Comprehensive Product Summary – PQI DiskOnModule DJ Series, Model DOM‑0256M‑40V‑019

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### 1. Product Overview

Product Name: DiskOnModule™ 256 MB IDE Flash Disk
Model Number: DOM‑0256M‑40V‑019
Series: DJ Series (Industrial Grade)
Article Number: DOM‑0256M‑40V‑019
Manufacturer: Power Quotient International Co., Ltd. (PQI) – IC Storage Specialist
Product Type: Solid‑state Disk‑on‑Module (DOM), 40‑pin vertical IDE interface
Form Factor: 40‑pin vertical plug‑in module, plain‑formed (P‑type)
Intended Use: Industrial and embedded systems requiring compact, non‑volatile IDE storage

The PQI DOM‑0256M‑40V‑019 is a 256 MB solid‑state storage module designed as a direct IDE hard‑disk replacement. It uses NAND‑type flash memory and a proprietary flash controller to emulate a standard ATA/IDE hard drive. The module is part of PQI’s DJ Series, engineered for industrial environments and embedded applications where vibration resistance, low power consumption, and long‑term data retention are critical.

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### 2. Key Features

- True IDE Compatibility: Fully compliant with the ATA/IDE standard, operating as a 100 % HDD‑compatible device in True IDE mode.
- Plug‑and‑Play Operation: No special drivers or firmware required; recognized by BIOS as a standard hard disk.
- NAND Flash Technology: Utilizes high‑density NAND flash for non‑volatile storage with a minimum 10‑year data retention period.
- Industrial‑Grade Reliability: Rated for 0 °C – 70 °C operation, with optional wide‑temperature versions (‑40 °C – 80 °C).
- High Shock Resistance: Withstands up to 1000 G operating and non‑operating shock.
- Low Power Consumption: Typical read current 30 mA, write 28 mA, standby 3 mA.
- Error Correction Code (ECC): Hardware ECC corrects 22 bits per 256 bytes, ensuring data integrity.
- Flash Management Algorithms: Built‑in wear‑leveling, defect block management, and reserved block substitution extend flash life.
- Broad OS Support: Compatible with DOS, Windows 95/98/NT/2000/XP, Windows CE, Linux, QNX, and embedded operating systems.
- Compact Design: Vertical 40‑pin form factor minimizes footprint for space‑constrained systems.
- Long MTBF: Mean Time Between Failures rated at 1,000,000 hours.
- Capacities Available: 16 MB – 1.5 GB (this model: 256 MB).
- No Moving Parts: Silent operation, vibration‑proof, and maintenance‑free.

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### 3. Technical Specifications

Capacity: 256 MB (unformatted 512,000 sectors, 512 bytes per sector)
Interface: 40‑pin IDE (2.54 mm pitch), vertical orientation
Flash Type: NAND‑type solid‑state memory
Sector Size: 512 bytes
Form Factor: Plain‑formed vertical module (P‑type)
Dimensions:
- Height: 35.0 mm (for 48 MB – 256 MB models)
- Width: 55.4 mm
- Thickness: 8.2 mm
Weight: Approx. 10 – 15 g (typical for 40‑pin DOM)
Material: PCB assembly with integrated flash ICs and IDE connector

Environmental Ratings:
- Operating Temperature (Industrial): 0 °C – 70 °C
- Non‑Operating Temperature: ‑40 °C – 85 °C
- Optional Wide‑Temperature Version: ‑40 °C – 80 °C operating, ‑55 °C – 95 °C non‑operating
- Relative Humidity: 8 % – 95 % (non‑condensing)
- Shock: 1000 G (operating and non‑operating)

Electrical Characteristics:
- Supply Voltage: +3.3 V ± 5 % or +5.0 V ± 10 %
- Power Consumption:
- Read: 30 mA (typ.)
- Write: 28 mA (typ.)
- Standby: 3 mA (typ.)

Performance:
- Media Transfer Rate: Read 4.3 MB/s (typ.), Write 3.3 MB/s (typ.)
- Interface Burst Rate: PIO Mode 2 – 8.3 MB/s
- Average Seek Time: < 0.1 ms
- Random Read Time: ≈ 0.3 ms
- Random Write Time: ≈ 9.7 ms
- Sequential Read Time: ≈ 0.3 ms
- Sequential Write Time: ≈ 9.7 ms

Reliability:
- MTBF: 1,000,000 hours
- ECC: 22 bits per 256 bytes
- Data Retention: ≥ 10 years
- Endurance: > 300,000 rewrite cycles @ 25 °C

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### 4. Functionality

The DOM‑0256M‑40V‑019 functions as a solid‑state IDE hard drive. It connects directly to a 40‑pin IDE connector on a motherboard or controller card. The module’s internal controller manages flash translation, wear‑leveling, and ECC correction, presenting a standard ATA interface to the host system.

Operation Principle:
- The host system communicates with the DOM via standard ATA commands.
- The internal controller translates logical block addresses (LBA) to physical flash memory locations.
- ECC and defect management ensure reliable data storage and retrieval.
- Reserved flash blocks automatically replace defective cells to maintain integrity.
- The module supports both PIO and DMA transfer modes (PIO Mode 2 default).

Use Cases and Applications:
- Industrial PCs and embedded controllers
- Data acquisition and automation systems
- Networking equipment (routers, gateways, firewalls)
- Kiosks, POS terminals, and ticketing machines
- Transportation and vehicle systems
- Military and avionics systems
- Compact or fanless computing platforms

Compatibility:
- Fully compatible with IDE/ATA standards
- Works with BIOS auto‑detection or manual CHS configuration
- Supports all major operating systems without additional drivers

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### 5. Components & Accessories

Included Components:
- DOM‑0256M‑40V‑019 module (256 MB, 40‑pin vertical)
- 4‑pin power cable (for systems without +5 V on IDE pin 20)
- Installation and configuration guide

Optional Accessories:
- 40‑pin to 44‑pin IDE adapter cables
- Mounting brackets or retention clips for vertical installation
- Jumper or ring plug for Master/Slave configuration (depending on power connector type)

Connectors:
- 40‑pin IDE male connector (2.54 mm pitch)
- 4‑pin power connector (Molex‑type) for +5 V input
- Pin 1 indicated by triangle marking for alignment

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### 6. Installation & Setup

Pre‑Installation Precautions:
- Use anti‑static protection (grounded wrist strap).
- Ensure system power is off before installation.

Installation Steps:
1. Open the computer chassis and locate the 40‑pin IDE slot.
2. Align pin 1 on the DOM (triangle mark) with pin 1 on the IDE connector.
3. Insert the DOM vertically into the IDE socket.
4. Connect the 4‑pin power cable to an unused power connector (if IDE pin 20 does not supply +5 V).
5. Verify all connections and close the chassis.

BIOS Configuration:
- Enter BIOS setup during boot (DELETE/ESC/F1).
- Enable “Auto” drive detection or manually enter CHS values:
- Cylinders = 1000, Heads = 16, Sectors = 32 (for 256 MB).
- Save and reboot.

Partitioning and Formatting:
- Boot from a DOS diskette.
- Use FDISK.EXE to create partitions.
- Format using FORMAT C:/S to make the drive bootable.
- After formatting, the DOM is ready for use.

Master/Slave Configuration:
- For 40‑pin DOMs, Master/Slave is set via power cable connectors:
- White connector = Master (default)
- Blue connector = Slave
- If IDE pin 20 provides +5 V (no external power cable), a removable ring plug sets Master/Slave:
- Ring inserted = Master
- Ring removed = Slave

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### 7. Performance & Capabilities

Speed and Throughput:
- Sequential Read: 4.3 MB/s (typ.)
- Sequential Write: 3.3 MB/s (typ.)
- Host Burst Rate: 8.3 MB/s (PIOMode 2)
- Access Time: < 0.1 ms average

Capacity and Addressing:
- Logical CHS: 1000 Cylinders × 16 Heads × 32 Sectors = 512,000 sectors
- Sector Size: 512 bytes
- Supports both CHS and LBA addressing modes

Efficiency:
- Low power draw enables use in fanless or battery‑powered systems.
- No mechanical latency or seek delay.
- Instant‑on capability for embedded boot devices.

Limitations:
- Write endurance limited by flash cell life (mitigated by wear‑leveling).
- Performance dependent on host IDE controller and PIO mode.
- Not hot‑swappable; power must be off during installation/removal.

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### 8. Standards & Compliance

Interface Standards:
- ATA/ATAPI‑4 (IDE) compliant
- PIO Mode 0–2 supported (Mode 2 default)
- DMA handshake signals (DMARQ/DMACK‑) supported

Electrical & Mechanical Standards:
- 40‑pin 2.54 mm IDE connector per ATA specification
- 5 V logic‑level signaling

Environmental & Reliability Standards:
- Industrial operating temperature range (0 °C – 70 °C)
- Shock and vibration resistance per PQI industrial specification (1000 G)
- Humidity tolerance 8 % – 95 % RH (non‑condensing)

Regulatory Compliance:
- RoHS compliant (lead‑free manufacturing)
- CE and FCC Class B (typical for PQI industrial modules)
- PQI internal quality certification ISO 9001/14001

Data Integrity Standards:
- ECC 22 bits / 256 bytes
- Flash management with reserved block substitution and wear‑leveling

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### 9. Additional Information

Warranty:
- Standard PQI industrial warranty (typically 1 – 3 years depending on region and application).

Support & Maintenance:
- Technical support via PQI or authorized distributors.
- Firmware updates provided for controller enhancements when applicable.
- Maintenance‑free operation; no moving parts or lubrication required.

Service Life:
- MTBF = 1,000,000 hours
- Data retention ≥ 10 years
- Endurance ≈ 300,000 rewrite cycles @ 25 °C

Product Family Compatibility:
- Part of PQI’s DJ Series (16 MB – 1.5 GB range).
- Related models: FDxxx‑019P (plain 40‑pin), FDxxx‑026P (wider PCB), FDxxx‑030LXX (L‑form).
- Available in 40‑pin and 44‑pin configurations, vertical or L‑shaped.

Ordering Information:
- DOM‑0256M‑40V‑019 = 256 MB, 40‑pin vertical, plain‑form, industrial grade (0 – 70 °C).
- Other capacities: 16 MB, 32 MB, 64 MB, 128 MB, 192 MB, 512 MB, 1 GB, 1.5 GB.

Manufacturer Contact:
Power Quotient International Co., Ltd. (PQI)
IC Storage Specialist Division
Taipei, Taiwan
Website: [pqi.com.tw](https://www.pqi.com.tw)

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### Summary

The PQI DOM‑0256M‑40V‑019 is a compact, industrial‑grade 256 MB Disk‑on‑Module designed for embedded and industrial computing environments. It provides a solid‑state alternative to mechanical IDE hard drives, offering high reliability, low power consumption, and full IDE compatibility. With its NAND flash architecture, integrated ECC, and advanced flash management algorithms, the module ensures long‑term data integrity and endurance. Its vertical 40‑pin form factor allows direct motherboard installation without cables, making it ideal for space‑limited systems such as industrial controllers, kiosks, and embedded PCs.

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Key Technical Summary Table

| Parameter | Specification |
|------------|---------------|
| Model | DOM‑0256M‑40V‑019 |
| Capacity | 256 MB |
| Interface | 40‑pin IDE (2.54 mm) |
| Orientation | Vertical |
| Flash Type | NAND |
| Operating Temp | 0 °C – 70 °C |
| Non‑Operating Temp | ‑40 °C – 85 °C |
| Voltage | +3.3 V ± 5 % / +5 V ± 10 % |
| Read Speed | 4.3 MB/s |
| Write Speed | 3.3 MB/s |
| PIO Mode | Mode 2 (8.3 MB/s burst) |
| ECC | 22 bits / 256 bytes |
| MTBF | 1,000,000 hours |
| Shock | 1000 G |
| Humidity | 8 % – 95 % RH |
| Power (Read/Write/Standby) | 30 mA / 28 mA / 3 mA |
| Dimensions | 35 × 55.4 × 8.2 mm |
| Weight | ≈ 10–15 g |
| Compliance | ATA/IDE, RoHS, CE/FCC |
| Warranty | 1–3 years (region dependent) |

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In essence, the DOM‑0256M‑40V‑019 delivers a rugged, maintenance‑free, and fully IDE‑compatible solid‑state storage solution optimized for industrial and embedded computing platforms where reliability, compactness, and endurance are paramount.