| commit | ea90b583b5d5bb4267f2205700b8c440b0773284 | [log] [tgz] |
|---|---|---|
| author | Bryce-Readyhough <brycereadyhough@gmail.com> | Wed Dec 09 09:43:32 2020 -0800 |
| committer | Bryce-Readyhough <brycereadyhough@gmail.com> | Wed Dec 09 09:43:32 2020 -0800 |
| tree | 22d81fa82bb922cb9f9b90521c0ead7686c1d2ff | |
| parent | 1fcfaa3add39835605ed892edb923bc229b78128 [diff] |
Added the DAC to the user_project wrapper and wired it to pads
This is the Google/EFabless/Skywater Caravel submission of an Analog Spiking Neuron Circuit. The submission also includes a SONOS transistor array.
The circuit in the original paper is in 130nm technology and has a vdd of 300mV. Skywater pdk is hybrid 180nm/130nm node where the minimum transistor length is 150nm. As a result vdd needs to be higher in order to get the circuit to work properly. In simulation 700mV seems to work well.
| node | pad | node | pad |
|---|---|---|---|
| i_bias | mprj_io[13] | v_buff | mprj_io[22] |
| vad | mprj_io[14] | u_buff | mprj_io[23] |
| vr | mprj_io[15] | a_buff | mprj_io[24] |
| vk | mprj_io[16] | axon_buff | mprj_io[25] |
| vth | mprj_io[17] | sel | mprj_io[26] |
| vw | mprj_io[18] | v_syn | mprj_io[27] |
| vau | mprj_io[19] | u_syn | mprj_io[28] |
| vsyn0 | mprj_io[20] | a_syn | mprj_io[29] |
| vsyn1 | mprj_io[21] | axon_syn | mprj_io[30] |
| i_in | mprj_io[31] |
Spiking pattern at v_buff for i_in = 10pA DC
A 2x2 array of nfet sonos cells with transistor sizing 420nmx150nm.
| node | pad |
|---|---|
| WL0 | mprj_io[7] |
| WL1 | mprj_io[8] |
| BL0 | mprj_io[9] |
| SL0 | mprj_io[10] |
| BL1 | mprj_io[11] |
| SL1 | mprj_io[12] |
To setup and install the repo for development:
export PDK_ROOT=(where pdks will be installed) cd $PDK_ROOT git clone https://github.com/efabless/openlane.git -b mpw-one-a cd openlane export OPENLANE_ROOT=$(pwd) make
2. Clone and uncompress the repo
git clone https://github.com/Bryce-Readyhough/caravel_UNCC_MPW_1.git make uncompress -j$nproc