The Newest model: New Generation Automatic True USB Willem PRO 40pin Universal Programmer Set Eprom programmer, Willem programmer

(Hardware version: GQ-4X4; latest GQUSBprog software version)

You are purchasing directly from the developer & manufacturer of True USB Willem universal programmer series: better pricing and better support. 

Supported Device List Click Here

GQ programmer GQ-4x4 User Guide

Video on GQ-4x4 USB driver and software installation for Windows 10

GQ-4X4 is the newest model of True USB Willem Universal Programmer series from MCUmall Electronics Inc Canada.

With its complete new professional design, True USB PRO 40pin Willem programmer GQ-4X is the first & exclusive Willem universal programmer in the market that owns the unique features:

  • Neat robust enclosure; 40pin ZIF socket, fully automatic; JTAG support; Fast mode SPI support;
  • Support O/S: Windows XP,Vista,7,8,8.1,10, 11 32bit/64bit; 
  • Real True USB interface for both data transfer and power supply;
  • High speed/fastest; most-user-friendly; simplest-to-use;
  • Software update regularly; free lifetime software upgrade/download;
  • Multi-languages support capability: Chinese, Czech, English, French, German, Spanish, Portugues   

The application-oriented & application-enhanced design facilitates GQ-4X4 supports thousands of most popular application devices (growing) and ideally suits the portable/convenient applications that includes: car automotive field ECU chip tuning, airbag reset, mileage, satellite devices, BIOS refreshing, motherboard BIOS in-circuit upgrade, xBox,Wii gaming machines EPROM duplicate, Altera Xilinx JTAG, PIC/MCU development, newer laptop technology and newer desktop PC etc.

It has an outstanding performance which supports the devices that other similar products are not capable of supporting: such as 25LF SPI series, PSOP44, TSOP48, 25VF SPI series, Altera Xilinx CPLD JTAG, PLCC84, SST39VF3201, TE28F102, 27C1024, 27C1028, HD6475,29F800, 29LV800, 29F032...

Key & Unique Features

1. Complete new professional design with own robust enclosure and 40pin ZIF socket

  • The neat robust enclosure is designed to suit the portable and field convenient applications
  • 40 pin of the ZIF socket supports more chips without the adapter
  • First and only Willem programmer with 40pin ZIF socket, other models use 32pin ZIF
  • The software & hardware are Designed/developed by MCUmall Electronics Inc. Canada
  • Assembled in Canada and post-sales support by MCUmall Electronics Inc.

2. Fully automatic & no manual set-up needed (eliminate all jumpers & DIP-switch)

  • Fully automatic for efficient use and extends the programmer lifetime
  • Eliminates all jumpers on board, manual set-up for jumpers is no longer needed (all non-USB willem use jumpers: 16 jumpers on PCB5.0C, 48 jumpers on willem 1.5)
  • Eliminate the onboard DIP switch, manual set-up for DIP switch is no longer needed.
  • This also makes much easier & very simple to use for end users.
  • Plug-and-play reduces the learning curve and save you precious time.

3. Fast mode SPI programming & JTAG support wider the application

  • Useful for motherboard BIOS in-circuit upgrade
  • Altera Xilinx CPLD JTAG support

4. True USB data transfer interface with PC/LapTop for newer laptop use as well as portable application

  • Uses only one USB cable to connect with PC/Laptop USB port for both data transfer and power supply. The bulky DB25 data cable is eliminated & no longer needed for data transfer between PC and programmer board
  • It is True/Real USB data transmission protocol (USB-USB), Not via Fake/Pseudo-USB data communication.
  • Fake/Pseudo USB data transfer needs the middle serial or parallel port conversion: USB-Serial-USB conversion or LPT-USB conversion, this limits the programming speed significantly.
  • GQ-4X4 features the same revolutionary data interface as GQ-3X, the True USB data transmission with PC/LapTop.

5. Exponentially speed increase up to 20 times faster

  • Connects PC via a high-speed USB link, provides the fastest possible data transfer rates for programming/reading data from target IC's.
  • It is capable of being up to 20 times faster than other existing printer port willem (parallel LPT willems: PCB6.xx, PCB5.0C, PCB4.5C) programmers on reading & verification a high-density flash device, this significantly saves your time and increases work efficiency as well as facilitates small scale production
  • Assembly language written programming algorithms run fast and reliable. Not affected by the PC speed changes and Windows O/S variations.

6. Dual power supply capability: USB port & AC/DC and automatic voltage control

  • Vcc supported among 3.6V, 5V, 5.5V, 6.5V
  • On-Board MCU for stable performance & automatic/accurate voltage control
  • Works best among other programmers for EPROMs

7. The GQUSB software is specially developed for True USB willem programmers GQ-4X,GQ-3X, GQ-2X.

  • Free Lifetime software download/upgrade, please click here for software revision history
  • Updates software and device algorithm regularly
  • Free IC device updates via web
  • Supports O/S: WinXP 64bit, Vista 32bit, Vista 64bit Windows7 32bit 64bit, Windows 8 32bit 64bit, Windows 8.1 32bit 64bit, Windows 10 32bit 64bit, Windows 11 32bit 64bit      
  • Advanced software engineered to provide most user-friendly interface & simplest and easiest-to-use Willem programmer version to save time and comfort to use
  • Multi-language support, such as: English, German, Spanish, Chinese, French, Cezh, Portugues
  • Programming history memory function on-board
  • Supports most popular ECU, Satellite,xBox, Wii, BIOS, EPROM chips: SST39VF3201, TE28F102, 27C1024, 29F800, 29LV800...
  • Supports the chips that LPT Willem are not capable of supporting, like 24RF08,28F102,87C257 and more
  • Supports TSOP48, PSOP44,16bit EPROM chips that 40 pin TOP, EasyPro, Wellon are not capable of supporting
  • Supports 25LF SPI series, 25VF SPI series, Altera Xilinx CPLD JTAG, PLCC84,29F032...
  • Allows end users to add in their own chips/devices easily (editing .txt file)

8. Working with the adapters further expands the supported devices list

  • Accommodate the existing adapters (GQ-3X/2X and parallel LPT willem adapter)
  • Packaging supported: TSOP48 (16bit & 8 bit), TSOP32, PSOP44, DIP8 to DIP40, PLCC, SOP,SOIC, MCS-51+, PLCC84, and etc.

9. Covers the widest application areas among all Willem programmers

  • Car/automotive ECU chip tuning, airbag reset, mileage, memory device code read/write/program
  • Satellite large capacity device applications
  • On-spot/Field/portable applications & Small scale production
  • Motherboard BIOS in-circuit upgrading
  • Xbox, Wii gaming chip freshing & upgrading
  • PIC & MCU programming & development
  • Duplicate EPROM chips & Game machine repairing
  • Copier/Fax machine/printer main board repairing
  • VCD,DVD, color TV maintaining& repairing

10. programmers comparison

Intellectual property owner of USB Willem Programmer MCUmall True USB GQ-4X, GQ-3X & GQ-2X: MCUmall Electronics Inc.

The package includes 



True-USB Willem Programmer with High Quality 40pin ZIF (MCUmall GQ-4X4)


USB Cable (for both power supply and data communication)


  • One True-USB Willem Programmer with High-Quality 40pin ZIF (MCUmall GQ-4X4)
  • One USB Cable (for both power supply and data communication)
  • Latest online GQUSBprog software & PDF manual 

The latest GQUSBprog software also can be downloaded from here

Supported Device List

For all compatible adapters, please click here

Video on Program AT28c256 on GQ-4x4 Universal EPROM programmer

Tags: GQ, GQ-3X, GQ-4X, GQ-5X, True, USB, Willem, USB, Universal, Programmer, EPROM, Programmer, , EEPROM, programmer, FLASH, programmer, NAND, FLASH, programmer, SPI, programmer, PIC, programmer, Chip, burner, Device, programmer, AVR, programmer, EPROM, eraser

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Tags: GQ-4X, gq-4x4, USB Universal Programmer, EPROM Programmer, Chip burner, ICSP, PSOP, eprom programmer