WED7GXXXIDE33

White Electronic Designs WED7GxxxIDE36 WED7GxxxIDE33 PRELIMINARY* DimmDrive Solid State IDE Flash Module with Power Failure Protection* IDE36 DimmDrive Solid State IDE Flash Module IDE33 FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 144 pin SO-DIMMpackage with IDE pinouts Plug-and-play solid state disk NAND Flash memory technology by SanDisk 3.3 V and 5.0 V power supply operation 16MB – 2GB memory density Low power consumption ECC error correction 512 Byte Sector compatible to IDE HD Drives Supports true IDE mode Commercial temperature range 0°C - +70°C PFP Power Failure Protection Circuit (IDE36) GENERAL DESCRIPTION The DimmDrive WED7GxxxIDE36 is a high performance single chip flash disk IDE module with Power Failure Protection Circuit available in 144 Pin SO-DIMM package. The DimmDrive WED7GxxxIDE33 does not have the additional PFP circuit. The additional circuit provides protection against accidental power loss. This circuit provides an internal power supply and control logic to stop receiving data and complete writing the last sector of data received. This is not intended to be backup for the host system. It will only allow the last sector received to finish writing and no more. It will improve card integrity in applications with a high risk of power failure. The read/write unit is 1 sector (512 bytes) sequential access. The module is based on SanDisk NAND Flash technology and utilizes 128Mb, 256Mb, 512Mb or 1Gb memory components to provide the maximum in module density. The DimmDrive WED7GxxxIDE36/33 utilizes a SanDisk Flash ChipSet controller for the SanDisk memory devices. This interface allows a host computer to issue commands to read or write blocks of memory in the Flash memory array. The intelligence to manage the interface protocols, data storage and retrieval as well as ECC, defect handling and diagnostics are controlled by this device. Automatic power management and clock control is handled by the controller as well. The DimmDrive WED7GxxxIDE36/33 module will have the same functionality and capabilities of an intelligent ATA (IDE) disk drive. Once the device has been configured by the user, it appears to the host as a standard ATA disk drive. The on-board controller is a highly integrated solution designed to handle all intelligent operations, even the rare cases when new defects arise and need to be mapped out or replaced by a spare. The hardware performs the complicated task of ECC detection and correction and will return good data to the host. The controller manages all defects and errors and makes the Flash memory appear POWER BACKUP FEATURES (IDE36) ■ ■ ■ ■ ■ Added PFP circuit built in to preserve card integrity during accidental power loss PFP circuit may not prevent file/data loss if power failure occurs during a long write operation PFP control circuit prevents false operations after power loss Improves card integrity in applications with a high risk of power failure Minimum power backup time of 10ms APPLICATIONS ■ ■ ■ ■ ■ ■ ■ ■ Embedded systems Internet Access Devices Set Top Boxes WEB Browser Routers, Networking WEB phones, car PC, DVD, HPC Medical and Telcom Other applications requiring embedded or solid state storage ■· Point-of-sale * Patent pending White Electronic Designs Corp. reserves the right to change products or specifications without notice. July, 2003 Rev. 0 1 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs as perfect memory to the host. The DimmDrive WED7GxxxIDE36/33 module also provides a more cost effective solution to the traditional hard disk media. The module is perfect for applications requiring upgrade ability to higher densities and for those applications with limited space availability and power consumption requirements. Unlike standard IDE drives, no cables or extra space is WED7GxxxIDE36 WED7GxxxIDE33 PRELIMINARY* required. The module has no moving parts providing significant reduction in power consumption and increasing reliability. Simply insert the module into a standard 144 Pin SO-DIMM socket with IDE pinout and you then have a bootable flash disk. The DimmDrive WED7GxxxIDE36/33 is available with memory densities of 16MB to 2GB. MODULE PINOUT PIN 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 Notes: SIGNAL GND VCC GND NC D7 NC D8 NC D6 NC D9 NC D5 NC D10 NC D4 NC PIN 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 SIGNAL D11 NC D3 NC D12 NC D2 NC D13 NC D1 NC D14 NC D0 NC D15 NC PIN 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 SIGNAL CS0# NC NC CS1# IORD# IOWR# NC NC NC NC NC IRQ CSEL#* RESET IORDY** NC NC NC PIN 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 SIGNAL A2 NC NC DASP# PDIAG# A1 A0 IOCS16# VCC GND NC NC NC NC NC NC NC NC Odd pins are NC (NO CONNECT). “/” indicates signals active low. * low for MASTER, high (open) for SLAVE ** pulled up On the NC pins of the module, additional signals not used in the IDE mode may be present. White Electronic Designs Corp. reserves the right to change products or specifications without notice. July, 2003 Rev. 0 2 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs SIGNAL DESCRIPTION SIGNAL NAME RESET D(15-0) IOWR IORD CSEL IRQ IOCS16 PDIAG A(2-0) CS0 CS1 DASP DIR I I/O I I I O O I/O I I I I/O PIN 100 70,62,54,46,38,30, 22,14,10,18,26,34, 42,50,58,66 84 82 98 96 124 118 110,120,122 74 80 116 WED7GxxxIDE36 WED7GxxxIDE33 PRELIMINARY* IORDY GND Vcc O 102 2,6,128 4,126 DESCRIPTION HOST RESET. Reset signal from the host that is active on power up. HOST DATA. These 16 lines carry the data between the controller and the host. The low 8 lines transfer commands, status and ECC information between the host and the controller. I/O WRITE. This strobe pulse is used to clock data or commands on the host data bus into the controller. The clocking will occur on the negative to positive edge of the signal (trailing edge). I/O READ. This is a read strobe generated by the host. This signal gates data or status on the host bus and strobes the data from the controller into the host on the low to high transition (trailing edge). This internally pulled up signal is used to configure this device as a Master or a Slave. When this pin is grounded by the host, this device is configured as a Master. When this pin is high (or open), this device is configured as a Slave. INTERRUPT REQUEST. This is an interrupt request from the controller to the host, asking for service. The output of this signal is tri-stated when the interrupts are disabled by the host. I/O SELECT 16. This open drain output is asserted low by the controller to indicate to the host the current cycle is a16 bit word data transfer. PASS DIAGNOSTIC. This bi-directional open drain signal is asserted by the slave after anExecute Diagnostic command to indicate to the master it has passed its diagnostics. HOST ADDRESS. These address lines are used to select the registers within the controller task file. HOST CHIP SELECT 0. This is a chip select signal that is used to select the controller task file. HOST CHIP SELECT 1. This is a chip select signal that is used to select the control and diagnostic register. DISK ACTIVE/SLAVE PRESENT. This open drain output signal is asserted low any time the drive is active. In a master/slave configuration, this signal is used by the slave to inform the master a slave is present. This is an optional signal that is negated when the drive is not ready to respond to a data transfer request. For the module this signal is not used, the pin is pulled up. As long as the host obeys PIO mode 0 or 4 timing, the module is guaranteed to respond properly. GROUND. POWER (3.3V – 5V) White Electronic Designs Corp. reserves the right to change products or specifications without notice. July, 2003 Rev. 0 3 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs FIG. 1 BLOCK DIAGRAM WED7GxxxIDE36 WED7GxxxIDE33 PRELIMINARY* VCC Power Failure Protection Circuit (IDE36) Internal VCC Internal VCC 16 n 2 Control SanDisk Controller Control AND Flash D15 – D8 Data D7 – D0 White Electronic Designs Corp. reserves the right to change products or specifications without notice. July, 2003 Rev. 0 4 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs POWER BACKUP TIMING Shown in the following two figures are the differences in operation between the WED7GxxxIDE33 module, and the WED7GxxxIDE36 module with Power Failure Protection Circuit. Figure 1 shows how a sector is written to a NAND Flash. The entire sector is received and then is written at one time. The RDY/BSY line stays busy until proper writing of the data is ensured. If power loss occurs before the WED7GxxxIDE36 WED7GxxxIDE33 PRELIMINARY* RDY/BSY line becomes ready again, the module may have correctly written the data, but this is not ensured. Therefore the data may be corrupted. Figure 2 shows the protected module. The power is again lost after the second sector (Sector n+1) is received, but the internal backup power allows the sector to be properly written, and the card completes the write sector operation. FIG. 2 POWER LOSS WITHOUT POWER FAILURE PROTECTION CIRCUIT RDY/BSY Device in Write Process/Busy Data Written/Device Ready Sector Write Process Power Loss Data Transmitted Sector n Sector n+1 Sector n+2 External VCC Internal VCC Data Received Sector n Sector n+1 Data Written n n+1 Possibly Corrupted Sector Note: Sector Blocks in these diagrams do not represent a difference with size of data written, between the data received and the data written. This represents the shorter time to write the data than to transmit it. White Electronic Designs Corp. reserves the right to change products or specifications without notice. July, 2003 Rev. 0 5 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs WED7GxxxIDE36 WED7GxxxIDE33 PRELIMINARY* FIG. 2: POWER LOSS WITH POWER FAILURE PROTECTION CIRCUIT Power Loss Data Transmitted Sector n Sector n+1 Sector n+2 External VCC Valin VCC Threshold Internal VCC Data Received Sector n Sector n+1 Data Written n n+1 tSW Note: tBACKUP > tSW tBACKUP ENVIRONMENTAL SPECIFICATIONS Temperature Humidity Acoustic Noise Altitude (relative to sea level) Operating Non-Operating Operating Non-Operating Operating Non-Operating 0° C to 70° C -25° C to 85° C 8% to 95 %, non-condensing 8% to 95 %, non-condensing 0 dB 80,000 feet maximum POWER REQUIREMENTS 3.3 V DC Input Voltage (VCC) 100 mV max. ripple (p-p) See Notes Sleep Reading Writing Read/Write Peak 3.3V +/- 5% 200 µA 21 mA 24 mA 150 mA/50 µs 5V 5V +/- 10% 500 µA 34 mA 34 mA 150 mA/50 µs Notes: All values quoted are typical at ambient temperatures and nominal supply voltage unless otherwise stated. Sleep mode current is specified under the condition that all inputs are at static CMOS levels and in a “Not Busy” operating state. White Electronic Designs Corp. reserves the right to change products or specifications without notice. July, 2003 Rev. 0 6 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs RELIABILITY AND MAINTENANCE MTBF (@ 25° C) Preventive Maitenance Data Reliability Endurance (commercial temp.) WED7GxxxIDE36 WED7GxxxIDE33 PRELIMINARY* > 1,000,000 hours None