Serial ATA Flash Drive

APS1845xxxx-ACMX

3

©2012 Apacer Technology Inc.

Rev. 1.3

1.

Product Description

1.1 Introduction

Apacer’s SAFD18S4-M is a solid-state disk (SSD) drive that contains a controller, embedded firmware, and

flash media along with a male connector. Using NAND flash memory devices, the SAFD drive interfaces with

the host allowing data to be seamlessly transferred between the host and the flash devices.

SAFD18S4-M drive is designed with a single-chip controller, offering capacities of up to 128 gigabytes and

providing full support for the SATAⅡ high-speed interface standard. It can operate at sustained access rates

of up to 100 megabytes per second, which is much faster than any other solid-state or traditional SATA drive

currently available on the market. Though built with MLC, this SSD can work in highly demanding

environment as it can withstand ambient temperature from -40°C to +85°C (for certain capacities only).

In addition to buffer management through dynamical allocation, SAFD18S4-M adopts the Apacer-specific

global 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. SAFD18S4-M 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

SAFD18S4-M drive includes a single-chip SATAⅡ 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 SAFD18S4-M block diagram