AU6337

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 July 2007 Revision 1.00W Description Official Release. Contact Information: Web site: http://www.alcormicro.com/ China ShenZhen Office Rm.2407-08, Industrial Bank Building No.4013, Shennan Road, ShenZhen,China. 518026 Phone: (0755) 8366-9039 Fax: (0755) 8366-9101 Los Angeles Office 9070 Rancho Park Court Rancho Cucamonga, CA 91730 USA Phone: (909) 483-9900 Fax: (909) 944-0464 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 Santa Clara Office 2901 Tasman Drive, Suite 206 Santa Clara, CA 95054 USA Phone: (408) 845-9300 Fax: (408) 845-9086  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 SDDATA0 SDDATA5 GPON7 SDCLK MSINS MSBS RSTN GPI0 GPI2 GPI3 GND 47 48 EEPCLK EPPDATA REXT VD33P DP DM VS33P XI XO VS33P VDDU AGND5V 1 VDD 2 3 4 5 6 7 8 9 10 11 12 13 AVDD5V 46 45 44 43 42 41 40 39 38 37 36 SDDATA4 SDDATA3 GPON6 SDDATA2 SDWP SDDATA1 SDCMD SD_V33 MS_V33 VDD33C SDCDN SDDATA6 35 34 33 32 ALCOR MICRO AU6337-GBL 48PIN LQFP 31 30 29 28 27 26 25 14 15 16 17 18 19 20 21 22 23 24 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W VDD3V V18 VDDHM ReaderMode VSSHM MSDATA1 MSDATA0 MSDATA2 MSDATA3 MSCLK SDDATA7 3 Table 3.1 48 LQFP (GBL) Pin Descriptions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name EEPCLK EPPDATA REXT VD33P DP DM VS33P XI XO VS33P VDDU AGND5V AVDD5V VDD3V V18 VDDHM ReaderMode VSSHM MSDATA1 MSDATA0 MSDATA2 MSDATA3 MSCLK SDDATA7 SDDATA6 SDCDN VDD33C MS_V33 I/O O I/O I I I/O I/O I I O I I I I O O I I I I/O I/O I/O I/O O I/O I/O I I O Description EEPROM serial clock. EEPROM for PID,VID customization. External Resistor 330 to Ground Connected to 3.3V DP Signal for USB DM Signal for USB Connected to Ground 12 MHz crystal input. 12 MHz crystal output. Connected to Ground Connected to 1.8V Ground 5V input Internal Regulator 3.3V output Internal Regulator 1.8V output 3.3V input for IO "0" for Normal, "1" for high-Z Ground 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 MS serial protocol clock. (suspend IObus is zero) SD Data 7 SD Data 6 SD Card Detect, Low Active Card Power switch MS card Power 4 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W Pin # 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Pin Name SD_V33 SDCMD SDDATA1 SDWP SDDATA2 GPON6 SDDATA3 SDDATA4 SDDATA5 MSINS SDDATA0 GPI3 SDCLK GPI2 I/O O I/O I/O I I/O O I/O I/O I/O I I/O I O I SD card Power SD Command SD Data 1 SD Write Protect SD Data 2 Card Access LED SD Data 3 SD Data 4 SD Data 5 Description MS stick insertion/extraction detect. SD Data 0 NC SD Clock Current value. '0' for 100mA. '1' for 250mA. [Default]: '0' Reset (low active to reset the whole chip), must be pull up with RC. Power LED MS protocol bus state. (suspend IObus is zero) LUN mode select '1' for share 1LUN '0' for 2LUN Ground 1.8V input 43 44 45 46 47 48 RSTN GPON7 MSBS GPI0 GND VDD I O O I I I 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 GPI0 GND VDD REXT VD33P DP DM VS33P XI XO VDDU AGND5V AVDD5V VDD3V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 SDCLK SDDATA0 SDDATA3 CLED SDDATA2 SDWP SDDATA1 SDCMD SD_V33 VDD33C SDCDN VSSHM VDDHM V18 Alcor Micro AU6337-GBS 28-PIN SSOP 6 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W Table 3.2 28SSOP (GBS) Pin Descriptions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name GPI0 GND VDD REXT VD33P DP DM VS33P XI XO VDDU AGND5V AVDD5V VDD3V V18 VDDHM VSSHM SDCDN VDD33C SD_V33 SDCMD SDDATA1 SDWP SDDATA2 CLED SDDATA3 SDDATA0 SDCLK I/O I I I I I I/O I/O I I O I I I O O I I I I O I/O I/O I I/O O I/O I/O O Description Reserved. Always connect to 3.3V on PCB Core ground Core 1.8V power input External Resistor 330 to Ground UTMI 3.3V power input USB DP USB DM UTMI 3.3V ground 12MHz crystal input 12MHz crystal output UTMI 1.8V input 5 to 3.3 regulator ground 5 to 3.3 regulator 5V input 5 to 3.3 regulator 3.3V output 3.3 to 1.8 regulator 1.8V output IO 3.3V power / 3.3 to 1.8 regulator 3.3V input IO 3.3V ground SD card detect Card power switch 3.3V input Card power switch output SD command SD data 1 SD write protect SD data 2 Card Access LED SD data 3 SD data 0 SD clock 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 EEPDATA REXT VD33P DP DM VS33P XI XO VDDU AGND5V AVDD5V VDD3V V18 VDDHM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 EEPCLK VDD GPI0 MSBS MSINS CLED MS_V33 VDD33C MSCLK MSDATA3 MSDATA2 MSDATA0 MSDATA1 VSSHM Alcor Micro AU6337-GCS 28-PIN SSOP 8 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W Table 3.3 28SSOP (GCS) Pin Descriptions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name EEPDATA REXT VD33P DP DM VS33P XI XO VDDU AGND5V AVDD5V VDD3V V18 VDDHM VSSHM MSDATA1 MSDATA0 MSDATA2 MSDATA3 MSCLK VDD33C MS_V33 CLED MSINS MSBS GPI0 VDD EEPCLK I/O I/O I I I/O I/O I I O I I I O O I I I/O I/O I/O I/O O I O O I O I I O Memory Stick BS EEPROM data Description External Resistor 330 to Ground UTMI 3.3V power input USB DP USB DM UTMI 3.3V ground 12MHz crystal input 12MHz crystal output UTMI 1.8V input 5 to 3.3 regulator ground 5 to 3.3 regulator 5V input 5 to 3.3 regulator 3.3V output 3.3 to 1.8 regulator 1.8V output IO 3.3V power / 3.3 to 1.8 regulator 3.3V input IO 3.3V ground Memory Stick Data1 Memory Stick Data0 Memory Stick Data2 Memory Stick Data3 Memory clock Card power switch 3.3V input Card power switch output Card Access LED Reserved. Always connect to 3.3V on PCB Core 1.8V power input EEPROM clock 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 RAM SD/MMC/MS Control FIFO SD MMC MS 1.8 V Processor ROM Arbitrator 3.3V Voltage Regulator 5V 12MHz XTAL 10 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 VDDHM VDD33C VIN VOUT TSTG PARAMETER Power Supply Input Signal Voltage Output Signal Voltage Storage Temperature RATING -0.3 to VDDH +0.3 -0.3 to 3.6 -0.3 to VDDH +0.3 -40 to 150 UNITS V V V O C 5.2 Recommended Operating Conditions Table 5.2 Recommended Operating Conditions SYMBOL AVDD5V VDDHM VDD33C VDD V18 VIN TOPR PARAMETER 5V Power Supply Power Supply Digital Supply Input Signal Voltage Operating Temperature MIN 4.75 3.0 1.62 0 0 TYP 5.0 3.3 1.8 3.3 MAX 5.0 3.6 1.98 3.6 85 UNITS V V V V O C 5.3 General DC Characteristics Table 5.3 General DC Characteristics SYMBOL IIN IOZ CIN COUT CBID PARAMETER Input current Tri-state leakage current Input capacitance Output capacitance Bi-directional buffer capacitance CONDITIONS No pull-up or pull-down MIN -10 -10 TYP ±1 ±1 2.8 2.8 2.8 MAX 10 10 UNITS µA µA ρF ρF ρF Pad Limit Pad Limit Pad Limit 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 VDDHM VDD33C Vil Vih Vol Voh Rpu Rpd Iin Ioz PARAMETER Power supply Input low voltage CONDITIONS 3.3V I/O Limits MIN 3.0 TYP 3.3 MAX 3.6 0.8 UNIT V V V LVTTL Input high voltage Output low voltage Output high voltage Input pull-up resistance ∣Iol∣=2~16mA ∣Ioh∣=2~16mA PU=high, PD=low 2.4 55 40 -10 -10 75 75 ±1 ±1 110 150 10 10 2.0 0.4 V V KΩ KΩ μA μA Input pull-down resistance PU=low, PD=high Input leakage current Tri-state output leakage current Vin= VDDHM or 0 5.5 USB Transceiver Characteristics Table 5.5 Electrical characteristics Symbol VD33P VDD V18 ICC Parameter Analog supply Voltage Digital supply Voltage Operating supply current Conditions Min. 3.0 1.62 Typ. 3.3 1.8 Max. Unit 3.6 1.98 55 V V mA ICC (susp) High speed operating at 480 MHz In suspend mode, current with 1.5kΩ Suspend supply current pull-up resistor on pin RPU disconnected 120 µA 12 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 Input levels VIL VIH Low-level input voltage High-level input voltage Output levels VOL VOH Low-level output voltage High-level output voltage VDDHM-0.2 Min. Typ. Max. Unit 0.8 2.0 V V 0.2 V V Table 5.7 Static characteristic：Analog I/O pins（DP/DM） Symbol Parameter Conditions Min. Typ. Max. Unit 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 High speed squelch detection threshold High speed disconnection detection threshold Squelch detected No squelch detected Disconnection detected Disconnection not detected Output Levels 150 625 525 VHSDIFF mV VHSCM 500 100 mV mV mV mV mV VHSSQ VHSDSC VHSOI VHSOL VHSOH VCHIRPJ VCHIRPK 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 -10 -10 -360 700 -900 10 10 400 1100 -500 mV mV mV mV mV RDRV 3 6 9 Ω AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W 13 Overall resistance including external resistor Termination VTERM 40.5 45 49.5 VDI VCM VSE VOL VOH 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 Low-level output voltage High-level output voltage 0 2.8 3.6 V V 2.5 V 2.0 0.3 3.6 V V V Table 5.8 Dynamic characteristic：Analog I/O pins（DP/DM） Symbol Parameter Conditions Driver Characteristics High-Speed Mode tHSR tHSF High-speed differential rise time High-speed differential fall time Full-Speed Mode tFR tFF tFRMA 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 Low-Speed Mode tLR Rise time CL=200pF-600pF； 10 to 90﹪of ∣VOH-VOL∣； 75 300 ns 4 4 90 20 20 110 ns ns ％ 500 500 ps ps Min. Typ. Max. Unit VCRS 1.3 2.0 V 14 AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W tLF Fall time Differential rise/fall time matching（tLR / tLF） Output signal crossover voltage High-level output voltage tLRMA VCRS VOH 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 2.8 2.0 3.6 V 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 E1 GAUGE PLANE D D1 SEATING PLANE L L1 0 .2 5 A1 C1 b e A2 A SYMBOLS A A1 A2 c1 D D1 E E1 e b 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 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 MIN -0.05 1.65 0.22 0.09 10.05 7.40 5.00 0.55 0.09 0° UNIT: MM θ° 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 18 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