 C 5.3 General DC Characteristics Table 5.3 General DC Characteristics SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IIN Input current No pull-up or pull-down -10 ±1 10 µA IOZ Tri-state leakage current -10 ±1 10 µA CIN Input capacitance Pad Limit 2.8 ρF COUT Output capacitance Pad Limit 2.8 ρF CBID Bi-directional buffer capacitance Pad Limit 2.8 ρF AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 11 5.4 DC Electrical Characteristics of 3.3V I/O Cells Table 5.4 DC Electrical Characteristics of 3.3V I/O Cells SYMBOL PARAMETER CONDITIONS VDDHM VDD33C Power supply 3.3V I/O Vil Input low voltage Limits UNIT MIN TYP MAX 3.0 3.3 3.6 V 0.8 V LVTTL Vih Input high voltage Vol Output low voltage ∣Iol∣=2~16mA Voh Output high voltage ∣Ioh∣=2~16mA 2.4 Rpu Input pull-up resistance PU=high, PD=low 55 75 110 KΩ Input pull-down resistance PU=low, PD=high 40 75 150 KΩ -10 ±1 10 μA -10 ±1 10 μA Rpd Iin Input leakage current Ioz Tri-state output leakage current 2.0 Vin= VDDHM or 0 V 0.4 V V 5.5 USB Transceiver Characteristics Table 5.5 Electrical characteristics Symbol Parameter VD33P Min. Typ. Analog supply Voltage 3.0 3.3 3.6 V VDD V18 Digital supply Voltage 1.62 1.8 1.98 V ICC Operating supply current 55 mA 120 µA ICC (susp) 12 Conditions High speed operating at 480 MHz In suspend mode, current with 1.5kΩ Suspend supply current pull-up resistor on pin RPU disconnected Max. Unit AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W Table 5.6 Static characteristic：Digital pin Symbol Parameter Conditions Min. Typ. Max. Unit 0.8 V Input levels VIL Low-level input voltage VIH High-level input voltage 2.0 V Output levels VOL Low-level output voltage VOH High-level output voltage 0.2 V V VDDHM-0.2 Table 5.7 Static characteristic：Analog I/O pins（DP/DM） Symbol Parameter Conditions Min. Typ. Max. Unit VHSDIFF VHSCM USB2.0 Transceiver（HS） Input Levels（differential receiver） ∣VI（DP）-VI（DM）∣ High speed differential measured at the 300 input sensitivity connection as application circuit High speed data signaling common mode voltage -50 range VHSSQ High speed squelch detection threshold VHSDSC High speed disconnection detection threshold mV Squelch detected No squelch detected Disconnection detected Disconnection not detected Output Levels 500 mV 100 mV 150 mV 625 mV 525 mV -10 10 mV -10 10 mV -360 400 mV 700 1100 mV -900 -500 mV 9 Ω AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 13 VHSOI VHSOL VHSOH VCHIRPJ VCHIRPK RDRV High speed idle level output voltage(differential) High speed low level output voltage(differential) High speed high level output voltage(differential) Chirp-J output voltage （differential） Chirp-K output voltage （differential） Resistance Equivalent resistance Driver output impedance used as internal chip only 3 6 Overall resistance including external resistor Termination 40.5 45 Termination voltage for pull-up resistor on pin 3.0 RPU USB1.1 Transceiver（FS/LS） Input Levels（differential receiver） Differential input ∣VI（DP）-VI（DM）∣ 0.2 sensitivity Differential common 0.8 mode voltage Input Levels（single-ended receivers） Single ended receiver 0.8 threshold Output levels VTERM VDI VCM VSE 49.5 3.6 V V 2.5 V 2.0 V VOL Low-level output voltage 0 0.3 V VOH High-level output voltage 2.8 3.6 V Table 5.8 Dynamic characteristic：Analog I/O pins（DP/DM） Symbol Parameter Conditions Min. Typ. Max. Unit Driver Characteristics High-Speed Mode tHSR tHSF High-speed differential rise time High-speed differential fall time 500 ps 500 ps Full-Speed Mode tFR tFF tFRMA VCRS CL=50pF；10 to 90﹪ of∣VOH-VOL∣； CL=50pF；90 to 10﹪ Fall time of∣VOH-VOL∣； Excluding the first Differential rise/fall time transition from idle matching（tFR / tFF） mode Excluding the first Output signal crossover transition from idle voltage mode Rise time 4 20 ns 4 20 ns 90 110 ％ 1.3 2.0 V 75 300 ns Low-Speed Mode tLR 14 Rise time CL=200pF-600pF； 10 to 90﹪of ∣VOH-VOL∣； AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W tLF Fall time tLRMA Differential rise/fall time matching（tLR / tLF） VCRS Output signal crossover voltage VOH High-level output voltage CL=200pF-600pF； 90 to 10﹪of ∣VOH-VOL∣； Excluding the first transition from idle mode Excluding the first transition from idle mode 75 300 ns 80 125 ％ 1.3 2.0 V 2.8 3.6 V AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 15 5.6 Power Switch Feature AU6337 integrates a 5V to 1.8V voltage regulator and power switch to replace all MOS chips for flash card power supply. Card Power Output Current Range For SD/MMC/MS MAX: 200mA Card power output voltage range MS/SD/MMC: 3.3V±0.3V AU6337 will turn off all of Card Power in suspend mode Figure 5.1 Card Detect Power-on Timing 16 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 6. Mechanical Information Figure 6.1 48 LQFP Mechanical Information Diagram E 0.25 E1 1 A GAUGE PLANE 1 D D SEATING PLANE L L1 MIN. MAX. -1.6 0.05 0.15 1.35 1.45 0.09 0.16 9.00 BSC 7.00 BSC 9.00 BSC 7.00 BSC 0.5 BSC 0.17 0.27 0.45 0.75 1 REF A SYMBOLS A A1 A2 c1 D D1 E E1 e b L L1 2 A 1 C b e 1. 2. JEDEC OUTLINE: MS-026 BBC DIMENSIONS D1 AND E1 DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS 0.25mm PER SIDE. D1 AND E1 ARE MAXIMUM PLASTIC BODY SIZE DIMENSIONS IMCLUDING MOLD MISMATCH. 3. DIMENSION b DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL NOT CAUSE THE LEAD WIDTH TO EXCEED THE MAXIMUM b DIMENSION BY MORE THAN 0.08mm AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 17 Figure 6.2 28 SSOP Mechanical Information Diagram SYMBOLS A A1 A2 b c D E E1 e L R θ° 18 MIN -0.05 1.65 0.22 0.09 10.05 7.40 5.00 0.55 0.09 0° UNIT: MM NOM -1.75 10.20 7.80 5.30 0.65 BSC 0.75 4° MAX. 2.0 1.85 0.38 0.25 10.50 8.20 5.60 0.95 8° 1. JEDEC OUTLINE: MS-026 BBC 2. DIMENSIONS D1 AND E1 DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS 0.25mm PER SIDE. D1 AND E1 ARE MAXIMUM PLASTIC BODY SIZE DIMENSIONS IMCLUDING MOLD MISMATCH. 3. DIMENSION b DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL NOT CAUSE THE LEAD WIDTH TO EXCEED THE MAXIMUM b DIMENSION BY MORE THAN 0.08mm AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 7. Abbreviations In this chapter some of the terms and abbreviations used throughout the technical reference manual are listed as follows. SIE SD MS MMC UTMI Serial Interface Engine Secure Digital Memory Stick Multimedia Card USB Transceiver Macrocell Interface About Alcor Micro, Corp. Alcor Micro, Corp. designs, develops and markets highly integrated and advanced peripheral semiconductor, and software driver solutions for the personal computer and consumer electronics markets worldwide. We specialize in USB solutions and focus on emerging technology such as USB and IEEE 1394. The company offers a range of semiconductors including controllers for USB hub, integrated keyboard/USB hub and USB Flash memory card reader…etc. Alcor Micro, Corp. is based in Taipei, Taiwan, with sales offices in Taipei, Japan, Korea and California. Alcor Micro is distinguished by its ability to provide innovative solutions for spec-driven products. Innovations like single chip solutions for traditional multiple chip products and on-board voltage regulators enable the company to provide cost-efficiency solutions for the computer peripheral device OEM customers worldwide. AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 19