GEM1 Adapter

Copyright (c) 2020 Antmicro

This repository contains PCB design files for an adapter board accommodating the GEM1 chip created jointly by zGlue and Antmicro. The GEM1 design utilizes the zGlue ZiP chiplet technology and has been prepared using zGlue's ChipBuilder tool. The design has been produced as a single integrated circuit in the LGA-96 package.

The GEM1 chip contains the following components located on a dynamically reconfigurable interposer:

• 2x Lattice ICE40UP5K-UWG30ITR FPGAs used for processing and system control
• 32Mbit SPI FLASH memory
• 10-channel DPDT MIPI switch allowing to connect a 2-lane MIPI CSI-2 interface either to the processing FPGA or to external output (pass-through mode)
• 12MHz system clock generator
• Internal LDOs and power management unit providing 1V2, 1V8, 2V5, 3V3 voltages

Power is supplied to the chip from a single VUSB voltage of 5 VDC. The actual configuration of the system running inside the GEM1 zip depends on the configuration routing file that is uploaded to the Smart fabric interposer. Also, pin functions of the LGA package may vary depending on the uploaded routing file. The board break-routes signals for the MIPI CSI-2 interfaces (Input and Output), along with the internal flash and FPGA configuration interfaces, control signals and power supplies.