The Spikcore team has the goal to design a reconfigurable neuromorphic chip, this neuromorphic chip can be used to test codification schemes, control strategies and learn about analogic circuits and spiking neural networks
The proven MOSbius platform demonstrates the possibility to reconfigure the internal components of the chip, thus achieving different applications with the same hardware. For example: 2-stage OTA, sigma-delta converter, ring oscillator, etc. MOSbius project
the proposal presented at the SSCS 2025 on july 11th can be found here
The full proposal of the team can be found here
The proposed overview for the MOSbius chip is shown below.
The proposal contains:
- 7 Synapses
- 7 subthreshold Neuron (AH model)
- 1 LIF Neuron (ring oscillator based)
- 1 LIF Neuron (comparator and opamp based)
- 65x10 switch matrix
- D type Flip-flops with non overlaping clock
- Transmission gates
The number of proposed pins is 64:
- 3 Control pins per synapse (21 pins total)
- 1 input, 1 output per synapse (14 pins total)
- 1 input voltage per neuron (9 pins total)
- 1 input, 1 output per neuron (18 pins total)
The pinout can be reduced to 43 pins if shared between neurons voltage supply, and sharing the signals from the vexc and vinh on the synapses.
As with any team, we need a timeline and time estimates. You can find the timeline here
The /foss/designs directory inside the Docker container is mounted from the designs folder in this repository.
project-root/
├── designs/ # Main folder
│ ├── libs/ # Design libraries
│ │ ├──core_*/ # Design libraries (core functionality)
│ │ ├──tb_core_analogs/ # Testbench libraries for analog elements
│ │ │ └──tb_*/ # Testbenchs for individual analog elements
│ │ ├──tb_core_analogs_pads/ # Testbench libraries for analog elements with parasitic extraction pads
│ │ │ └──tb_*/ # Testbenchs for individual analog elements
│ │ ├──tb_core_swmatrix/ # Testbench libraries for switch matrix
│ │ │ └──tb_*/ # Testbenchs for switch matrix elements
│ │ └──gf180mcu_fd_sc.../ # Submodule to gf180 symbols
│ │ └──switch_matrix_.../ # Submodule to sw matrix Mosbius fork
│ │ └──tb_top/ # Top integration for final sims
│ ├── klayout/ # GDS files for layout
│ │ └──layout_*/ # layout for individual cells of the chip
│ └── pex/ # Parasitic Extraction for analog elements
├── proposal/ # Proposal files
├── start_chipathon_vnc.bat # Container launch script (Windows)
└── README.md # This file
First things first, clone the repo, you'll know how ;)
Inside the /foss/designs/libs directory there are two submodules gf180mcu and switch_matrix; said modules have to initiated, this can be done like this (of course in the root folder):
# 1) Initialize all submodules listed in .gitmodules
git submodule update --init
# 2) (Optional but handy) See what you have now
git submodule status