Datasheet

This is a FT2232H based JTAG programmer shield that is compatible with
OpenOCD and Broadcom's WICED IDE. The FT2232 chip is setup to provide
an USB-JTAG and USB-UART interface simultaneously. The FT2232 can be
also reconfigured by the user by reprogramming the on-board configuration
EEPROM. The unused pins are clearly marked and broken out into easy to
access header holes.
The USB-UART interface is connected to the TX and RX of a Particle device
and communicates via Serial1
Programmer Shield - Specifications
 Operating supply: USB
 Current consumption:
 Dimensions: 84mm x 39mm x 12mm / 3.3" x 1.5" x 0.5"
 Weight: 18 g
 Compatibility: OpenOCD and WICED IDE