Jump to: navigation, search

GTA04 Overview

The GTA04 is an open hardware platform. Its design is roughly based on the BeagleBoard-xM.


GTA04 Board

This is the feature list of the GTA04A4 (if integrated into an existing Neo1973/GTA01 or Freerunner/GTA02 case):

  • 2.8 inch LCD with VGA (640x480) and touch screen (single touch with pressure detection)
  • Processor: DM3730 (OMAP3), 800/1000 MHz, ARMv7 (Cortex A8), NEON, integrated DSP (TMS320C64x)
  • OpenGL© ES 2.0 capable 2D/3D graphics accelerator
  • 512 MB RAM
  • 512 MB/1 GB NAND Flash
  • microSDHC (up to 32 GB)
  • Quad-Band GSM, EDGE, UMTS HSDPA 14.4 MBit/s, HSUPA 5.76 MBit/s (Specs)
  • GPS 20 channel, int/ext. Antenna
  • FM receiver and transmitter, both with RDS
  • 802.11b/g, Bluetooth 2.0
  • USB 2.0: full OTG (Client, Charger, Host)
  • Camera 1.3 Mpx (optional accessory)
  • Sensors: 3-axis Accelerometer, 3-axis Compass, 3-axis Gyroscope, Barometer/Thermometer Ambient Light
  • Audio / Video: Ear, Microphone, (Stereo) Handsfree, 2.5mm 4pin AV Jack (Composite-Video- Out, Audio in/out, Remote Control)
  • stereo speaker support (only for Neo1973/GTA01 case)
  • Battery: replaceable 3.7 V LiIon, 1200 mAh
  • Others: 2 Buttons, 4 LEDs
  • internal RS232 (full level, RX/TX/RTS/CTS/RI) - for debugging, unbricking and optional console
  • Torch/Flash controller
  • RFID tag chip with 64 kBit EEPROM
  • IrDA (FIR) transmitter and receiver
  • fits into existing Openmoko Neo1973 or Freerunner case (reversible)
  • documentation (see Manual incl. schematics) of all GPIO and signal connections to support driver development and extensions
  • 2x 60 pin expansion connector (optional)


Openmoko Beagle Hybrid

GTA04A1/Openmoko Beagle Hybrid (2010)

A BeagleBoard-xM connected to a display-board, which fitted the case.

GTA04A2 (2010)

The first revision which integrated everything (SoC, Modem, Sensors, Peripherals, ...) on a single PCB.

GTA04A3 (2011)

  • GTM501 replaced by GTM601W
  • BMA180 accelerometer added
  • RFID-EEPROM added
  • expansion connector added

This revision was sent out to early adopters and software developers, to explore the new open hardware platform.


GTA04A4 (2012)

  • second LIS302 accelerometer removed
  • Sensors are no longer optional but always installed
  • Si4721 no longer optional but always installed


  • BMP085 replaced by BMP180
  • BMA180 replaced
  • HMC5883 replaced
  • ITG3200 replaced by BMG160
  • GPS is always W2SG0084 (Sirf IV) and delivers pulse-per-second
  • 6 wire I2C expansion connector for external keyboard option or other purposes
  • prepared for Case Kit connectivity of earpiece and vibramotor
  • headset plugin detection improved
  • production related changes (i.e. components substituted because of EOL; no visible change in features)

This revision is currently (2014) awaiting a large enough pre-order/production batch size, to be produced: