Data Sheet: uDiskOnChip (uDOC) - Digi-Key
Contents
1. uDiskOnChip is offered in a horizontal version with two available configurations and in a Low Profile version as described below In addition an adapter is available described in Section 5 3 6 to enable customers to evaluate uDiskOnChip using an external USB port 5 3 1 Horizontal Single Connector In the single connector configuration uDiskOnChip has a single 2x5 electrical connector plus a mounting hole as shown in Figure 4 EEH ieee Ete AE CS Sege 8 m e Bet ec 3 r N ah AC P E i E Ts Figure 4 uDiskOnChip Horizontal Version with Single Connector 5 3 2 Horizontal Dual Connector In the dual connector configuration uDiskOnChip has a 2x5 electrical connector along with a 1x5 mechanical connector for mounting stability as shown in Figure 5 Figure 5 uDiskOnChip Horizontal Version with Dual Connector Configuration 14 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems eve mmm Flash Disk Pioneers DiskOnChip 5 3 3 Low Profile Single Connector In the low profile single connector configuration uDiskOnChip has a single low profile 2x5 electrical connector plus a mounting hole Cf f Selen A TL yy gege ai amn yy flay 29 WVittmm al Aa b WW wi am D K ci i ki P ka ect ri ZZ E z RK L i ER d Es Ze E Side View ka UI SITTI I Bottom View Top View2. ER M Systems eum Flash Disk Pioneers 2 2 2X5 Electrical Interface ove DiskOnChip uDiskOnChip is available in a horizontal version with a 2x5 pin electrical interface uDiskOnChip provides two configurations a 2x5 electrical interface plus mounting hole and a 2x5 electrical interface plus 1x5 mechanical interface 2 2 1 Standard On Board USB Header Table 1 lists the host interface on board header pins and signals Table 1 Host Interface 2x5 On Board Header Pin Signal USB1 Data USB1 Data 3 ZZ _ 2 2 2 UuDiskOnChip Connector Pin Signal 4 USB2 Data NC future option in the Low Profile configuration Write Protection signal Figure illustrates the uDiskOnChip 2x5 device interface connector NC 5VDC input NC USB1 Data NC e USB1 Data NC H GND NC o KEY blocked uDOC 2x5 Bottom View Figure 1 uDiskOnChip 2x5 Connector Pinout 7 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev Flash Disk Pioneers DiskOnChip 3 THEORY OF OPERATION 3 1 Block Diagram The uDiskOnChip controller enables the highest performance for USB 2 0 coupled with the best security and reliability available The controller s firmware inherently supports multi vendor flash components to provide flexibility and guarantee delivery to our customers As with other products based on M Systems technology the uDiskOnChip controller contains M Systems
3. An adapter is available to assist customers in evaluating uDiskOnChip The adapter enables inserting uDiskOnChip in an external desktop or laptop USB port Figure 10 uDiskOnChip 2x5 Horizontal Version Single Dual Connector Top View 17 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LE M Systems ebb Flash Disk Pioneers DiskOnChip 5 4 Electrical Specifications 5 4 1 Absolute Maximum Ratings Table 4 Absolute Maximum Ratings Parameter Ambient Operating Temperature Range Commercial Ambient Operating Temperature Range Extended Ta 40 85 C Power Supply Voltage Relative to Ground Vw 4 6 Vv Voltage level on D D Relative to Ground 3 V data 1 4 6 5 4 2 DC Characteristics Table 5 DC Characteristics for Full Speed Operation Ta 25 Mons 3 3v Vss OV Parameter Symbol Test Conditions Min Typ Max ua eC USB Signals Supply Voltage Vous Supply Current RMS Operating VBUS 5 0v 87 100 mA Suspend S a rs Max Current Consumption Peak Value 105 Input Levels USB Signals D D Low V High 2 0 V Output Voltage USB Signals D D Low H of 1 5 KQ to 3 6V 0 0 4 V High R of 15kQ to GND 2 6 3 6 V Output Signal Crossover Voltage USB Signals D D 1 3 2 0 V 18 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LE M Systems ebb Flash Disk Pioneers DiskOnChip Table 6 DC Characteristics for High Speed Operation Ta 25 TC Vpp 3 3v
4. patented USB device interface which is compatible with USB 2 0 The controller also has a high speed 32 bit RISC microcontroller with Idle and Deep Power Down modes for power management The uDiskOnChip controller architecture is illustrated in Figure 2 Clock Mechanism I USB Protocol USB Connector SS Regulator ee E L uDiskOnChip EE Figure 2 uDiskOnChip Controller Block Diagram Voltage 8 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L DER M Systems ove Flash Disk Pioneers DiskOnChip 3 2 System Architecture 3 2 1 Controller Internal Components ARM7TDMI CPU which serves as the hardware infrastructure for the M Systems flash controller algorithm M Systems Flash Controller the heart of the system which is responsible for the flash handling algorithm flash timing and Error Detection and Correction USB PHY and Digital Controller embedded in the uDiskOnChip controller which interfaces with all external interactions via an external USB connector Crypto Core the hardware engine that provides security functions and services to be used by the controller SRAM for running the controller program faster and more efficiently ROM for running the boot code and additional service program Clock Mechanism which drives all clock sources some from the crystal oscillator
5. Boot write protected with RSA Fixed OS Protection Enhanced Write Filter Partition 2 Storage write protected with RSA Partitions 3 6 Storage read write 21 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev Flash Disk Pioneers DiskOnChip 7 ORDERING INFORMATION 7 1 uDiskOnChip MD16x5 Dxxxx T P a A A NN Device Code Density Mechanical Support Environmental RoHS Support 1665 uDiskOnChip Horizontal D MBytes Blank Mounting hole Blank Commercial Blank Standard 1675 uDiskOnChip Low Profile xxxx Value J 1x5 mechanical connector X Extended P Lead free Figure 11 Ordering Information Structure Table 8 uDiskOnChip Form Factors and Ordering Information Configuration Temperature Range Capacity MB Ordering Information MD1665 D32 64 MD1665 D64 MD1665 D128 Commercial MD1665 D256 MD1665 D512 1024 MD1665 D1024 Horizontal with single connector 2048 MD1665 D2048 and mounting hole 32 MD1665 D32 X Extended MD1665 D2048 X Commercial Horizontal with single connector and mounting hole PB Free Version 128 MD1665 D128 X P Extended 256 912 MD1665 D512 X P 1024 MD1665 D1024 X P 2048 MD1665 D2048 X P 22 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev Flash Disk Pioneers DiskOnChip 128 Commercial 256 512 1024 MD1665 D1024 J 2048 MD1665 D2048 J Horizontal with dual connector 64 MD1665 D64 J X 128 Extended
6. Vss OV Parame Symbol Test Conditions Min Typ Max Unit USB Signals amis vws o eosa v Supply Current RMS Operating VBUS 5 0v 100 120 Suspend bad lt 500 lt 500 i Max Current Consumption Peak Value a Input Levels USB Signals D D Low High Output Voltage USB Signals D D Low R of 1 5 KQ to 3 6V High R of 15 kQ to GND Output Signal Crossover Voltage USB Signals D D 19 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev s Flash Disk Pioneers DiskOnChip 6 SOFTWARE DESCRIPTION uDiskOnChip 1s available in five software configurations three under Microsoft Windows XP Embedded and two under Linux 6 1 Microsoft Windows XP Embedded Modes 6 1 1 Windows XP Embedded Storage This is the uDiskOnChip default software mode In Windows XP Embedded Storage mode uDiskOnChip is recognized as removable memory in the system and is used as additional drive without any software integration process Drive partitioning is not available in Windows XP Embedded Storage mode 6 1 2 Windows XP Embedded Boot In Windows XP Embedded Boot mode uDiskOnChip is recognized as a hard drive in the system The system can boot from uDiskOnChip this mode eliminating the need for additional components In Windows XP Embedded Boot mode uDiskOnChip can be partitioned into up to four drives e First partition Stores the Windows XP Embedded image e Other partitions Store data and
7. Microsoft EWF 20 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LE M Systems ebb s Flash Disk Pioneers DiskOnChip It is recommended to partition uDiskOnChip as follows when using Windows XP Embedded Secure Boot mode e Secure partition I This drive stores the Windows XP Embedded operating system image e Secure partition II optional This drive can function as a secure storage area for data that should not be accessed by unauthorized users e Standard partition Up to four standard drives that are not write protected 6 2 Linux Modes 6 2 1 Linux Storage This is the uDiskOnChip default software mode In Linux Storage mode uDiskOnChip is used as additional drive without any software integration process In Linux Storage mode uDiskOnChip can be partitioned into up to four drives 6 2 2 Linux Boot Please contact M Systems technical support department to set uDiskOnChip and the host to work in Linux Boot mode M Systems will provide a user manual for use in configuring uDiskOnChip to function as a system boot device In Linux Boot mode uDiskOnChip can be partitioned into up to four drives Table 7 uDiskOnChip Software Modes WindowsXPEmbedded XP Embedded Um O Mode Partition ma ee poa Partition Ee CR Storage Storage Removable Storage up to four partitions up to four partitions Boot Partition 1 Boot Fixed Boot and storage up to four Partitions 2 4 Storage partitions Partition 1
8. as in dynamic areas thereby applying wear leveling to the entire media 4 4 Power Failure Management TrueFFS uses algorithms based on erase after write instead of erase before write to ensure data integrity during normal operation and in the event of a power failure Used areas are reclaimed for erasing and writing the flash management information into them only after an operation is complete This procedure serves as a check on data integrity The erase after write algorithm is also used to update and store mapping information on the flash memory This keeps the mapping information coherent even during power failures The only mapping information held in RAM is a table pointing to the location of the actual mapping information This table is reconstructed during power up or after reset from the information stored in the flash memory 11 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev s Flash Disk Pioneers DiskOnChip To prevent data from being lost or corrupted TrueFFS uses the following mechanisms e When writing copying or erasing the flash device the data format remains valid at all intermediate stages Previous data 1s never erased until the operation has been completed and the new data has been verified e A data sector cannot exist in a partially written state The operation is either successfully completed in which case the new sector contents are valid or the operation has not yet been completed or ha
9. of the entire flash To overcome this inherent deficiency TrueFFS uses M Systems patented wear leveling algorithm This wear leveling algorithm ensures that consecutive writes of a specific sector are not written physically to the same page in the flash This spreads flash media usage evenly across all pages thereby maximizing flash lifetime M Systems wear leveling mechanism provides more than 5 million write erase cycles for reliable data storage over an extended period Dynamic Wear Leveling TrueFFS uses statistical allocation to perform dynamic wear leveling on newly written data This minimizes the number of erase cycles per block As a block erase 1s the most time consuming operation dynamic wear leveling has a major impact on overall performance This impact cannot be noticed during the first write to flash since there 1s no need to erase blocks beforehand but becomes more and more noticeable as the flash media becomes full Static Wear Leveling Areas on the flash media may contain static files characterized by blocks of data that remain unchanged for very long periods of time or even for the whole device lifetime If wear leveling were only applied on newly written pages static areas would never be cycled This limited application of wear leveling would lower life expectancy significantly in cases where flash memory contains large static areas To overcome this problem TrueFFS forces data transfer in static areas as well
10. or applications To set uDiskOnChip and the host to work in Windows XP Embedded Boot mode please contact M Systems technical support M Systems will provide a software package including all required user manuals for use in configuring uDiskOnChip to function in Windows XP Embedded Boot mode and function as the system boot device In Windows XP Embedded Boot mode the user can read from or write to all partitions 6 1 3 Windows XP Embedded Secure Boot Windows XP Embedded Secure Boot mode provides uDiskOnChip customers with the advantage of M Systems security capabilities which implement unparalleled security algorithms in hardware using SuperMAP technology M Systems security technology is supported by over 15 patents and field tested in tens of millions of smartcards Some customization may be required to set uDiskOnChip and the host to work in Windows XP Embedded Secure Boot mode M Systems technical support department can provide a software package including all required user manuals for use in configuring uDiskOnChip to function as a secure system boot device In Windows XP Embedded Secure Boot mode uDiskOnChip can be partitioned into up to six drives with a maximum of two secure drives and four standard drives The secure drives are write protected using Public Key Infrastructure PKI for key exchange and authentication implemented by an RSA 64 byte key In addition uDiskOnChip supports the Enhanced Write Filter enabling
11. 256 912 MD1665 D512 J X 1024 MD1665 D1024 J X 2048 MD1665 D2048 J X MD1675 D32 P MD1675 D64 P 128 MD1675 D128 P Commercial 256 MD1675 D256 P MD1675 D512 P 1024 MD1675 D1024 P Low Profile with single connector 2048 MD1675 D2048 P and mounting hole PB Free version MD1675 D32 X P MD1675 D64 X P MD1675 D128 X P Extended MD1675 D256 X P MD1675 D512 X P 1024 MD1675 D1024 X P 2048 MD1675 D2048 X P 7 2 uDiskOnChip to USB Adapter Ordering information for the uDiskOnChip to USB adapter UDOC 2X5 ADPT 23 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L bh M Systems emus Flash Disk Pioneers How TO CONTACT US USA M Systems Inc 555 North Mathilda Avenue Suite 220 Sunnyvale CA 94085 Phone 1 408 470 4440 Fax 1 408 470 4470 Japan M Systems Japan Inc Asahi Seimei Gotanda Bldg 3F 5 25 16 Higashi Gotanda Shinagawa ku Tokyo 141 0022 Phone 81 3 5423 8101 Fax 8 1 3 5423 8102 Taiwan M Systems Asia Ltd 14 F No 6 Sec 3 Minquan East Road Taipei Taiwan 104 Tel 886 2 25 15 2522 Fax 886 2 25 15 2295 NN DiskOnChip China M Systems China Ltd Room 121 122 Bldg 2 International Commerce amp Exhibition Ctr Hong Hua Rd Futian Free Trade Zone Shenzhen China Phone 86 755 8348 5218 Fax 86 755 8348 5418 Europe M Systems Ltd 7 Atir Yeda St Kfar Saba 44425 Israel Tel 972 9 764 5000 Fax 972 3 548 8666 Internet Www in systems com General Inform
12. ER M Systems eum Flash Disk Pioneers NN DiskOnChip uDIskOnChio uDOC Modular Flash Disk with USB 2 0 Interface Highlights The performance of embedded systems in markets such as Single Board Computers SBCs thin clients consumer electronics Point Of Sale POS and telecom is limited by IDE based flash disks A combination of higher capacity higher performance devices is needed to support larger OSs heavier GUI applications a wide variety of installed applications and local data storage uDiskOnChip uDOC answers these needs by merging M Systems expertise in three worlds the USB 2 0 high speed interface the DiskOnChip industry standard flash for embedded systems and the SuperMAP cryptographic engine uDiskOnChip features Exceptional read write and erase performance Built in proprietary TrueFFS technology for full hard disk emulation high data reliability and maximum flash lifetime Data integrity with Error Detection Code Error Correction Code EDC ECC based on a combination of BCH and Hamming algorithms Support for major embedded OSs including Windows XP Embedded and Linux Protection and Security Features m SuperMAP cryptographic engine to enable protected partitions m Data protected in hardware with digital signature RSA with 64 byte key 1 Data Sheet Rev 2 2 Data Sheet July 2005 E D i zmn E j Ea EAT Sue ee Performance USB 2 0 High Speed Sustain
13. Figure 6 uDiskOnChip Horizontal Version with Single Connector 15 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev Flash Disk Pioneers DiskOnChip 5 3 4 LED Functionality e LED flashing slowly uDiskOnChip is connected and inactive e LED flashing rapidly uDiskOnChip is transmitting receiving data or is engaged in the identification process e Default LED colors o Red USB high speed mode 10 MB sec write 20 MB sec read o Green USB full speed mode 0 85 MB sec write 1 MB sec read 5 3 5 Dimensions uDiskOnChip mechanical dimensions are in mm with a general tolerance of 0 25 mm Horizontal Configuration Max component s helght on TOP side 16mm Max component s helght on BOTTOM side cht Mounting Hole Figure 7 uDiskOnChip 2x5 Horizontal Version Single Dual Connector Top View El COMNECTOR Ix PINS PID NOT CONNECTED WM Cl 28mm CONNECTOR ex3 PINS JUD Figure 8 uDiskOnChip 2x5 Horizontal Version Single Dual Connector Bottom View 16 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev Flash Disk Pioneers DiskOnChip Low Profile Configuration TOP VIEW SIDE VIEW Max component s helght on BOTTOM side lmm Max component s height on TOP side Lamm Female connector ds cmm with pln 9 blocked for USE data La TEL p m SMM LUS Oe2 SM D US P TR or equivalents Figure 9 uDiskOnChip 2x5 Low Profile Version 5 3 6 uDiskOnChip to USB Adapter
14. and others from the PHY PLL Reset Mechanism which restores the reset states of the system and forces the controller to perform the boot procedure The Reset state causes all cores to move to Reset mode Timers and Counters including the device timer watchdog and general purpose timer counter channels 3 2 2 Controller External Components NAND Flash for data storage Crystal Oscillator 12 000 MHz the main clock source 3 3V Voltage Regulator to supply a stable power supply to the circuit and for accurate and reliable operation LEDs for indicating controller activity uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev s Flash Disk Pioneers DiskOnChip 4 TRUEFFS TECHNOLOGY 4 1 Overview M Systems patented TrueFFS technology was designed to maximize the benefits of flash memory while overcoming inherent flash limitations that would otherwise reduce its performance reliability and lifetime TrueFFS emulates a hard disk making flash management completely transparent to the OS TrueFFS which has become an industry standard for reliability is implemented in uDiskOnChip therefore no integration is required Application OS File System uDiskOnChip TrueFrs Figure 3 TrueFFS Implemented in uDiskOnChip Firmware TrueFFS technology features e Flash file system management e Bad block management e Dynamic virtual mapping e Dynamic and static wear leveling e Power failure
15. ation info m systems com Sales and Technical Information techsupport m systems com This document is for information use only and is subject to change without prior notice M Systems Flash Disk Pioneers Ltd assumes no responsibility for any errors that may appear in this document No part of this document may be reproduced transmitted transcribed stored in a retrievable manner 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 consent of M Systems M Systems products are not warranted to operate without failure Accordingly in any use of the Product in life support systems or other applications where failure could cause injury or loss of life the Product should only be incorporated in systems designed with appropriate and sufficient redundancy or backup features Contact your local M Systems sales office or distributor or visit our website at www m sys com to obtain the latest specifications before placing your order 2005 M Systems Flash Disk Pioneers Ltd All rights reserved M Systems DiskOnChip DiskOnChip Millennium DiskOnKey DiskOnKey MyKey FFD Fly By iDiskOnChip iDOC mDiskOnChip mDOC MegaSIM Mobile DiskOnChip SuperMAP TrueFFS uDiskOnChip uDOC and Xkey are trademarks or registered trademarks of M Systems Flash Disk Pioneers Ltd Other product names or service marks mentioned herein may b
16. cccccseeeeeeeeeeeeeeaeeeeeseeeeesseeeeeeseaeeeesaeeeeessenseesaeeeeesaees 14 5 3 2 Horizontal Dual Connector cee cccceecccecseeeeeeeeeeeeeaeeeeeseeeeeeseeeeeeseaeeeesseeeeesaeeeeesaeneeeesaees 14 Doo Low Promle Single Connect EE 15 E SR RA CACTI AMY EE 16 5 3 9 Ri e E 16 5 3 6 uDiskOnChip to USB Adapter cc cccccccsecececeeeeeeeseeeeeesseeeeeseeeeeeseaeeeesseeeesseeseeeeeaeeeesaees 17 5 4 Electrical Specifications EE 18 94 1 ASau Wax IMUM RAINS EE 18 DAZ DC EIERE eessen O E E EE EE 18 3 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L eve DER M Systems m Flash Disk Pioneers DiskOnChip 6 S0NWare DCS CHI LOUD ois occ occas tds aA AaS E aAA ance alee cedtestyecsctexpeuetearnetess 20 6 1 Microsoft Windows XP Embedded Modes n nnnnnnnannnnnnnnnnnnnnsnnrsnnrsnrrsrnrsnnrsrrrsrrrsrrrnnee gt 20 6 1 1 Windows XP Embedded Storage 0 0nnn00nnn00annosanenornnnnsnnnerrnrnnnnnrrnnrensnrrrrsnrnrsnnerrnnrersnnees 20 6 1 2 Windows XP Embedded Boot 20 6 1 3 Windows XP Embedded Secure Boot 20 SSC LME ele lt n an eee ee eee ee ee ee 21 6 2 1 WLI SUR AC EE 21 o LN ee EE 21 7 ee de Le Nu edu E de BE 22 TA IR IC En GID a an a A E E E EO 22 1 2 IRC A ln L le Die DEN e Ee TEE 23 HOW tO CONAC dE 24 4 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L DER M Systems ove Flash Disk Pioneers DiskOnChip 1 INTRODUCTION This data sheet includes the following sections Section 1 Section 2 Secti
17. e trademarks or registered trademarks of their respective owners and are hereby acknowledged All specifications are subject to change without prior notice 24 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L
18. ed Read 20 MByte sec 10 MByte sec m USB 2 0 480 Mbit sec high speed USB compatible m USB 1 1 O 12 Mbit sec full speed USB compatible O Sustained Read rate 1 MB sec O Sustained Write rate 0 85 MB sec m Flash Interleave and Fly By algorithm for improved performance Data Reliability m 4 bit Error Detection Code Error Correction Code EDC ECC based on a patented combination of BCH and Hamming code algorithms Sustained Write Guaranteed data integrity even after power loss Transparent bad block management Dynamic and static wear leveling Wear leveling algorithm that provides more than 5 million write erase cycles for reliable data storage over an extended period 94 SR 003 01 8L DER M Systems meus Flash Disk Pioneers Operating Environment m Any BIOS supporting boot from USB Mass Storage Class devices m Can be used for boot and or storage on the following operating systems D Windows XP Embedded D Windows CE D Windows Embedded for Point of Service WEPOS D Linux O VxWorks storage only Power Requirements m Power supply 5VDC 10 Power consumption Vcc 5V O Read Write 100 mA typ O Suspend lt 500 uA Packaging Horizontal alignment with mounting hole Horizontal alignment with 1x5 mechanical connector m Low profile with mounting hole uDiskOnChip Data Sheet Rev 2 2 ove DiskOnChip RoHS Support m ROHS version available all configurations Environmental Operatin
19. enables read write operations that are identical to a standard sector based hard disk In addition TrueFFS employs patented methods such as virtual mapping dynamic and static wear leveling and automatic block management to ensure high data reliability and to maximize flash life expectancy Data integrity is guaranteed through an embedded 4 bit error detection and error correction code algorithm that automatically detects and corrects data errors The EDC ECC algorithm is based on a combination of Hamming and BCH code uDiskOnChip provides data protection in hardware utilizing RSA with a 64 byte key This feature is enabled by the SuperMAP cryptographic engine developed by M Systems Fortress division and used successfully in thousands of smartcards uDiskOnChip is based on Single Level Cell SLC NAND flash technology This technology is superior in its data storage characteristics featuring the industry s highest performance Additionally NAND flash technology is known for its high density and small die size with the related cost and real estate benefits Multi Level Cell MLC NAND is planned for use in the next generation product enabling further cost benefits uDiskOnChip is available in capacities ranging from 32MB to 2GB with a fast and simple upgrade path It fits easily into any platform with an embedded USB connector and can be secured firmly into place for enhanced ruggedness 6 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L
20. es device life tests failure analysis of earlier equipment device physics and field returns M Systems uses following methods to predict reliability e Telcordia Special Report SR 332 Reliability Prediction Procedure for Electronic Equipment RPP e British Telecom Industry HRD5 Handbook of Reliability Data for Electronic Components used in Telecommunication System Table 3 summarizes the MTBF prediction results for various uDiskOnChip configurations The analysis was performed using a RAM Commander failure rate prediction e Failure Rate The total number of failures within an item population divided by the total number of life units expended by that population during a particular measurement interval under stated condition 13 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ove s Flash Disk Pioneers DiskOnChip e Mean Time Between Failures MTBF A basic measure of reliability for repairable items The mean number of life units during which all parts of the item perform within their specified limits during a particular measurement interval under stated conditions Table 3 uDiskOnChip MTBF Failure Rate per Product Condition MTBF Hours Million Hours 64 128MB Telcordia SR 332 GB 25 C 4 667 755 0 214 256 512 1024 2048MB Telcordia SR 332 GB 25 C 4 130 674 64 128MB Telcordia SR 332 GF 35 C 1 667 189 0 599 256 512 1024 2048MB Telcordia SR 332 GF 35 C 1 360 977 0 735 5 3 Mechanical
21. g temperature D Commercial 0 C to 70 C O Extended 40 C to 85 C m Storage temperature 55 C to 95 C Capacities m 32MB 2GB Applications Embedded systems Single board computers Extended PCs Thin clients network computers Set top boxes Medical equipment Gaming 94 SR 003 01 8L N E M Systems NN m Flash Disk Pioneers DiskOnChip TABLE OF CONTENTS faligo e de WEE 5 2 Geet ei e Cl ET 6 Se We lf Lei ARTE e 6 2 2 2x5 Electrical Interface E 7 2 2 1 Standard On Board USB Header 7 2 2 2 UDISKONCHIP Connechor ccc ccecccceecceceeeeeceeeecaeecesaeeceseeeeeseeeeeseeeeeseeeesseeessueeesaueeesaeeesees 7 3 Theory Ol ODCl atl OWN E 8 6 a ele RTE e eu WE 8 32 SYVSTSMUAAT ene 9 3 2 1 Controller Internal Components ccc cccccecccceeeeceeeeceeeeeceeeececesseecesseeessaeeesegeeesaeeeseaeeees 9 3 2 2 Controller External Components n0nneannnnannnennnnnnnnernnnnnnrnnnsnrrrnnrrsnrrnnrrnrnrrnnrronrrenrrnnrrnnne 9 4A TrueFFS KC lee e VE 10 z Zu EE e E 10 42 Bad Bl ck Management aedade saves cte tesa cased a i E era 10 Ad WearLevVelNg E 11 4 4 Power Failure Management 11 4 5 Err r EENHEETEN aa aiaa aaiae 12 S SO le le EE 13 9 1 Standards COMP En er 13 SSC e 108 a 02 Eee ee eee en eee ene meee een ner eet ee ee ee eee ee 13 SLA TEMPE AEM ege ee 13 522 SMOGCK AMG VII QUO EE 13 5 2 3 Mean Time Between Failures MIBE 13 D er En Ve EE 14 5 3 1 Horizontal Single Connector 00 0 cee
22. management e Implementation of MLC tailored EDC ECC e Performance optimization 4 2 Bad Block Management Since NAND flash is an imperfect storage media it can contain bad blocks that cannot be used for storage because of their high error rates TrueFFS automatically detects and maps out bad blocks upon system initialization ensuring that they are not used for storage This management process is completely transparent to the user who is unaware of the existence and location of bad blocks while remaining confident of the integrity of data stored 10 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev s Flash Disk Pioneers DiskOnChip 4 3 Wear Leveling Flash memory can be erased a limited number of times This number is called the erase cycle limit or write endurance limit and is defined by the flash array vendor The erase cycle limit applies to each individual erase block in the flash device In uDiskOnChip the erase cycle limit of the flash is 100 000 erase cycles This means that after approximately 100 000 erase cycles the erase block begins to generate storage errors at a rate significantly higher than the error rate that 1s typical to the flash In a typical application and especially if a file system is used specific pages are constantly updated e g the page s that contain the FAT registry etc Without any special handling these pages would wear out more rapidly than other pages reducing the lifetime
23. on 3 Section 4 Section 5 Section 6 Section 7 Overview of data sheet contents Product overview including brief product description interface diagram and header connector descriptions Theory of operation for the major building blocks Description of TrueFFS technology Environmental mechanical and electrical specifications Description of the available software components Ordering information for uDiskOnChip For additional information on M Systems flash disk products please contact one of the offices listed on the back page uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev s Flash Disk Pioneers DiskOnChip 2 PRODUCT OVERVIEW 2 1 Product Description uDiskOnChip uDOC is the ideal data storage device in any USB capable system capitalizing on M Systems expertise in three fields The USB interface based on its USB flash drive flash drives for the embedded market based on the DiskOnChip product line and security based on patented algorithms uDiskOnChip offers the speed and ease of the USB interface uDiskOnChip can work with any operating system that supports USB Mass Storage Class devices such as Windows XP Embedded Windows CE Linux and others M Systems patented TrueFFS flash management technology which fully emulates a hard disk in DiskOnChip products is embedded in the uDiskOnChip firmware to streamline integration efforts This transparent file system management
24. s failed in which case the old sector contents remain valid 4 5 Error Detection Correction TrueFFS implements a unique MLC tailored Error Correction Code ECC algorithm to ensure data reliability The advanced algorithm provides 4 bit Error Detection Code Error Correction Code EDC ECC based on a patented combination of BCH and Hamming code algorithms 12 uDiskOnChip Data Sheet Rev 2 2 94 SR 003 01 8L LEI M Systems ev s Flash Disk Pioneers DiskOnChip 5 SPECIFICATIONS 5 1 Standards Compliance uDiskOnChip complies with CE requirements and FCC standards and has been approved by the UL organization uDiskOnChip is also available in lead free versions all configurations which comply with the RoHS directive 5 2 Environmental 5 2 1 Temperature Operating Commercial 0 C to 70 C Extended 40 C to 85 C Storage Extended 55 C to 95 C 5 2 2 Shock and Vibration Table 2 Shock Vibration Testing for uDiskOnChip Reliability Test Test Conditions Reference Standards 10 Hz to 500 Hz 5 g 3 axes 30 minutes IEC 68 2 6 Mechanical Shock Duration 11 ms 50 g 3 axes 18 times IEC 68 2 27 5 2 3 Mean Time Between Failures MTBF The reliability figure of merit most often used for electronic equipment is Mean Time Between Failures MTBF M Systems estimates MTBF using a prediction methodology based on reliability data for the individual components in M Systems products Component data comes from several sourc
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