RoHS Compliant
Serial ATA Flash Drive
SAFD18S4 Product Specifications
December 2nd, 2011
Version 1.0
Apacer Technology Inc.
9/F, No. 100, Hsin Tai Wu Rd., Hsichih, Taipei Hsie n 221, Taiwan
Tel: +886-2-2696-1666 Fax: + 886-2-2696-1668
www.apacer.com
Apacer Technology Inc.
4th Fl., 75 Hsin Tai Wu Rd., Sec.1, Hsichih, New Taipei City, Taiwan 221
Tel: +886-2-2698-2888 Fax: + 886-2-2698-2889
www.apacer.com
Serial ATA Flash Drive
APS1845xxxx-AXX
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© 2011 Apacer Technology Inc. Rev. 1.0
Features:
z Standard Serial ATA 2.6 (Gen. 2)
– Serial ATA 2.6 (Gen. 2)
– SATAⅡ, 3.0 Gbps
– ATA-compatible command set
z Capacities
– 4, 8, 16, 32, 64 GB
z Performance*
– Burst read/write: 300 MB/sec
– Sustained read: up to 165 MB/sec
– Sustained write: up to 150 MB/sec
z Intelligent endurance design
– Built-in hardware ECC, enabling up to
16/24 bit correction per 1K bytes
– Static wear-leveling sche me together
with dynamical block allocation to
significantly increase the lifetime of a
flash device and optimize the disk
performance
– Flash bad-block mana gement
– S.M.A.R.T.
– Power Failure Management
– ATA Secure Erase
– TRIM
z NAND Flash Type: SLC
z Data integrity under power-cycling
– No battery required for data storage
z Temperature ranges
– Operation: 0°C to 70°C (32 ~ 158°F)
– Extended: -40°C to 85°C (-40° ~ 185°F)
– Storage: -40°C to 100°C (-40° ~ 212°F)
z Supply voltage
– 5.0 V ± 5%
z Power consumption (ty pical)*
– Active mode: 333 mA
– Idle mode: 95 mA
z Form factor
– JEDEC MO-297
– Only 4mm in thickness
– Dimensions (54 x 39.8 x 4, unit: mm)
z Connector
– 7-pin SATA signal connector
– 15-pin SATA power connector
z Shock & Vibration
– Shock: 50g (approx.)
– Vibration: 15g (approx.)
z RoHS compliant
*Varies from capacities. The values addressed here are typical and may vary depending on settings and platforms.
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Table of Contents
1. Product Description.................................................................................................3
1.1 Introduction.................................................................................................................................................3
1.2 Functional Block Diagram..........................................................................................................................3
1.3 ATA Mode Support....................................................................................................................................4
1.4 Capacity Specification.................................................................................................................................4
1.5 Performance.................................................................................................................................................4
1.6 Pin Assignments ..........................................................................................................................................5
2. Software Interface....................................................................................................7
2.1 Command Set ..............................................................................................................................................7
3. Flash Management...................................................................................................8
3.1 Error Correction/Detection........................................................................................................................8
3.2 Bad Block Management..............................................................................................................................8
3.3 Wear Leveling..............................................................................................................................................8
3.4 Power Failure Management.......................................................................................................................8
3.5 ATA Secure Erase.......................................................................................................................................8
3.6 S.M.A.R.T....................................................................................................................................................9
3.7 TRIM............................................................................................................................................................9
4. Environmental Specifications...............................................................................10
4.1 Environments.............................................................................................................................................10
4.2 Mean Time Between Failures (MTBF)....................................................................................................10
4.3 Certification and Compliance..................................................................................................................10
5. Electrical Characteristics ......................................................................................11
5.1 Operating Vol tage.....................................................................................................................................11
5.2 Power Consumption..................................................................................................................................11
5.3 Electrostatic Discharge.............................................................................................................................11
5.4 Electrical Fast Transient/Burst................................................................................................................12
6. Physical Characteristics........................................................................................13
7. Product Ordering Information...............................................................................15
7.1 Product C ode Desi gn ations ......................................................................................................................15
7.2 Valid Combinations ..................................................................................................................................16
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1. Product Description
1.1 Introduction
Apacer’s SAFD18S4 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 tran sferred between the host and the flash devices.
SAFD18S4 drive is designed with a single-chip controller, offering capacities of up to 64 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.
In addition to buffer management through dynamical allocation, SAFD18S4 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 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 drive includes a single-chip SATA ⅡController 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 block diagram
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1.3 ATA Mode Support
SAFD18S4 provides ATA mode support as follows:
z Up to PIO mode-4
z Up to Multiword DMA mode-2
z Up to UDMA mode-5
1.4 Capacity Specification
Capacity specification of SAFD18S4 product family is available as shown in Table 1-1. It lists the specific
capacity, the default numbers of logical cylinders and heads, and the number of logical sectors per track for
each product line.
Table 1-1 Capacity specification
Capacity Total Bytes* Cylinders Heads Sectors Max LBA*
4 GB 3,011,420,160 5,835 16 63 5,881,680
8 GB 7,012,196,352 15,334 16 63 13,695,696
16 GB 16,013,942,784 16,383 16 63 31,277,232
32 GB 32,017,047,552 16,383 16 63 62,533,296
64 GB 64,023,257,088 16,383 16 63 125,045,424
*Display of total bytes varies from file systems.
**Cylinders, heads or sectors are not applicable for these capacities. Only LBA addressing applies.
1.5 Performance
Performance of SAFD18S4 is shown in Table 1-2.
Table 1-2 Performance specification
Capacity
Performance 4 GB 8 GB 16 GB 32 GB 64 GB
Sustained Read
(MB/s) 150 160 160 160 165
Sustained Write
(MB/s) 50 95 95 145 150
Note: Performance varies from flash configurations.
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1.6 Pin Assignments
Table 1-3 describes the SAFD signal segment, and Table1-4, po wer segment.
Figure 1-2 SATA Connectors
Table 1-3: Signal segment Table 1-4: Power segment
Name Type Description Pin Signal/Description
S1 GND P1 Unused (3.3V)
S2 RxP + Differential Receive Signal P2 Unused (3.3V)
S3 RxN - Differential Receive Signal P3 Unused (3.3V)
S4 GND P4 Ground
S5 TxN - Differential Transmit Signal P5 Ground
S6 TxP + Differential Transmit Signal P6 Ground
S7 GND P7 5V
P8 5V
P9 5V
P10 Ground
P11 Reserved/Ground
P12 Ground
P13 Unused (12V)
P14 Unused (12V)
P15 Unused (12V)
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Figure 1-3 SATA Cable/Connector Connection Diagram
The connector on the left represents the Host with TX/RX differential pairs connected to a cable. The
connector on the right shows the Device with TX/RX differential pairs also connected to the cable. Notice also
the ground path connecting the shielding of the cable to the Cable Recepta cle.
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2. Software Interface
2.1 Command Set
Table 2-1 summarizes the ATA commands supported by SAFD18S 4.
Table 2-1: Command set
Code Command Code Command
E5h Check Power Mode F3h Securit
y
Erase Pre
p
are
06h Data Set Mana
g
ement F4h Securit
y
Erase Unit
90h Execute Device Dia
g
nostic F5h Securit
y
Freeze Lock
E7h Flush Cache F1h Securit
y
Set Password
EAh Flush Cache EXT F2h Securit
y
Unlock
Ech Identif
y
Device 70h Seek
E3h Idle Efh Set Features
E1h Idle Immediate C6h Set Multi
le Mode
91h Initialize Device Parameters E6h Slee
p
C8h Read DMA B0h SMART
25h Read DMA EXT E2h Standb
y
C4h Read Multi
p
le E0h Standb
y
Immediate
29h Read Multi
p
le EXT Cah Write DMA
20h Read Secto
r
35h Wr ite DMA EXT
24h Read Sector EXT C5h Write Multi
p
le
40h Read Verif
y
Sectors 39h Wr ite Multi
p
le E
X
T
42h Read Verif
y
Sectors EXT 30h Wr ite Secto
r
10h Recalibrate 34h W r ite Sector EXT
F6h Securit
y
Disable Password
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3. Flash Management
3.1 Error Correction/Detection
SAFD18S4 implements a hardware ECC scheme, based on the BCH algorithm. It can detect and correct up to
16 bits or 24 bits error in 1K bytes.
3.2 Bad Block Management
Although bad blocks on the flash media are already identified by the flash manufacturer, they can also be
accumulated over time during operation. SAFD18S4’s controller maintains a table that lists those normal
blocks with disk data, the free blocks for wear leveling, and bad blocks with errors. When a normal block is
detected broken, it is replaced with a free block and listed as a bad block. When a free block is detected
broken, it is then removed from the free block list and marked as a bad blo c k.
During device operation, this ensures that newly accumulated bad blocks are transparent to the host. The
device will stop file write service once there are only two free blocks left such that the read function is still
available for copying the files from the disk into another.
3.3 Wear Leveling
The NAND flash devices are limited by a certain number of write cycles. When using a FAT-based file system,
frequent FAT table updates are required. If some area on the flash wears out faster than others, it would
significantly reduce the lifetime of the whole SSD, even if the erase counts of others are far from the write
cycle limit. Thus, if the write cycles can be distributed evenly across the media, the lifetime of the media can
be prolonged significantly. This scheme is called wear leveling.
Apacer’s wear-leveling scheme is achieved both via buffer management and Apacer-specific static wear
leveling. They both ensure that the lifetime of the flash media can be increased, and the disk access
performance is optimized as well.
3.4 Power Failure Management
The Low Power Detection on the controller initiates crucial data saving before the power supplied to the
device is too low. This feature prevents the device from crash and ensures data integrity during an
unexpected power-off.
3.5 ATA Secure Erase
Accomplished by the Secure Erase (SE) command, which added to the open ANSI standards that control disk
drives, “ATA Secure Erase” is built into the disk drive itself and thus far less susceptible to malicious software
attacks than external software utilities. It is a positive easy-to-use data destroy command, amounting to
electronic data shredding. Executing the command causes a drive to internally completely erase all possible
user data. This command is carried out within disk drives, so no additional software is required. Once
executed, neither data nor the erase counter on the device would be recoverable, which blurs the accuracy of
device lifespan. The process to erase will not be stopped until finished while encountering power failure, and
will be continued when power is back on.
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3.6 S.M.A.R.T.
S.M.A.R.T. is an acronym for Self-Monitoring, Analysis and Reporting Technology, an open standard allowing
disk drives to automatically monitor their own health and report potential problems. It protects the user from
unscheduled downtime by monitoring and storing critical drive performance and calibration parameters. Ideally,
this should allow taking pro active actions to prevent impending drive failure.
Apacer SAFD18S4 uses the standard SMART command B0h to read data from the drive for SMART feature
as the SATA Rev.2.6 ATA/ATAPI-7 specifications. Based on the SFF-8035i Rev. 2.0 specifications, Apacer
SMART defines vendor-specified SMART Attribute IDs (A0h, A1h, A2h, A3h, A4h-A5h) in SAFD18S4. They
represent initial back block count, bad block count, spare block count, maximum erase count, and average
erase counts respectively. When the Apacer SMART Utility running on the host, it analyzes and reports the
disk status to the host before SAFD18S4 is in critical condition.
3.7 TRIM
Made of millions of NAND flash cells, SSD can be written into groups called pages in 4K size generally, but
can only be erased in larger groups called blocks of 128 pages or 512KB. These stipulations are partially the
source of many performance issues. Until an address gets used again, the SSD has to keep track of every
last bit of data that’s written on it. The ATA-TRIM instruction tilts the balance in favor of the SSD. TRIM
addresses a major part of the performance degradation issue over time that plagues all SSDs. A TRIM
enabled drive running an OS with TRIM support will stay closer to its peak performance over ti me.
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4. Environmental Specifications
4.1 Environments
SAFD18S4 environmental specifications follow the US Military Standard MIL-STD-810F, as shown in below
table.
Table 4-1 SAFD18S4 environmental specifications
Environment Specification
0°C to 70°C (Operating), -40°C to 85°C (op erating-extended)
Temperature -40°C to 100°C (Non-operating)
Humidity 5% to 95% RH (Non-condensing)
Vibration Sine wave : 15(G), 10~2000(Hz),
Random : 7.7(Grms), 20~2000(Hz)
Shock – Operating Acceleration: 1,500 G, 0.5 ms
Peak acceleration: 50 G, 11 ms
4.2 Mean Time Between Failures (MTBF)
Mean Time Between Failures (MTBF) is predicted based on reliability data for the individual components in
SAFD drive. Although many component of MTBF are given in databases and often these values are not really
accurate, the prediction result for the SAFD1 8S4 is more than 2,000,000 hours.
Notes about the MTBF:
The MTBF is predicated and calculated based on “Telcordia Technologies Special Report, SR-332, Issue 2”
method.
4.3 Certification and Compliance
SAFD18S4 complies with the followi ng standards:
z CE – EN55022/55024
z FCC 47CFR Part15 Class B
z RoHS
z MIL-STD-810F
z SATA II (SATA Rev. 2.6)
z Up to ATA/ATAPI-7 ( including S.M.A.R.T.)
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5. Electrical Characteristics
5.1 Operating Voltage
Table 5-1 lists the supply voltage for SAFD1 8S4.
Table 5-1 SAFD18S4 operating voltage
Parameter Conditions
Supply voltage 5V ±5% ( 4.75-5.25 V)
5.2 Power Consumption
Table 5-2 Power consumption (typical)
Capacity
Mode 4 GB 8 GB 16 GB 32 GB 64 GB
Active
(mA) 255 333 333 280 300
Stand By
(mA) 85 95 95 77 80
Note: Power consumptions may vary depending on settings and platforms
5.3 Electrostatic Discharge
Electrostatic discharge
Item Amount of
Discharge Voltage Required
Criteria Complied To Criteria
(A,B,C)
Air Discharge 10
10
+8kV
-8kV
B
B
A
A
Contact
Discharge
25
25
+4kV
-4kV
B
B
A
A
Indirect
Discharge
(HCP)
25
25
+4kV
-4kV
B
B
A
A
Indirect
Discharge
(VCP Front)
25
25
+4kV
-4kV
B
B
A
A
Indirect
Discharge
(VCP Left)
25
25
+4kV
-4kV
B
B
A
A
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Indirect
Discharge
(VCP Back)
25
25
+4kV
-4kV
B
B
A
A
Indirect
Discharge
(VCP Right)
25
25
+4kV
-4kV
B
B
A
A
5.4 Electrical Fast Transient/Burst
Electrical Fast Transient/Burst
Inject
Line Polarity Voltage
kV
Inject
Time
(Second)
Inject
Method Required
Criteria
Complied
to
Criteria
L-N-PE ± 1kV 60 Direct B A
Notes about 5.3 Electrostatic Discharge & 5.4 Electrical Fast Transient/Burst
The tests performed are from lowest level up to the highest level as required by standard, but only highest
level is shown on the report.
Meet criteria A: Operate as intended during a nd after the test
Meet criteria B: Operate as intended after the test
Meet criteria C: Loss/Error of function
Additional Information:
EUT stopped operation and could / could not be reset by operator at kV.
No false alarms or other malfun ctions were observed during or after the test.
The Contact discharges were applied at least total 200 discharges at a minimum of four test points.
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6. Physical Characteristics
Unit: ㎜
Tolerance: ± 0.2
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Unit: ㎜
Tolerance: ± 0.2
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7. Product Ordering Information
7.1 Product Code Designations
A P S 184 5 x x x x – A X X
Serial ATA Flash Drive
Apacer Product Code
MO-297 Form Factor
Solution version
Capacities:
004G = 4GB
008G = 8GB
016G = 16GB
032G = 32GB
064G = 64GB
Flash type
T: Toshiba
C: Micron
Version Control
Temperature Range
Blank: Standard
W: Extended Temperature
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7.2 Valid Combinations
Capacity Standard Extended Temperature
4GB APS1845004G-AT APS1845004G-ATW
8GB APS1845008G-AT APS1845008G-ATW
16GB APS1845016G-AT APS1845016G-ATW
32GB APS1845032G-AC APS1845032G-ACW
64GB APS1845064G-AC APS1845064G-ACW
Note: Valid combinations are those products in mass production or will be in mass production. Consult your
Apacer sales representative to confirm availability of valid combinations and to determine availability of new
combinations.
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© 2011 Apacer Technology Inc. Rev. 1.0
Revision History
Revision Description Date
0.1 Preliminary release 11/17/2011
1.0 Official release 12/02/2011
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© 2011 Apacer Technology Inc. Rev. 1.0
Global Presence
Taiwan (Headquarters)
Apacer Technology Inc.
4th Fl., 75 Hsin Tai Wu Rd., Sec.1
Hsichih, New Taipei City
Taiwan 221
R.O.C.
Tel: +886-2-2698-2888
Fax: +886-2-2698-2 889
amtsales@apacer.com
U.S.A.
Apacer Memory America, Inc.
386 Fairview Way, Suite102,
Milpitas, CA 95035
Tel: 1-408-518-8699
Fax: 1-408-935-9611
sa@apacerus.com
Japan
Apacer Technology Corp.
5F, Matsura Bldg., Shiba, Minato-Ku
Tokyo, 105-0014, Japan
Tel: 81-3-5419-2668
Fax: 81-3-5419-0018
jpservices@apacer.com
Europe
Apacer Technology B.V.
Science Park Eindhoven 5051 5692 EB Son,
The Netherlands
Tel: 31-40-267-0000
Fax: 31-40-267- 0000#6199
sales@apacer.nl
China
Apacer Electronic (Shanghai) Co., Ltd
1301, No.251,Xiaomuqiao Road, Shanghai,
200032, China
Tel: 86-21-5529-0222
Fax: 86-21-5206-6939
sales@apacer.com.cn
India
Apacer Technologies Pvt Ltd,
#1064, 1st Floor, 7th ‘A’ Main,
3rd Block Koramangala, Bang alore – 560 034
Tel: +91 80 4152 9061/62/63
Fax: +91 80 4170 02 15
sales_india@apacer.com
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