LCC USB SSD (DUL)

Info Box Applies to DUL

Please note that information here provided are preliminary and subject to change.

Introduction

DUL belongs to the Dave Solid State Disk (SSD) product family. These devices implements SSD solutions that are conceived for use in embedded systems operating in harsh environments where no compromises are tolerated about relibility. On the other hand, they are designed in order to ease the use from the system integrator's standpoint, in terms of hardware issues and software compatibility. These characteritcs make them suited for use in combination with a wide range of host devices, from low-cost microcontrollers to high-end embedded processors.

SSD product family is composed by several subfamilies. Two major factors distinguish subfamilies: mechanical outline and host interface. DUL comes in Leadless Chip Carrier (LCC) package. Host interface is USB. Non-volatile storage is based on NAND flash tecnology.

Reliability

This section highlights product characteristics and features that have been adopted at design stage in order to push intrinsic reliability to the maximum possible extent.

• From the mechanical standpoint, adoption of LCC outline guarantees a solid and firm mating with carrier board hosting DUL making this product particularly suited for environments where mechanical vibrations are an issue.
• About power supply, two inputs are provided:
  • VIN: this is main power supply input. See Pinout section for more information about voltage range.
  • VIN_AUX (available on request): this input is provided to implement a second power supply unit on carrier board (for example based on supercap or battery) that prevents power cut in case main supply experiences a glitch or a power cut. This option is a powerful weapon to face unpredictable power loss and to guarantee data integrity.
  • Overcurrent/thermal warning indicator.
• NAND flash: by default NAND technology is SLC. MLC memories are available on request.
• read-only modes: two signals are provided in order to inhibit any write operation on NAND flash. See Read-only modes and Pinout section for more details.
• NAND controller: the controller implements specific algorithms designed
  • to prevent data corruption in case of power failure
  • to recover from unexpected power-off

Specification

• Package outline: Leadless Chip Carrier aka LCC-68 (JEDEC MS004), 9 actual leads per side
• Operating temperature range: -40/+85°C

Integration guide

This sectoin provides useful information and resources that allow the system designer to integrate DUL module in his/her application very quickly.

Backup power supply circuits

Please refer to Backup power supply circuits (SSD modules).

PCB footprint