RoHS Compliant
M.2 2242 Flash Drive
ST250-M242 Product Specifications
June 21, 2022
Version 1.6
Apacer Technology Inc.
1F, No.32, Zhongcheng Rd., Tucheng Dist., New Taipei City, Taiwan, R.O.C
Tel: +886-2-2267-8000
www.apacer.com
Fax: +886-2-2267-2261
Specifications Overview:
Compliance with SATA Revision 3.1
Temperature Range
–
SATA 6 Gb/s interface
–
Operating: 0°C to 70°C
–
ATA-8 command set
–
Storage: -40°C to 100°C
–
Backward compatible with SATA 1.5/3 Gb/s
Capacity
–
Supply Voltage
–
64, 128, 256, 512 GB
Performance1
–
Burst read/write: 600 MB/sec
–
Sequential read: Up to 560 MB/sec
–
Sequential write: Up to 520 MB/sec
–
Random read (4K): Up to 59,000 IOPS
–
Random write (4K): Up to 75,000 IOPS
Power Consumption1
–
Active mode: 435 mA
–
Idle mode: 65 mA
SATA Power Management Modes
Connector Type
–
Flash Management
3.3 V ± 5%
75-pin SATA-based M.2 module pinout
Form Factor
–
Low-Density Parity-Check (LDPC) Code
–
M.2 2242-D5-B-M
–
Global Wear Leveling
–
Dimensions: 42.00 x 22.00 x 3.80, unit: mm
–
Flash bad-block management
–
Net Weight: 3.86g ± 5%
–
Flash Translation Layer: Page Mapping
–
S.M.A.R.T.
–
DataDefenderTM
–
Device Sleep
–
ATA Secure Erase
–
TRIM
–
Hyper Cache Technology
–
SAMRT Read RefreshTM
NAND Flash Type: 3D TLC (BiCS4)
MTBF: >3,000,000 hours
Endurance (in drive writes per day: DWPD)
64 GB: 2.32 DWPD
–
128 GB: 2.38 DWPD
–
256 GB: 2.38 DWPD
–
512 GB: 2.36 DWPD
Security
–
–
AES 256-bit hardware encryption
Reliability
–
Thermal Sensor
–
Thermal Throttling (optional)
–
End-to-End Data Protection
RoHS Compliant
Note:
1. Varies from capacities. The values for performances and power consumptions presented are typical and may vary
depending on flash configurations or platform settings. The term idle refers to the standby state of the device.
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© 2022 Apacer Technology Inc.
Table of Contents
1. General Description ..........................................................................4
2. Functional Block ...............................................................................4
3. Pin Assignments ................................................................................5
4. Product Specifications ......................................................................8
4.1 Capacity ......................................................................................................................................... 8
4.2 Performance .................................................................................................................................. 8
4.3 Environmental Specifications ........................................................................................................ 9
4.4 Mean Time Between Failures (MTBF) .......................................................................................... 9
4.5 Certification and Compliance......................................................................................................... 9
4.6 Endurance ................................................................................................................................... 10
4.7 LED Indicator Behavior ................................................................................................................ 10
5. Flash Management ..........................................................................11
5.1 Error Correction/Detection ........................................................................................................... 11
5.2 Bad Block Management .............................................................................................................. 11
5.3 Global Wear Leveling .................................................................................................................. 11
5.4 DataDefenderTM ........................................................................................................................... 11
5.5 ATA Secure Erase ....................................................................................................................... 11
5.6 TRIM ............................................................................................................................................ 12
5.7 Flash Translation Layer – Page Mapping.................................................................................... 12
5.8 Device Sleep (DevSleep or DEVSLP) Mode ............................................................................... 12
5.9 Hyper Cache Technology ............................................................................................................ 12
5.10 SATA Power Management ........................................................................................................ 13
5.11 SMART Read RefreshTM ........................................................................................................... 13
6. Security and Reliability Features ...................................................14
6.1 Advanced Encryption Standard ................................................................................................... 14
6.2 Thermal Sensor ........................................................................................................................... 14
6.3 Thermal Throttling (optional) ....................................................................................................... 14
6.4 End-to-End Data Protection......................................................................................................... 14
7. Software Interface ..........................................................................15
7.1 Command Set .............................................................................................................................. 15
7.2 S.M.A.R.T. ................................................................................................................................... 16
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© 2022 Apacer Technology Inc.
8. Electrical Specifications.................................................................18
8.1 Operating Voltage ........................................................................................................................ 18
8.2 Power Consumption .................................................................................................................... 18
9. Mechanical Specifications..............................................................19
9.1 Dimensions .................................................................................................................................. 19
9.2 Net Weight ................................................................................................................................... 19
10. Product Ordering Information .......................................................20
10.1 Product Code Designations ....................................................................................................... 20
10.2 Valid Combinations .................................................................................................................... 21
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© 2022 Apacer Technology Inc.
1. General Description
Apacer ST250-M242 is the next generation Solid State Drive (SSD) with compact and removable
storage to support larger, faster hosts deployed in a wide range of applications that require
outstanding performance. Designed with SATA-based connector pinouts and in SATA 6 Gb/s
interface, ST250-M242 provides full compliance with the latest SATA Revision 3.1 interface
specifications and delivers exceptional read/write speed, making it the leading add-in storage solution
for future host computing systems.
ST250-M242 utilizes 3D NAND for higher capacity up to 512GB and provides more power efficiency
than 2D NAND. Regarding reliability, ST250-M242 is built with a powerful SATA controller that
supports on-the-module ECC as well as efficient wear leveling scheme and implemented with LDPC
(Low Density Parity Check) ECC engine to extend SSD endurance and increase data reliability.
Furthermore, ST250-M242 is equipped with a built-in thermal sensor to monitor the temperature of the
SSD via S.M.A.R.T commands and configured with thermal throttling to dynamically adjust frequency
scaling to enhance data reliability and provide sustained performance while overheating. Operating
under 6 Gb/s interface, ST250-M242 is provided with Apacer latest S.M.A.R.T. that is primarily
oriented for the latest SATA interface SSD, for drive lifetime monitoring and analysis. For highlyintensive applications, End-to-End Data Protection ensures that data integrity can be assured at
multiple points in the path to enable reliable delivery of data transfers.
Security-wise, Advanced Encryption Standard (AES) ensures data security and provides users with
peace of mind knowing their data is safeguarded at all times. ST250-M242 also adopts the latest page
mapping file translation layer and comes with various implementations including power saving modes,
wear leveling, flash block management, S.M.A.R.T., TRIM, Hyper Cache technology, DataDefenderTM
and SMART Read RefreshTM.
2. Functional Block
Apacer ST250-M242 includes a single-chip controller and flash media. The controller integrates the
flash management unit to support multi-channel, multi-bank flash arrays. Figure 2-1 shows the
functional block diagram.
Controller
Flash data bus & ECC engine
Host
Interface
SATAI/O & PHY
SATA 6 Gb/s
Interface
Flash
Flash
Figure 2-1 Functional Block Diagram
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© 2022 Apacer Technology Inc.
3. Pin Assignments
This connector does not support hot plug capability. There are a total of 75 pins. 12 pin locations are
used for mechanical key locations; this allows such a module to plug into both Key B and Key M
connectors.
Figure 3-1 SATA Connectors
Table 3-1 Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Type
CONFIG_3
3.3V
GND
3.3V
No connect
Not available
Not available
Not available
No connect
DAS/DSS
No connect
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
Not available
CONFIG_0
Not available
Not available
Not available
Not available
Not available
GND
Not available
PERn1
Not available
Description
Ground (according to M.2 configurations for SSD-SATA definition)
Supply Pin, 3.3V
Ground
Supply pin, 3.3V
No connect
No connect
No connect
Reserved for Apacer use only1
No connect
Device Activity Signal/Disable Staggered Spin-up
No connect
Mechanical notch B
Mechanical notch B
Mechanical notch B
Mechanical notch B
Mechanical notch B
Mechanical notch B
Mechanical notch B
Mechanical notch B
No connect
Ground (according to M.2 configurations for SSD-SATA definition)
No connect
No connect
No connect
No connect
No connect
Ground
No connect
No connect
No connect
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© 2022 Apacer Technology Inc.
Table 3-1 Pin Assignments
Pin
31
32
33
34
35
36
37
Type
PERp1
Not available
GND
Not available
PETn1
Not available
PETp1
38
DEVSLP
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
GND
Not available
SATA-Rx+
Not available
SATA-RxNot available
GND
Not available
SATA-TxNot available
SATA-Tx+
PERST#
GND
CLKREQ#
REFCLKN
PEWAKE#
REFCLKP
MFG1
GND
MFG2
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
(removed for key)
Not available
SUSCLK
CONFIG_1
3.3V
GND
3.3V
GND
3.3V
CONFIG_2
Description
No connect
No connect
Ground
No connect
No connect
No connect
No connect
Device Sleep, input. If driven high the host is informing the SSD to enter a
low power state
Ground
No connect
Host receiver differential signal pair
No connect
Host receiver differential signal pair
No connect
Ground
No connect
Host transmitter differential pair
No connect
Host transmitter differential pair
No connect
Ground
No connect
No connect
No connect
No connect
Reserved for Apacer use only1
Ground
Reserved for Apacer use only1
Mechanical notch M
Mechanical notch M
Mechanical notch M
Mechanical notch M
Mechanical notch M
Mechanical notch M
Mechanical notch M
Mechanical notch M
No connect
No connect
Ground
Supply pin, 3.3V
Ground
Supply pin, 3.3V
Ground
Supply pin, 3.3V
Ground
Note:
1.
Reserved by Apacer, please do not connect to a host.
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© 2022 Apacer Technology Inc.
Figure 3-2 Direct Connection between the Host and Device
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© 2022 Apacer Technology Inc.
4. Product Specifications
4.1 Capacity
Capacity specifications of ST250-M242 are available as shown in Table 4-1. It lists the specific
capacity and the default numbers of heads, sectors and cylinders for each product line.
Table 4-1 Capacity Specifications
Capacity
Total bytes
Cylinders
Heads
Sectors
Total LBA
64 GB
60,022,480,896
16,383
16
63
117,231,408
128 GB
120,034,123,776
16,383
16
63
234,441,648
256 GB
240,057,409,536
16,383
16
63
468,862,128
512 GB
480,103,981,056
16,383
16
63
937,703,088
Notes:
Display of total bytes varies from operating systems.
1 GB = 1,000,000,000 bytes; 1 sector = 512 bytes.
LBA count addressed in the table above indicates total user storage capacity and will remain the same throughout the
lifespan of the device. However, the total usable capacity of the SSD is most likely to be less than the total physical
capacity because a small portion of the capacity is reserved for device maintenance usages.
4.2 Performance
Performance of ST250-M242 is listed below in Table 4-2.
Table 4-2 Performance Specifications
Capacity
64 GB
128 GB
256 GB
512 GB
Sequential Read (MB/s)
475
560
560
560
Sequential Write (MB/s)
310
500
470
520
Random Read IOPS (4K)
16,000
39,000
33,000
59,000
Random Write IOPS (4K)
64,000
75,000
71,000
73,000
Performance
Notes:
Results may differ from various flash configurations or host system setting.
Sequential read/write is based on CrystalDiskMark 5.2.1 with file size 1,000MB.
Random read/write is measured using IOMeter with Queue Depth 32.
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4.3 Environmental Specifications
Environmental specifications of ST250-M242 product are shown in Table 4-3.
Table 4-3 Environmental Specifications
Item
Specifications
Operating temp.
0°C to 70°C
Non-operating temp.
-40°C to 100°C
Operating vibration
7.69 GRMS, 20~2000 Hz/random (compliant with MIL-STD-810G)
Non-operating vibration
4.02 GRMS, 15~2000 Hz/random (compliant with MIL-STD-810G)
Operating shock
50G, 11ms
Non-operating shock
1500G, 0.5ms (compliant with MIL-STD-883K)
Note: This Environmental Specification table indicates the conditions for testing the device. Real world usages may affect the
results.
4.4 Mean Time Between Failures (MTBF)
Mean Time Between Failures (MTBF) is predicted based on reliability data for the individual
components in ST250-M242. The prediction result for ST250-M242 is more than 3,000,000 hours.
Note: The MTBF is predicated and calculated based on “Telcordia Technologies Special Report, SR-332, Issue
3” method.
4.5 Certification and Compliance
ST250-M242 complies with the following standards:
CE
FCC
RoHS Recast
MIL-STD-810
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4.6 Endurance
The endurance of a storage device is predicted by Drive Writes Per Day based on several factors
related to usage, such as the amount of data written into the drive, block management conditions, and
daily workload for the drive. Thus, key factors, such as Write Amplifications and the number of P/E
cycles, can influence the lifespan of the drive.
Table 4-4 Endurance Specifications
Capacity
Drive Writes Per Day
64 GB
2.32
128 GB
2.38
256 GB
2.38
512 GB
2.36
Notes:
This estimation complies with JEDEC JESD-219, Enterprise endurance workload of random data with payload size
distribution.
Flash vendor guaranteed 3D NAND TLC P/E cycle: 3K
WAF may vary from capacity, flash configurations and writing behavior on each platform.
1 Terabyte = 1,024GB
DWPD (Drive Writes Per Day) is calculated based on the number of times that user overwrites the entire capacity of an
SSD per day of its lifetime during the warranty period. (3D NAND TLC warranty: 3 years)
4.7 LED Indicator Behavior
The behavior of the ST250-M242 LED indicators is described in Table 4-5.
Table 4-5 LED Behavior
Location
LED
Description
LED A
HDDA1
LED blinks when the drive is being accessed
A
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5. Flash Management
5.1 Error Correction/Detection
ST250-M242 implements a hardware ECC scheme, based on the Low Density Parity Check (LDPC).
LDPC is a class of linear block error correcting code which has apparent coding gain over BCH code
because LDPC code includes both hard decoding and soft decoding algorithms. With the error rate
decreasing, LDPC can extend SSD endurance and increase data reliability while reading raw data
inside a flash chip.
5.2 Bad Block Management
Current production technology is unable to guarantee total reliability of NAND flash memory array.
When a flash memory device leaves factory, it comes with a minimal number of initial bad blocks
during production or out-of-factory as there is no currently known technology that produce flash chips
free of bad blocks. In addition, bad blocks may develop during program/erase cycles. Since bad
blocks are inevitable, the solution is to keep them in control. Apacer flash devices are programmed
with ECC, page mapping technique and S.M.A.R.T to reduce invalidity or error. Once bad blocks are
detected, data in those blocks will be transferred to free blocks and error will be corrected by
designated algorithms.
5.3 Global Wear Leveling
Flash memory devices differ from Hard Disk Drives (HDDs) in terms of how blocks are utilized. For
HDDs, when a change is made to stored data, like erase or update, the controller mechanism on
HDDs will perform overwrites on blocks. Unlike HDDs, flash blocks cannot be overwritten and each
P/E cycle wears down the lifespan of blocks gradually. Repeatedly program/erase cycles performed
on the same memory cells will eventually cause some blocks to age faster than others. This would
bring flash storages to their end of service term sooner. Global wear leveling is an important
mechanism that levels out the wearing of all blocks so that the wearing-down of all blocks can be
almost evenly distributed. This will increase the lifespan of SSDs.
5.4 DataDefenderTM
Apacer’s DataDefender is an advanced technology of power failure management which combines
both firmware and hardware mechanisms to ensure data integrity. When power disruption occurs, the
low voltage detector will be triggered. When this happens, the SSD’s protection mechanism is
activated and cuts off data transmission from the host. Once the power supply is resumed, the
firmware protection mechanism will ensure the integrity of the firmware as well as the data already
written into the NAND flash media.
5.5 ATA Secure Erase
ATA Secure Erase is an ATA disk purging command currently embedded in most of the storage
drives. Defined in ATA specifications, (ATA) Secure Erase is part of Security Feature Set that allows
storage drives to erase all user data areas. The erase process usually runs on the firmware level as
most of the ATA-based storage media currently in the market are built-in with this command. ATA
Secure Erase can securely wipe out the user data in the drive and protects it from malicious attack.
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© 2022 Apacer Technology Inc.
5.6 TRIM
TRIM is a SATA command that helps improve the read/write performance and efficiency of solid-state
drives (SSD). The command enables the host operating system to inform SSD controller which blocks
contain invalid data, mostly because of the erase commands from host. The invalid will be discarded
permanently and the SSD will retain more space for itself.
5.7 Flash Translation Layer – Page Mapping
Page mapping is an advanced flash management technology whose essence lies in the ability to
gather data, distribute the data into flash pages automatically, and then schedule the data to be
evenly written. Page-level mapping uses one page as the unit of mapping. The most important
characteristic is that each logical page can be mapped to any physical page on the flash memory
device. This mapping algorithm allows different sizes of data to be written to a block as if the data is
written to a data pool and it does not need to take extra operations to process a write command. Thus,
page mapping is adopted to increase random access speed and improve SSD lifespan, reduce block
erase frequency, and achieve optimized performance and lifespan.
5.8 Device Sleep (DevSleep or DEVSLP) Mode
Device Sleep is a feature that allows SATA devices to enter a low power mode by designating a
particular pin as DEVSLP signal with an aim to reducing power consumption.
Figure 5-1 Device Sleep
5.9 Hyper Cache Technology
Apacer proprietary Hyper Cache technology uses a portion of the available capacity as SLC (1bit-percell) NAND flash memory, called Hyper cache mode. When data is written to SSD, the firmware will
direct the data to Hyper Cache mode, providing excellent performance to handle various scenarios in
industrial use.
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5.10 SATA Power Management
By complying with SATA 6 Gb/s specifications, the SSD supports the following SATA power saving
modes:
ACTIVE: PHY ready, full power, TX & RX operational
PARTIAL: Reduces power, resumes in under 10 µs (microseconds)
SLUMBER: Reduces power, resumes in under 10 ms (milliseconds)
HIPM: Host-Initiated Power Management
DIPM: Device-Initiated Power Management
AUTO-SLUMBER: Automatic transition from partial to slumber.
Device Sleep: PHY powered down; power consumption ≦ 5 mW; host assertion time ≦ 10 ms;
exit timeout from this state ≦ 20 ms (unless specified otherwise in SATA Identify Device Log).
Note: The behaviors of power management features would depend on host/device settings.
5.11 SMART Read RefreshTM
Apacer’s SMART Read Refresh plays a proactive role in avoiding read disturb errors from occurring to
ensure health status of all blocks of NAND flash. Developed for read-intensive applications in
particular, SMART Read Refresh is employed to make sure that during read operations, when the
read operation threshold is reached, the data is refreshed by re-writing it to a different block for
subsequent use.
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6. Security and Reliability Features
6.1 Advanced Encryption Standard
Advanced Encryption Standard (AES) is a specification for the encryption of electronic data. AES has
been adopted by the U.S. government since 2001 to protect classified information and is now widely
implemented in embedded computing applications. The AES algorithm used in software and hardware
is symmetric so that encrypting/decrypting requires the same encryption key. Without the key, the
encrypted data is inaccessible to ensure information security.
Notably in flash memory applications, AES 256-bit hardware encryption is the mainstream to protect
sensitive or confidential data. The hardware encryption provides better performance, reliability, and
security than software encryption. It uses a dedicated processor, which is built inside the controller, to
process the encryption and decryption. This enormously shortens the processing time and makes it
efficient.
6.2 Thermal Sensor
Apacer Thermal Sensor is a digital temperature sensor with serial interface. By using a designated pin
for transmission, storage device owners are able to read temperature data.
6.3 Thermal Throttling (optional)
Thermal throttling can monitor the temperature of the SSD equipped with a built-in thermal sensor via
S.M.A.R.T. commands. This method can ensure the temperature of the device stays within
temperature limits by drive throttling, i.e. reducing the speed of the drive when the device temperature
reaches the threshold level, so as to prevent overheating, guarantee data reliability, and prolong
product lifespan. When the temperature exceeds the maximum threshold level, thermal throttling will
be triggered to reduce performance step by step to prevent hardware components from being
damaged. Performance is only permitted to drop to the extent necessary for recovering a stable
temperature to cool down the device’s temperature. Once the temperature decreases to the minimum
threshold value, transfer speeds will rise back to its optimum performance level.
6.4 End-to-End Data Protection
End-to-End Data Protection is a feature implemented in Apacer SSD products that extends error
control to cover the entire path from the host computer to the drive and back, and ensure data
integrity at multiple points in the path to enable reliable delivery of data transfers. Unlike ECC which
does not exhibit the ability to determine the occurrence of errors throughout the process of data
transmission, End-to-End Data Protection allows SSD controller to identify an error created anywhere
in the path and report the error to the host computer before it is written to the drive. This errorchecking and error-reporting mechanism therefore guarantees the trustworthiness and reliability of the
SSD.
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© 2022 Apacer Technology Inc.
7. Software Interface
7.1 Command Set
Table 7-1 summarizes the ATA commands supported by ST250-M242.
Table 7-1 Command Set
Code
Command
Code
Command
E5h
CHECK POWER MODE
F4h
SECURITY ERASE UNIT
06h
DATA SET MANAGEMENT
F5h
SECURITY FREEZE LOCK
92h
DOWNLOAD MICROCODE
F1h
SECURITY SET PASSWORD
90h
EXECUTE DEVICE DIAGNOSTIC
F2h
SECURITY UNLOCK
E7h
FLUSH CACHE
70h
SEEK
EAh
FLUSH CACHE EXT
EFh
SET FEATURES
ECh
IDENTIFY DEVICE
C6h
SET MULTIPLE MODE
E3h
IDLE
E6h
SLEEP
E1h
IDLE IMMEDIATE
B0h
SMART
91h
INITIALIZE DEVICE PARAMETERS
E2h
STANDBY
E4h
READ BUFFER
E0h
STANDBY IMMEDIATE
C8h
READ DMA
E8h
WRITE BUFFER
25h
READ DMA EXT
CAh
WRITE DMA
60h
READ FPDMA QUEUED
35h
WRITE DMA EXT
C4h
READ MULTIPLE
3Dh
WRITE DMA FUA EXT
29h
READ MULTIPLE EXT
61h
WRITE FPDMA QUEUED
2Fh
READ LOG EXT
3Fh
WRITE LOG EXT
47h
READ LOG DMA EXT
57h
WRITE LOG DMA EXT
20h
READ SECTOR
C5h
WRITE MULTIPLE
24h
READ SECTOR EXT
39h
WRITE MULTIPLE EXT
40h
READ VERIFY SECTORS
CEh
WRITE MULTIPLE FUA EXT
42h
READ VERIFY SECTORS EXT
30h
WRITE SECTOR
10h
RECALIBRATE
34h
WRITE SECTOR EXT
F6h
SECURITY DISABLE PASSWORD
45h
WRITE UNCORRECTABLE EXT
F3h
SECURITY ERASE PREPARE
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© 2022 Apacer Technology Inc.
7.2 S.M.A.R.T.
S.M.A.R.T. is an abbreviation for Self-Monitoring, Analysis and Reporting Technology, a selfmonitoring system that provides indicators of drive health as well as potential disk problems. It serves
as a warning for users from unscheduled downtime by monitoring and displaying critical drive
information. Ideally, this should allow taking proactive actions to prevent drive failure and make use of
S.M.A.R.T. information for future product development reference.
Apacer devices use the standard SMART command B0h to read data out from the drive to activate
our S.M.A.R.T. feature that complies with the ATA/ATAPI specifications. S.M.A.R.T. Attribute IDs shall
include initial bad block count, total later bad block count, maximum erase count, average erase count,
power on hours and power cycle. When the S.M.A.R.T. Utility running on the host, it analyzes and
reports the disk status to the host before the device reaches in critical condition.
Note: Attribute IDs may vary from product models due to various solution design and supporting capabilities.
Apacer memory products come with S.M.A.R.T. commands and subcommands for users to obtain
information of drive status and to predict potential drive failures. Users can take advantage of the
following commands/subcommands to monitor the health of the drive.
Table 7-2 SMART Subcommand Set
Code
SMART Subcommand
D0h
READ DATA
D1h
READ ATTRIBUTE THRESHOLDS
D2h
ENABLE/DISABLE ATTRIBUTE AUTOSAVE
D4h
EXECUTE OFF-LINE IMMEDIATE
D5h
SMART READ LOG
D6h
SMART WRITE LOG
D8h
ENABLE OPERATIONS
D9h
DISABLE OPERATIONS
DAh
RETURN STATUS
Table 7-3 General SMART Attribute Structure
Byte
Description
0
ID (Hex)
1–2
Status Flag
3
Value
4
Worst
5*-11
Raw Data
*Byte 5: LSB
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© 2022 Apacer Technology Inc.
Table 7-4 SMART Attribute ID List
ID (Hex)
Attribute Name
9 (0x09)
Power-on Hours
12 (0x0C)
Power Cycle Count
163 (0xA3)
Maximum Erase Count
164 (0xA4)
Average Erase Count
166 (0xA6)
Total Later Bad Block Count
167 (0xA7)
SSD Protect Mode (Vendor Specific)
168 (0xA8)
SATA PHY Error Count
171 (0xAB)
Program Fail Count
172 (0xAC)
Erase Fail Count
175 (0xAF)
Bad Cluster Table Count
192 (0xC0)
Unexpected Power Loss Count
194 (0xC2)
Temperature
231 (0xE7)
Lifetime Left
241 (0xF1)
Total Sectors of Write
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© 2022 Apacer Technology Inc.
8. Electrical Specifications
8.1 Operating Voltage
Table 8-1 lists the supply voltage for ST250-M242.
Table 8-1 Operating Range
Item
Range
Supply Voltage
3.3V ± 5%
8.2 Power Consumption
Table 8-2 lists the power consumption for ST250-M242.
Table 8-2 Power Consumption
Capacity
64 GB
128 GB
256 GB
512 GB
Active (mA)
345
395
430
435
Idle (mA)
65
65
65
65
Mode
Notes:
All values are typical and may vary depending on flash configurations or host system settings.
Active power is an average power measurement performed using CrystalDiskMark with 128KB sequential read/write
transfers.
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© 2022 Apacer Technology Inc.
9. Mechanical Specifications
9.1 Dimensions
Unit: mm
Figure 9-1 Physical Dimensions
9.2 Net Weight
Table 9-1 Net Weight
Capacity
Net Weight (g ± 5%)
64GB
3.4
128GB
3.84
256GB
3.86
512GB
3.54
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© 2022 Apacer Technology Inc.
10. Product Ordering Information
10.1 Product Code Designations
Apacer’s ST250-M242 SSD is available in different configurations and densities. See the chart below
for a comprehensive list of options for the ST250-M242 series devices.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A
3
2
.
2
5
C
X
G
B
.
X
X
X
7
8
Code
Code 1-3
(Product Line & Form Factor)
Code 5-6
(Model/Solution)
SATA M.2 2242
ST250
CG: 64GB
CH: 128GB
CJ: 256GB
CK: 512GB
Code 7-8
(Product Capacity)
Code 9
(Flash Type & Product Temp)
Code 10
(Product Spec)
Code 12-14
(Version Number)
Code 15-16
(Firmware Version)
3D TLC Standard temperature
Double side B+M key
Random numbers generated by system
Thermal Sensor DEVSLP
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© 2022 Apacer Technology Inc.
10.2 Valid Combinations
The following table lists the available models of the ST250-M242 series which are 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.
Capacity
Valid Combination
64GB
A32.25CGGB.00178
128GB
A32.25CHGB.00178
256GB
A32.25CJGB.00178
512GB
A32.25CKGB.00178
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© 2022 Apacer Technology Inc.
Revision History
Revision
Description
Date
1.0
Initial release
9/17/2020
1.1
Added 256-512GB support
10/8/2020
1.2
- Updated endurance rating for 512GB at the Endurance section on
Specifications Overview page and 4.6 Endurance
- Updated 10. Product Ordering Information due to firmware
change
12/7/2020
- Added AES to Specifications Overview
1.3
- Updated 1. General Descriptions by adding AES support
7/16/2021
- Added 6.1 Advanced Encryption Standard
1.4
Updated notes regarding P/E cycle and warranty period at 4.6
Endurance
8/12/2021
1.5
Updated the description of 5.4 DataDefenderTM
12/20/2021
1.6
- Updated endurance rating and warranty period at Endurance on
Specifications Overview page and 4.6 Endurance
6/21/2022
- Updated pin description for Table 3-1 Pin Assignments
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© 2022 Apacer Technology Inc.
Global Presence
Taiwan (Headquarters)
U.S.A.
Apacer Technology Inc.
1F., No.32, Zhongcheng Rd., Tucheng Dist.,
New Taipei City 236, Taiwan R.O.C.
Tel: 886-2-2267-8000
Fax: 886-2-2267-2261
amtsales@apacer.com
Apacer Memory America, Inc.
46732 Lakeview Blvd., Fremont, CA 94538
Tel: 1-408-518-8699
Fax: 1-510-249-9551
sa@apacerus.com
Japan
Europe
Apacer Technology Corp.
6F, Daiyontamachi Bldg., 2-17-12, Shibaura, Minato-Ku,
Tokyo, 108-0023, Japan
Tel: 81-3-5419-2668
Fax: 81-3-5419-0018
jpservices@apacer.com
Apacer Technology B.V.
Science Park Eindhoven 5051 5692 EB Son,
The Netherlands
Tel: 31-40-267-0000
Fax: 31-40-290-0686
sales@apacer.nl
China
India
Apacer Electronic (Shanghai) Co., Ltd
Room D, 22/FL, No.2, Lane 600, JieyunPlaza,
Tianshan RD, Shanghai, 200051, China
Tel: 86-21-6228-9939
Fax: 86-21-6228-9936
sales@apacer.com.cn
Apacer Technologies Pvt Ltd,
1874, South End C Cross, 9th Block Jayanagar,
Bangalore-560069, India
Tel: 91-80-4152-9061/62
Fax: 91-80-4170-0215
sales_india@apacer.com
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