Generic Technology Cells (API to Cell Library)

Maintainer: Nils Wistoff nwistoff@iis.ee.ethz.ch

This repository contains technology related cells like SRAMs, clock-gating cells, power management cells. The description here are:

• Behavioral: Meant for RTL simulation only.
• FPGA: Meant for FPGA implementation. Currently we only support Xilinx FPGAs. But we are happy to accept patches for Altera or other devices.

It is the purpose of your technology specific file to include the cells with correct drive strength. We do not make the assumption in the front-end anymore.

As this layer needs to be re-implemented for every new technology keep it thin!

Cell Contents

If you want to get started in your own technology (either an unsupported FPGA or an ASIC technology) please provide implementations for the cells in this repository.

Clock Cells

Clock cells usually are care-fully designed cells which do not exhibit any glitches. Therefore they need to be manually instantiated in ASIC designs. All clock cells can be found in tc_clk.sv.

Name	Description	Status	Xilinx
tc_clk_and2	Clock and gate	active	✅
tc_clk_buffer	Clock buffer	active	✅
tc_clk_gating	Integrated clock gating cell	active	✅
tc_clk_inverter	Clock inverter	active	✅
tc_clk_mux2	Clock Mux with two inputs	active	✅
tc_clk_xor2	Clock Xor	active	✅
tc_clk_or2	Clock Or	active	✅
tc_clk_delay	Programmable clock-delay	active

Memory

Name	Description	Status	Xilinx
tc_sram	Configurable SRAM	active	✅

Power Cells

Power cells are mostly used for advanced power gating features and not used in any of our open-source IPs. However, feel-free to re-use them. All clock cells can be found in tc_pwr.sv.

Name	Description	Status
tc_pwr_level_shifter_in	Level Shifter	active
tc_pwr_level_shifter_in_clamp_lo	Level Shifter w/ clamp to 1'b0	active
tc_pwr_level_shifter_in_clamp_hi	Level Shifter w/ clamp to 1'b1	active
tc_pwr_level_shifter_out	Level Shifter	active
tc_pwr_level_shifter_out_clamp_lo	Level Shifter w/ clamp to 1'b0	active
tc_pwr_level_shifter_out_clamp_hi	Level Shifter w/ clamp to 1'b1	active
tc_pwr_power_gating	Power Gate with ctrl and status pins	active
tc_pwr_isolation_lo	Isolation Cell w/ isolate to 1'b0	active
tc_pwr_isolation_hi	Isolation Cell w/ isolate to 1'b1	active