Serial ATA Flash Drive

AP-SAFD255AXxxxxS-XXT

3

© 2011 Apacer Technology Inc.

Rev. 1.2

1. Product Description

1.1

Introduction

Apacer’s Serial ATA Flash Drive (SAFD) 255 is a solid-state disk (SSD) drive that contains a controller,

embedded firmware, and flash media along with a male connector. Using single-level cell (SLC) NAND flash

memory devices, the SAFD 255 interfaces with the host allowing data to be seamlessly transferred between

the host and the flash devices.

The SAFD 255 is designed with a single-chip controller, offering capacities of up to 64 gigabytes and providing

full support for the SATA II high-speed interface standard. It can operate at burst access rates of up to 300

megabytes per second, which is much faster than any other solid-state or traditional SATA drive currently

available on the market.

In addition to buffer management through dynamical allocation, the SAFD 255 adopts the Apacer-specific

static wear-leveling scheme to allow uniform use of all storage blocks, ensuring that the lifetime of a flash

media can be significantly increased and the disk performance is optimized as well. The SAFD 255 provides

the S.M.A.R.T. feature that follows the SATA Rev. 2.6, ATA/ATAPI-7 specifications and uses the standard

SMART command B0h to read data from the drive. This feature protects the user from unscheduled downtime

by monitoring and storing critical drive performance.

1.2

Functional Block Diagram

The SAFD 255 includes a single-chip SATA II Controller and the flash media, as well as the SATA standard

interface. The controller integrates the flash management unit with the controller itself to support multi-channel,

multi-bank flash arrays. Figure 1-1 shows the functional block diagram.

Figure 1-1 Apacer SAFD 255 block diagram