STB1_1x1, Synplicity's High-performance ASIC Prototyping System is a board for testing purposes, used in combination with the self tests for motherboards in the HAPS-30 and HAPS-20 families. With STB1_1x1 it's possible to detect open circuits in any HapsTrak connector. The board also has four LEDs to indicate the I/O voltage, 1.5V, 1.8V, 2.5V or 3.3V.

STB1_1x1 is included in the delivery of the motherboard.

A similar board is available for HAPS-10 and FPGA_2x3.