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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 (c) 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 characteristicDigital pin .....................................13 Table 5.7 Static characteristicAnalog I/O pinsDP/DM..........13 Table 5.8 Dynamic characteristicAnalog I/O pinsDP/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
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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
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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
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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
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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
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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
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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
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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
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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
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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
A A F F F
Pad Limit Pad Limit Pad Limit
AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W
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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 K K A A
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 1.5k Suspend supply current pull-up resistor on pin RPU disconnected
120
A
12
AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W
Table 5.6 Static characteristicDigital 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 characteristicAnalog I/O pinsDP/DM Symbol Parameter Conditions Min. Typ. Max. Unit
USB2.0 TransceiverHS Input Levelsdifferential receiver VIDP-VIDM 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
AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W
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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 TransceiverFS/LS Input Levelsdifferential receiver Differential input VIDP-VIDM 0.2 sensitivity Differential common 0.8 mode voltage Input Levelssingle-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 characteristicAnalog I/O pinsDP/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=50pF10 to 90 ofVOH-VOL CL=50pF90 to 10 Fall time ofVOH-VOL Excluding the first Differential rise/fall time transition from idle matchingtFR / 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 90of 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 matchingtLR / tLF Output signal crossover voltage High-level output voltage
tLRMA
VCRS VOH
CL=200pF-600pF 90 to 10of 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
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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: 3.3V0.3V 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
0.25
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
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
1. 2.
AU6337 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.00W
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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
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
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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
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