4D Systems' Armadillo-43(T) is a complete Linux-based computer display module with built-in 24-bit color 480 x 272 resolution TFT LCD display featuring a resistive touch display (Armadillo-43T) or non-touch display (Armadillo-43) on special request. At the heart of the Armadillo-43(T) is a Broadcom BCM2835 system-on-chip (SoC), which combines an ARM1176JZF-S CPU processor with a VideoCore IV GPU in a single package. The Armadillo-43 features 512 MB of RAM, which is shared between the CPU and the GPU.

The Armadillo-43(T) requires a microSD card loaded with an appropriate image in order to start-up, as it features no onboard Flash memory itself, and uses the microSD card for booting and persistent storage. By default, the Armadillo-43(T) has been developed to utilize the Armadillian operating system, which is based on Raspbian/Debian and optimized for the BCM2835 SoC. Armadillian has been built by 4D Systems from source to optimize the features of the Armadillo-43T, yet created to remain compatible with the Raspbian OS.

Raspbian is the operating system primarily used by the Raspberry Pi™ which has a large following and development community. The Armadillo, which uses the same SoC, can utilize a majority of applications written for the Raspberry Pi.

The Armadillo-43(T) features 13 GPIOs, of which two can be used for a single I²C channel, five can be used for a single SPI channel (with two chip selects), and two can be used for a single serial UART. There are also two PWM channels available for the user, one of which is shared with the mono audio output via the onboard amplifier and mini speaker. Each of the GPIOs feature clamping diodes which protect the GPIOs from accidental over-voltage, typically if connected to 5 V devices. The Armadillo-43(T) features a single onboard USB A jack for connecting to devices such as keyboards, USB storage, USB hubs, Wi-Fi, Bluetooth, and Ethernet.