Pins are blocked for P&R in generated LEF file

[Fatsie]

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.

[mguthaus]

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 The public repo is a bit outdated so some of these may have been fixed already.

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--- 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. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#45?email_source=notifications&email_token=AC67SL2QN62MUGHEG552E63PWZUOPA5CNFSM4HO5DMVKYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4GVNJZDQ>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AC67SL55QVVU7AWCSPHMIKLPWZUOPANCNFSM4HO5DMVA> .

[Fatsie]

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"

[mguthaus]

Sorry for the delay. We are aware and see this problem. There are two fixes that will be available soon to resolve this:

1. The pins will be brought to M3 on the perimeter.
2. 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.

[mguthaus]

This is fixed in an upcoming release. Instead of blocking all metal1 and metal2 in the leaf cells, we provide detailed blockages instead.