Comments (4)
mguthaus
commented on August 23, 2024
Please provide which git version you are using and a configuration file.
The public repo is a bit outdated so some of these may have been fixed
already.
…---
Matthew Guthaus
Professor, Computer Science and Engineering
University of California Santa Cruz
https://www.soe.ucsc.edu/people/mrg
On Thu, May 23, 2019, 03:09 Staf Verhaegen ***@***.***> wrote:
I generated a 1024x8 SRAM block with the scn4m_subm technology. When
looking at the LEF files the (input) pins don't seem to be accessible for
P&R.
The flip-flops have an OBS on metal1 and metal2 and on metal3 and metal4
the GND/VDD grid is generated.
My design was just test chip with an OpenRAM block, I circumvented the
problem by manual connecting the pins out of the block.
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Fatsie
commented on August 23, 2024
I am using head: 76e2ab8
config:
word_size = 8
num_words = 1024
tech_name = "scn4m_subm"
process_corners = ["TT"]
supply_voltages = [ 3.3 ]
temperatures = [ 25 ]
output_path = output_name = "SRAM{}x{}".format(num_words, word_size)
route_supplies = True
drc_name = "magic"
lvs_name = "netgen"
pex_name = "magic"from openram.
mguthaus
commented on August 23, 2024
Sorry for the delay. We are aware and see this problem. There are two fixes that will be available soon to resolve this:
- The pins will be brought to M3 on the perimeter.
- There is a mistake in generating blockages of the leaf cells (6T, sense amp, DFF). It simply blocks all metal1 and metal2, instead of the detailed blockages in the leaf GDS.
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mguthaus
commented on August 23, 2024
This is fixed in an upcoming release. Instead of blocking all metal1 and metal2 in the leaf cells, we provide detailed blockages instead.
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Related Issues (20)
- Error in SRAM creation with banks HOT 6
- Support for PROBE PDK HOT 4
- ROM dump + replace contents
- ROM >= 8k fails to build HOT 3
- multiports bitcell HOT 1
- Stimuli Generation - sram_func.py or gen_stimuli.py
- Importing a custom GDS file. HOT 7
- Routing error due to high (vertical) density? HOT 1
- No liberty file is created for ROMs HOT 2
- Import custom file HOT 3
- Question: What is the correct allignment in SKY130? Intermediate Pins are not connected to the grid. Likely user mistake. HOT 10
- Errors hidden on default loglevel, but visible on verbose loglevels.
- Support for ASAP7 PDK HOT 1
- Power estimation seems too high HOT 14
- Possible minor error on the documentation related with the ROM usage
- Not generate certain module HOT 1
- Runtime HOT 8
- Adding and Removing Modules and Customizing Module Ports HOT 3
- Error in using sram macro(tiny) in openlane2 HOT 3
- Generating SRAM gets stuck in extraction process of magic HOT 3
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