Commit Graph

10 Commits

Author SHA1 Message Date
Tim Edwards e2ee74c591 Changed "simple_por" in both caravel and caravan to be an abstract
view pointing to the contents of ../gds/ so that when the assembled
chip's GDS is generated with "cif *hier write disable", the POR
will continue to have the GDS with the proper hierarchical processing.
2021-11-27 11:51:30 -05:00
Tim Edwards cd68a2aeff Made several corrections to errors found in the netlists: (1)
Fixed rstb_h, which was being input to low-voltage blocks.  (2)
Fixed flash_csb_ieb_core and flash_clk_ieb_core, which were not
output from housekeeping as they should be;  the solution was
to tie the INP_DIS lines low at the pad by connecting them to
the TIE_LO_ESD line.  This should probably be addressed in
housekeeping but would change the current pinout.
2021-11-22 15:21:06 -05:00
Tim Edwards 515b5a54f2 Updates for LVS. Only LVS issue remaining for caravel is how to get the
ground domains to extract independently.
2021-11-22 12:00:55 -05:00
Tim Edwards 6eb8bb54de Several more LVS corrections, including fixing a label in chip_io that
got removed from its net by a chang in the LEF view of an I/O pad, and
a lack of declaration of an array to attach to pwr_ctrl_out in the
verilog, which is valid verilog but netgen can't know the bus size
without the no-connect net being declared.  The remaining issue has to
do with separation of ground domains in the mgmt_protect block.
2021-11-21 22:58:39 -05:00
Tim Edwards 559675d392 Corrected chip_io and chip_io_alt layouts to restore the accidentally
deleted "resetb_core_h" port label.  Corrected the chip_io and chip_io_alt
verilog RTL files to replace the user area power supply clamp cells with
the new clamped3 cell from open_pdks.
2021-11-15 17:13:43 -05:00
Tim Edwards f28950695d Made adjustments to the padframe routing to move all routes closer
to the padframe and free up more space for routing in the chip
interior.
2021-11-15 11:52:08 -05:00
Tim Edwards 67e48e53c5 Corrected minor DRC errors around the padframe cell and in the new
caravan logo layout.  Current design is DRC clean with the new
open_pdks maglef views of the I/O cells.
2021-11-12 16:12:12 -05:00
Tim Edwards 27fdba364b Added user 1.8V power supply rails to the chip_io and chip_io_alt
layouts.  Because the 1.8V domains are no longer within the pad
ring buses, they need to be connected together in the cell.  These
internal lines were previously in the power routing cells.
2021-11-10 17:13:43 -05:00
Tim Edwards ba932643e6 Changed the chip_io and chip_io_alt layouts to implement the
continuous ring of vccd and vssd.  The clamp connections for the
vccd1/vssd1 and vccd2/vssd2 pads still need to be done, although
the pads themselves have been changed to the base cell, matching
the new verilog RTL.
2021-11-03 15:57:46 -04:00
Tim Edwards a7148378a0 Added as many of the magic database layout files as are expected to remain
unchanged between the caravel and caravel_openframe repositories.
2021-10-26 10:27:03 -04:00