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- True IDE Compatibility: Fully compliant with the ATA/IDE standard; recognized by BIOS as a standard hard disk without special drivers.
- Compact Module Design: Vertical 44‑pin form factor minimizes footprint for space‑constrained embedded systems.
- Industrial Grade Reliability: Operating temperature 0 °C – 70 °C; non‑operating –20 °C – 85 °C; MTBF 300,000 rewrite cycles @ 25 °C.
- NAND Flash Technology: Utilizes high‑density NAND‑type flash memory with integrated ECC, defect‑block management, and wear‑leveling algorithms.
- Plug‑and‑Play Operation: No software installation required; automatically detected by any IDE‑compatible host.
- Low Power Consumption: Typical read 21 mA, write 28 mA, sleep 0.3 mA at +5 V DC.
- High Shock and Vibration Tolerance: Solid‑state design with no moving parts ensures durability in harsh environments.
- Flexible Configuration: Default master mode; slave selectable via jumper (JP1).
- Long Data Retention: Non‑volatile storage retains data ≥ 10 years without external power.
- Broad OS Support: Compatible with Windows 95/98/NT/2000/CE, Embedded NT, QNX, Linux, and other IDE‑aware operating systems.
- Compact Module Design: Vertical 44‑pin form factor minimizes footprint for space‑constrained embedded systems.
- Industrial Grade Reliability: Operating temperature 0 °C – 70 °C; non‑operating –20 °C – 85 °C; MTBF 300,000 rewrite cycles @ 25 °C.
- NAND Flash Technology: Utilizes high‑density NAND‑type flash memory with integrated ECC, defect‑block management, and wear‑leveling algorithms.
- Plug‑and‑Play Operation: No software installation required; automatically detected by any IDE‑compatible host.
- Low Power Consumption: Typical read 21 mA, write 28 mA, sleep 0.3 mA at +5 V DC.
- High Shock and Vibration Tolerance: Solid‑state design with no moving parts ensures durability in harsh environments.
- Flexible Configuration: Default master mode; slave selectable via jumper (JP1).
- Long Data Retention: Non‑volatile storage retains data ≥ 10 years without external power.
- Broad OS Support: Compatible with Windows 95/98/NT/2000/CE, Embedded NT, QNX, Linux, and other IDE‑aware operating systems.
Comprehensive Product Summary – DOM‑0128M‑44V‑426 (128 MB Disk On Module, 44‑Pin Vertical)
### 1. Product Overview
Product Name: Disk On Module (DOM)
Model Number: DOM‑0128M‑44V‑426
Series: DOM‑2000 / DG Series Industrial IDE Flash Disk
Article Number: DOM‑0128M‑44V‑426
Manufacturer: Power Quotation International Co., Ltd. (PQI) – IC Storage Specialist
Product Description:
The DOM‑0128M‑44V‑426 is a 128 MB industrial‑grade solid‑state storage module that connects directly to a 44‑pin IDE (ATA) interface in a vertical orientation. It functions as a fully compatible IDE hard‑disk replacement, providing non‑volatile NAND‑flash storage in a compact, vibration‑resistant, low‑power form factor. Designed for embedded and industrial systems, it operates reliably from 0 °C to +70 °C and is suitable for applications requiring high reliability, low heat generation, and resistance to mechanical shock.
### 2. Key Features
- True IDE Compatibility: Fully compliant with the ATA/IDE standard; recognized by BIOS as a standard hard disk without special drivers.
- Compact Module Design: Vertical 44‑pin form factor minimizes footprint for space‑constrained embedded systems.
- Industrial Grade Reliability: Operating temperature 0 °C – 70 °C; non‑operating –20 °C – 85 °C; MTBF 300,000 rewrite cycles @ 25 °C.
- NAND Flash Technology: Utilizes high‑density NAND‑type flash memory with integrated ECC, defect‑block management, and wear‑leveling algorithms.
- Plug‑and‑Play Operation: No software installation required; automatically detected by any IDE‑compatible host.
- Low Power Consumption: Typical read 21 mA, write 28 mA, sleep 0.3 mA at +5 V DC.
- High Shock and Vibration Tolerance: Solid‑state design with no moving parts ensures durability in harsh environments.
- Flexible Configuration: Default master mode; slave selectable via jumper (JP1).
- Long Data Retention: Non‑volatile storage retains data ≥ 10 years without external power.
- Broad OS Support: Compatible with Windows 95/98/NT/2000/CE, Embedded NT, QNX, Linux, and other IDE‑aware operating systems.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Capacity | 128 MB |
| Flash Type | NAND Flash Memory |
| Interface | 44‑pin IDE (2.00 mm pitch) |
| Form Factor | Vertical DOM (Plain Form) |
| Model Variant | FD128‑426P / FD128‑426PA (with housing) |
| Dimensions | Approx. 33 mm (W) × 51 mm (L) × ~6 mm (H) |
| Weight | < 10 g (typical) |
| Power Supply | +3.3 V ± 10 % or +5.0 V ± 10 % |
| Power Consumption | Read 21 mA (typ.), Write 28 mA (typ.), Sleep 0.3 mA (typ.) |
| Operating Temperature | 0 °C to +70 °C (industrial grade) |
| Storage Temperature | –20 °C to +85 °C |
| Relative Humidity | 5 % – 95 % (non‑condensing) |
| MTBF | 300,000 rewrite cycles @ 25 °C |
| Shock Resistance | 150 G (2.2 ms half‑sine) |
| Vibration Resistance | 15 G p‑p max (operating and non‑operating) |
| Sector Size | 512 bytes |
| Data Retention | ≥ 10 years |
| Connector Type | 44‑pin male IDE connector (2.00 mm pitch) |
| Default Setting | Master (JP1 On); Slave (JP1 Off) |
### 4. Functionality
Operating Principle:
The DOM‑0128M‑44V‑426 emulates a conventional IDE hard disk using NAND flash memory managed by an integrated DSP‑based controller. The controller handles logical‑to‑physical address mapping, wear‑leveling, error correction, and defect‑block substitution. Data is stored in 512‑byte sectors and transferred via the standard ATA command set.
Use Cases and Applications:
- Industrial control and automation systems
- Embedded computers and single‑board controllers
- Telecommunications equipment and routers
- Point‑of‑sale (POS) and kiosk terminals
- Transportation and vehicle data systems
- Military and aerospace embedded applications
- Medical devices and instrumentation
- Network appliances and firewalls
Compatibility:
Operates with any IDE/ATA host supporting 44‑pin connectors. Compatible with BIOS auto‑detection or manual CHS configuration. Supports PIO Mode 2 (8.3 MB/s burst). No special drivers required.
### 5. Components & Accessories
Included Items:
- DOM‑0128M‑44V‑426 module (plain form or with housing variant FD128‑426PA)
- Product label with model and serial number
Optional Accessories:
- 44‑pin to 40‑pin IDE adapter cable (FDA‑04C / FDA‑44C)
- Power adapter cable (for 40‑pin versions only)
- Mounting bracket or retention clip for vertical installation
Connectors:
- 44‑pin male IDE connector (2.00 mm pitch) with integrated power pins (+5 V on pins 41–42)
- Jumper header (JP1) for Master/Slave selection
### 6. Installation & Setup
Requirements:
- Host system with 44‑pin IDE interface (2.00 mm pitch)
- BIOS support for IDE devices ≥ 128 MB
- Power supply providing +5 V DC (±10 %) through IDE connector
Mounting Options:
- Vertical Mounting: Directly plugs into the 44‑pin IDE socket on the mainboard.
- Orientation: Pin 1 alignment must match host IDE connector marking (triangle indicator).
Configuration Procedure:
1. Power Off System before installation.
2. Insert DOM into the 44‑pin IDE socket carefully and firmly.
3. Set Master/Slave Mode: JP1 On = Master (default); JP1 Off = Slave.
4. Power On System and enter BIOS Setup.
5. BIOS Detection: Use AUTO mode or manual CHS values (C = 500, H = 16, S = 32 for 128 MB).
6. Partition and Format: Use FDISK and FORMAT utilities under DOS or OS setup tools.
Cautions:
- Ensure proper pin alignment to avoid damage.
- Use anti‑static precautions when handling.
- Do not force the module into the connector.
### 7. Performance & Capabilities
| Metric | Typical Value |
|-------------|-------------------|
| Media Transfer Rate (Read) | 2.5 MB/s (typical) |
| Media Transfer Rate (Write) | 1.2 MB/s (typical) |
| Host Burst Transfer Rate | PIO Mode 2 – 8.3 MB/s (max) |
| Average Data Transfer Rate | 6 MB/s (typical) |
| Average Seek Time | < 0.1 ms |
| Random Read Time | 0.3 ms (typical) |
| Random Write Time | 9.67 ms (typical) |
| Sequential Read Time | 0.3 ms (typical) |
| Sequential Write Time | 9.71 ms (typical) |
Performance Characteristics:
The DOM‑0128M‑44V‑426 delivers consistent throughput suitable for embedded operating systems and real‑time control applications. Its instantaneous access time (< 0.1 ms) and lack of mechanical latency make it ideal for deterministic data access. The integrated ECC engine corrects single‑word (2‑byte) errors and detects double‑word errors, ensuring data integrity even under electrical noise or vibration.
Limitations:
- Limited write endurance inherent to NAND flash (≈ 300,000 rewrite cycles).
- Not intended for high‑frequency write‑intensive applications without wear‑leveling management.
- Capacity below 256 MB may require manual BIOS CHS configuration on older systems.
### 8. Standards & Compliance
- Interface Standard: ATA/ATAPI‑4 (IDE PIO Mode 2 compliant)
- Electrical Compliance: +3.3 V / +5 V DC logic levels per ATA specification
- Environmental Compliance: Industrial temperature range (0 °C – 70 °C)
- Shock and Vibration Standards: 150 G shock, 15 G vibration tested
- EMC Compliance: Designed to meet CE and FCC Class B requirements for embedded devices
- RoHS Status: Compliant with lead‑free manufacturing standards (when specified by PQI)
- Quality Assurance: Manufactured under ISO 9001 certified processes
### 9. Additional Information
Warranty:
Standard PQI industrial DOM warranty (typically 1 year limited against defects in materials and workmanship).
Technical Support:
PQI provides technical documentation, installation guides, and engineering support for OEM and industrial customers.
Maintenance:
No mechanical parts or periodic maintenance required. Firmware is factory‑programmed and not user‑upgradable.
Firmware Features:
- Defect Block Management: Automatically reallocates bad blocks to reserved spares.
- Wear Leveling: Distributes write cycles evenly across memory cells to extend lifespan.
- ECC (Error Correction Code): Hardware and firmware integration corrects 1‑word errors and detects 2‑word errors.
- Power‑Loss Protection: If power is interrupted during programming, only the last 512 bytes may be lost; data is verified on next power‑up.
Service Life and Reliability:
- MTBF ≥ 300,000 rewrite cycles @ 25 °C
- Data retention ≥ 10 years
- No moving parts → no mechanical wear
Product Status:
Ongoing production as of March 2002 (44‑pin plain form FDxxx‑426P series).
Trademark Notice:
DiskOnModule™ and related marks are registered trademarks of Power Quotation International Co., Ltd.
### Summary of Model Designation
FDxxx‑426P / FDxxx‑426PA Series Definition:
- FD: Flash Disk (DOM and 2.5″ IDE Flash Disk family)
- xxx: Capacity code (004 = 4 MB … 128 = 128 MB … 512 = 512 MB)
- 4: 44‑pin interface
- 26: PCB width 26 mm (approx.)
- P: Plain‑form DOM
- A: With housing (optional variant)
Thus, FD128‑426P represents a 128 MB 44‑pin plain‑form vertical DOM, and FD128‑426PA the same module with protective housing.
### 10. Summary of Electrical Interface (Pin Assignments)
44‑Pin IDE Connector (2.00 mm Pitch):
| Pin | Signal | Pin | Signal |
|----------|-------------|----------|-------------|
| 1 | RESET‑ | 2 | GND |
| 3 | DD7 | 4 | DD8 |
| 5 | DD6 | 6 | DD9 |
| 7 | DD5 | 8 | DD10 |
| 9 | DD4 | 10 | DD11 |
| 11 | DD3 | 12 | DD12 |
| 13 | DD2 | 14 | DD13 |
| 15 | DD1 | 16 | DD14 |
| 17 | DD0 | 18 | DD15 |
| 19 | GND | 20 | Key (+5 V optional) |
| 21 | DMARQ | 22 | GND |
| 23 | DIOW‑ | 24 | GND |
| 25 | DIOR‑ | 26 | GND |
| 27 | IORDY | 28 | CSEL |
| 29 | DMACK‑ | 30 | GND |
| 31 | INTRQ | 32 | Reserved |
| 33 | DA1 | 34 | PDIAG‑ |
| 35 | DA0 | 36 | DA2 |
| 37 | CS0‑ | 38 | CS1‑ |
| 39 | DASP‑ | 40 | GND |
| 41 | +5 V (logic) | 42 | +5 V (motor) |
| 43 | GND (return) | 44 | TYPE‑ (0 = ATA) |
### 11. Internal Architecture and Flash Management
Controller Architecture:
- DSP‑based flash controller with IDE interface logic
- Integrated buffer RAM for data transfer and command processing
- Firmware manages logical block addressing (LBA) and defect replacement
Flash Management Algorithms:
- Defect Management: Reserved blocks replace failed cells automatically.
- Wear Leveling: Distributes writes across all blocks to maximize endurance.
- ECC: Hardware correction of 1‑word errors (2 bytes), detection of 2‑word errors.
- Power‑Failure Recovery: Protects data integrity during unexpected shutdowns.
### 12. Physical Outline and Mechanical Data
- Form Factor: Vertical 44‑pin DOM (plain PCB or housed version)
- Approximate Dimensions: 33 mm × 51 mm × 6 mm
- Mounting: Direct plug‑in to motherboard IDE connector; no cable required.
- Orientation: Vertical mount perpendicular to PCB plane.
- Material: FR‑4 PCB with gold‑plated connector contacts; optional ABS housing for FDxxx‑426PA.
### 13. Reliability and Environmental Characteristics
| Parameter | Value |
|----------------|-----------|
| Operating Temperature Range | 0 °C – 70 °C (industrial grade) |
| Non‑Operating Temperature | –20 °C – 85 °C |
| Shock Resistance | 150 G (2.2 ms half‑sine) |
| Vibration Resistance | 15 G p‑p max |
| Humidity Tolerance | 5 % – 95 % RH (non‑condensing) |
| MTBF | ≥ 300,000 rewrite cycles @ 25 °C |
| Data Retention | ≥ 10 years |
| Error Rate | < 10⁻²⁰ with ECC enabled |
### 14. Ordering Information
| Capacity | Plain Form (Without Housing) | With Housing |
|---------------|----------------------------------|------------------|
| 128 MB | FD128‑426P | FD128‑426PA |
Product Status: Ongoing production (44‑pin plain form FDxxx‑426P series).
### 15. Summary of Advantages
- Compact solid‑state design for embedded applications
- High reliability and data integrity through ECC and wear leveling
- Low power draw for battery‑powered or fanless systems
- Plug‑and‑play installation with standard IDE interface
- Long service life and data retention without maintenance
- Resistant to shock, vibration, and temperature fluctuations
### 16. Typical Applications
- Industrial automation controllers and PLC systems
- Embedded PC/104 and SBC platforms
- Telecom switches and routers
- Kiosk and POS terminals
- Transportation and vehicle data loggers
- Medical and laboratory equipment
- Defense and aerospace embedded computers
- Network security appliances and firewalls
### 17. Compliance and Quality Assurance
- Manufactured under ISO 9001 quality system
- Conforms to ATA/ATAPI interface standards
- Meets industrial environmental specifications
- RoHS and lead‑free compliant (when specified)
- All specifications subject to change without notice per PQI policy
### 18. Warranty and Support
- Warranty Period: 1 year limited manufacturer warranty
- Support Services: Technical documentation, OEM integration assistance, and lifetime product support through PQI authorized channels.
- Maintenance: No user serviceable parts; routine data backup recommended for write‑intensive applications.
### 19. Summary Statement
The PQI DOM‑0128M‑44V‑426 represents a robust, industrial‑grade solid‑state storage solution engineered for embedded and mission‑critical environments. Its 44‑pin IDE interface ensures seamless integration with legacy and modern systems, while NAND flash technology provides silent, low‑power, and shock‑resistant operation. With integrated ECC, wear‑leveling, and defect‑management firmware, the module guarantees data integrity and extended service life. Compact vertical design, plug‑and‑play functionality, and broad operating‑system compatibility make it an ideal replacement for mechanical hard drives in industrial control, telecommunications, and embedded computing applications.
End of Technical Summary – DOM‑0128M‑44V‑426
### 1. Product Overview
Product Name: Disk On Module (DOM)
Model Number: DOM‑0128M‑44V‑426
Series: DOM‑2000 / DG Series Industrial IDE Flash Disk
Article Number: DOM‑0128M‑44V‑426
Manufacturer: Power Quotation International Co., Ltd. (PQI) – IC Storage Specialist
Product Description:
The DOM‑0128M‑44V‑426 is a 128 MB industrial‑grade solid‑state storage module that connects directly to a 44‑pin IDE (ATA) interface in a vertical orientation. It functions as a fully compatible IDE hard‑disk replacement, providing non‑volatile NAND‑flash storage in a compact, vibration‑resistant, low‑power form factor. Designed for embedded and industrial systems, it operates reliably from 0 °C to +70 °C and is suitable for applications requiring high reliability, low heat generation, and resistance to mechanical shock.
### 2. Key Features
- True IDE Compatibility: Fully compliant with the ATA/IDE standard; recognized by BIOS as a standard hard disk without special drivers.
- Compact Module Design: Vertical 44‑pin form factor minimizes footprint for space‑constrained embedded systems.
- Industrial Grade Reliability: Operating temperature 0 °C – 70 °C; non‑operating –20 °C – 85 °C; MTBF 300,000 rewrite cycles @ 25 °C.
- NAND Flash Technology: Utilizes high‑density NAND‑type flash memory with integrated ECC, defect‑block management, and wear‑leveling algorithms.
- Plug‑and‑Play Operation: No software installation required; automatically detected by any IDE‑compatible host.
- Low Power Consumption: Typical read 21 mA, write 28 mA, sleep 0.3 mA at +5 V DC.
- High Shock and Vibration Tolerance: Solid‑state design with no moving parts ensures durability in harsh environments.
- Flexible Configuration: Default master mode; slave selectable via jumper (JP1).
- Long Data Retention: Non‑volatile storage retains data ≥ 10 years without external power.
- Broad OS Support: Compatible with Windows 95/98/NT/2000/CE, Embedded NT, QNX, Linux, and other IDE‑aware operating systems.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Capacity | 128 MB |
| Flash Type | NAND Flash Memory |
| Interface | 44‑pin IDE (2.00 mm pitch) |
| Form Factor | Vertical DOM (Plain Form) |
| Model Variant | FD128‑426P / FD128‑426PA (with housing) |
| Dimensions | Approx. 33 mm (W) × 51 mm (L) × ~6 mm (H) |
| Weight | < 10 g (typical) |
| Power Supply | +3.3 V ± 10 % or +5.0 V ± 10 % |
| Power Consumption | Read 21 mA (typ.), Write 28 mA (typ.), Sleep 0.3 mA (typ.) |
| Operating Temperature | 0 °C to +70 °C (industrial grade) |
| Storage Temperature | –20 °C to +85 °C |
| Relative Humidity | 5 % – 95 % (non‑condensing) |
| MTBF | 300,000 rewrite cycles @ 25 °C |
| Shock Resistance | 150 G (2.2 ms half‑sine) |
| Vibration Resistance | 15 G p‑p max (operating and non‑operating) |
| Sector Size | 512 bytes |
| Data Retention | ≥ 10 years |
| Connector Type | 44‑pin male IDE connector (2.00 mm pitch) |
| Default Setting | Master (JP1 On); Slave (JP1 Off) |
### 4. Functionality
Operating Principle:
The DOM‑0128M‑44V‑426 emulates a conventional IDE hard disk using NAND flash memory managed by an integrated DSP‑based controller. The controller handles logical‑to‑physical address mapping, wear‑leveling, error correction, and defect‑block substitution. Data is stored in 512‑byte sectors and transferred via the standard ATA command set.
Use Cases and Applications:
- Industrial control and automation systems
- Embedded computers and single‑board controllers
- Telecommunications equipment and routers
- Point‑of‑sale (POS) and kiosk terminals
- Transportation and vehicle data systems
- Military and aerospace embedded applications
- Medical devices and instrumentation
- Network appliances and firewalls
Compatibility:
Operates with any IDE/ATA host supporting 44‑pin connectors. Compatible with BIOS auto‑detection or manual CHS configuration. Supports PIO Mode 2 (8.3 MB/s burst). No special drivers required.
### 5. Components & Accessories
Included Items:
- DOM‑0128M‑44V‑426 module (plain form or with housing variant FD128‑426PA)
- Product label with model and serial number
Optional Accessories:
- 44‑pin to 40‑pin IDE adapter cable (FDA‑04C / FDA‑44C)
- Power adapter cable (for 40‑pin versions only)
- Mounting bracket or retention clip for vertical installation
Connectors:
- 44‑pin male IDE connector (2.00 mm pitch) with integrated power pins (+5 V on pins 41–42)
- Jumper header (JP1) for Master/Slave selection
### 6. Installation & Setup
Requirements:
- Host system with 44‑pin IDE interface (2.00 mm pitch)
- BIOS support for IDE devices ≥ 128 MB
- Power supply providing +5 V DC (±10 %) through IDE connector
Mounting Options:
- Vertical Mounting: Directly plugs into the 44‑pin IDE socket on the mainboard.
- Orientation: Pin 1 alignment must match host IDE connector marking (triangle indicator).
Configuration Procedure:
1. Power Off System before installation.
2. Insert DOM into the 44‑pin IDE socket carefully and firmly.
3. Set Master/Slave Mode: JP1 On = Master (default); JP1 Off = Slave.
4. Power On System and enter BIOS Setup.
5. BIOS Detection: Use AUTO mode or manual CHS values (C = 500, H = 16, S = 32 for 128 MB).
6. Partition and Format: Use FDISK and FORMAT utilities under DOS or OS setup tools.
Cautions:
- Ensure proper pin alignment to avoid damage.
- Use anti‑static precautions when handling.
- Do not force the module into the connector.
### 7. Performance & Capabilities
| Metric | Typical Value |
|-------------|-------------------|
| Media Transfer Rate (Read) | 2.5 MB/s (typical) |
| Media Transfer Rate (Write) | 1.2 MB/s (typical) |
| Host Burst Transfer Rate | PIO Mode 2 – 8.3 MB/s (max) |
| Average Data Transfer Rate | 6 MB/s (typical) |
| Average Seek Time | < 0.1 ms |
| Random Read Time | 0.3 ms (typical) |
| Random Write Time | 9.67 ms (typical) |
| Sequential Read Time | 0.3 ms (typical) |
| Sequential Write Time | 9.71 ms (typical) |
Performance Characteristics:
The DOM‑0128M‑44V‑426 delivers consistent throughput suitable for embedded operating systems and real‑time control applications. Its instantaneous access time (< 0.1 ms) and lack of mechanical latency make it ideal for deterministic data access. The integrated ECC engine corrects single‑word (2‑byte) errors and detects double‑word errors, ensuring data integrity even under electrical noise or vibration.
Limitations:
- Limited write endurance inherent to NAND flash (≈ 300,000 rewrite cycles).
- Not intended for high‑frequency write‑intensive applications without wear‑leveling management.
- Capacity below 256 MB may require manual BIOS CHS configuration on older systems.
### 8. Standards & Compliance
- Interface Standard: ATA/ATAPI‑4 (IDE PIO Mode 2 compliant)
- Electrical Compliance: +3.3 V / +5 V DC logic levels per ATA specification
- Environmental Compliance: Industrial temperature range (0 °C – 70 °C)
- Shock and Vibration Standards: 150 G shock, 15 G vibration tested
- EMC Compliance: Designed to meet CE and FCC Class B requirements for embedded devices
- RoHS Status: Compliant with lead‑free manufacturing standards (when specified by PQI)
- Quality Assurance: Manufactured under ISO 9001 certified processes
### 9. Additional Information
Warranty:
Standard PQI industrial DOM warranty (typically 1 year limited against defects in materials and workmanship).
Technical Support:
PQI provides technical documentation, installation guides, and engineering support for OEM and industrial customers.
Maintenance:
No mechanical parts or periodic maintenance required. Firmware is factory‑programmed and not user‑upgradable.
Firmware Features:
- Defect Block Management: Automatically reallocates bad blocks to reserved spares.
- Wear Leveling: Distributes write cycles evenly across memory cells to extend lifespan.
- ECC (Error Correction Code): Hardware and firmware integration corrects 1‑word errors and detects 2‑word errors.
- Power‑Loss Protection: If power is interrupted during programming, only the last 512 bytes may be lost; data is verified on next power‑up.
Service Life and Reliability:
- MTBF ≥ 300,000 rewrite cycles @ 25 °C
- Data retention ≥ 10 years
- No moving parts → no mechanical wear
Product Status:
Ongoing production as of March 2002 (44‑pin plain form FDxxx‑426P series).
Trademark Notice:
DiskOnModule™ and related marks are registered trademarks of Power Quotation International Co., Ltd.
### Summary of Model Designation
FDxxx‑426P / FDxxx‑426PA Series Definition:
- FD: Flash Disk (DOM and 2.5″ IDE Flash Disk family)
- xxx: Capacity code (004 = 4 MB … 128 = 128 MB … 512 = 512 MB)
- 4: 44‑pin interface
- 26: PCB width 26 mm (approx.)
- P: Plain‑form DOM
- A: With housing (optional variant)
Thus, FD128‑426P represents a 128 MB 44‑pin plain‑form vertical DOM, and FD128‑426PA the same module with protective housing.
### 10. Summary of Electrical Interface (Pin Assignments)
44‑Pin IDE Connector (2.00 mm Pitch):
| Pin | Signal | Pin | Signal |
|----------|-------------|----------|-------------|
| 1 | RESET‑ | 2 | GND |
| 3 | DD7 | 4 | DD8 |
| 5 | DD6 | 6 | DD9 |
| 7 | DD5 | 8 | DD10 |
| 9 | DD4 | 10 | DD11 |
| 11 | DD3 | 12 | DD12 |
| 13 | DD2 | 14 | DD13 |
| 15 | DD1 | 16 | DD14 |
| 17 | DD0 | 18 | DD15 |
| 19 | GND | 20 | Key (+5 V optional) |
| 21 | DMARQ | 22 | GND |
| 23 | DIOW‑ | 24 | GND |
| 25 | DIOR‑ | 26 | GND |
| 27 | IORDY | 28 | CSEL |
| 29 | DMACK‑ | 30 | GND |
| 31 | INTRQ | 32 | Reserved |
| 33 | DA1 | 34 | PDIAG‑ |
| 35 | DA0 | 36 | DA2 |
| 37 | CS0‑ | 38 | CS1‑ |
| 39 | DASP‑ | 40 | GND |
| 41 | +5 V (logic) | 42 | +5 V (motor) |
| 43 | GND (return) | 44 | TYPE‑ (0 = ATA) |
### 11. Internal Architecture and Flash Management
Controller Architecture:
- DSP‑based flash controller with IDE interface logic
- Integrated buffer RAM for data transfer and command processing
- Firmware manages logical block addressing (LBA) and defect replacement
Flash Management Algorithms:
- Defect Management: Reserved blocks replace failed cells automatically.
- Wear Leveling: Distributes writes across all blocks to maximize endurance.
- ECC: Hardware correction of 1‑word errors (2 bytes), detection of 2‑word errors.
- Power‑Failure Recovery: Protects data integrity during unexpected shutdowns.
### 12. Physical Outline and Mechanical Data
- Form Factor: Vertical 44‑pin DOM (plain PCB or housed version)
- Approximate Dimensions: 33 mm × 51 mm × 6 mm
- Mounting: Direct plug‑in to motherboard IDE connector; no cable required.
- Orientation: Vertical mount perpendicular to PCB plane.
- Material: FR‑4 PCB with gold‑plated connector contacts; optional ABS housing for FDxxx‑426PA.
### 13. Reliability and Environmental Characteristics
| Parameter | Value |
|----------------|-----------|
| Operating Temperature Range | 0 °C – 70 °C (industrial grade) |
| Non‑Operating Temperature | –20 °C – 85 °C |
| Shock Resistance | 150 G (2.2 ms half‑sine) |
| Vibration Resistance | 15 G p‑p max |
| Humidity Tolerance | 5 % – 95 % RH (non‑condensing) |
| MTBF | ≥ 300,000 rewrite cycles @ 25 °C |
| Data Retention | ≥ 10 years |
| Error Rate | < 10⁻²⁰ with ECC enabled |
### 14. Ordering Information
| Capacity | Plain Form (Without Housing) | With Housing |
|---------------|----------------------------------|------------------|
| 128 MB | FD128‑426P | FD128‑426PA |
Product Status: Ongoing production (44‑pin plain form FDxxx‑426P series).
### 15. Summary of Advantages
- Compact solid‑state design for embedded applications
- High reliability and data integrity through ECC and wear leveling
- Low power draw for battery‑powered or fanless systems
- Plug‑and‑play installation with standard IDE interface
- Long service life and data retention without maintenance
- Resistant to shock, vibration, and temperature fluctuations
### 16. Typical Applications
- Industrial automation controllers and PLC systems
- Embedded PC/104 and SBC platforms
- Telecom switches and routers
- Kiosk and POS terminals
- Transportation and vehicle data loggers
- Medical and laboratory equipment
- Defense and aerospace embedded computers
- Network security appliances and firewalls
### 17. Compliance and Quality Assurance
- Manufactured under ISO 9001 quality system
- Conforms to ATA/ATAPI interface standards
- Meets industrial environmental specifications
- RoHS and lead‑free compliant (when specified)
- All specifications subject to change without notice per PQI policy
### 18. Warranty and Support
- Warranty Period: 1 year limited manufacturer warranty
- Support Services: Technical documentation, OEM integration assistance, and lifetime product support through PQI authorized channels.
- Maintenance: No user serviceable parts; routine data backup recommended for write‑intensive applications.
### 19. Summary Statement
The PQI DOM‑0128M‑44V‑426 represents a robust, industrial‑grade solid‑state storage solution engineered for embedded and mission‑critical environments. Its 44‑pin IDE interface ensures seamless integration with legacy and modern systems, while NAND flash technology provides silent, low‑power, and shock‑resistant operation. With integrated ECC, wear‑leveling, and defect‑management firmware, the module guarantees data integrity and extended service life. Compact vertical design, plug‑and‑play functionality, and broad operating‑system compatibility make it an ideal replacement for mechanical hard drives in industrial control, telecommunications, and embedded computing applications.
End of Technical Summary – DOM‑0128M‑44V‑426
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