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Release the SKY130 SRAM build space + OpenRAM support. #221

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Release the SKY130 SRAM build space + OpenRAM support. #221

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Commits on Nov 8, 2020

  1. docs: Change abbreviation for buildspace. 

    The `sp` abbreviation was too close to single port in the sram build
space and causing confusion.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
    @mithro
    mithro committed Nov 8, 2020
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  2. docs: Adding prebuilt IP blocks to the library types.

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    mithro committed Nov 8, 2020
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  3. sky130_fd_bd_sram: Adding the SKY130 SRAM build space + OpenRAM macros. 

    This pull request adds the sky130_fd_bd_sram library which contains the
SKY130 SRAM build space which includes;
 * Optimized single port SRAM cells including pre-calculated OPC.
 * Optimized dual port SRAM cells including pre-calculated OPC.
 * OpenRAM tech files enabling the compilation of SRAM macros using the
   [OpenRAM memory compiler](https://github.com/VLSIDA/OpenRAM).

The pull request also adds sky130_openram_ip_sram which contains
prebuilt macros for commonly needed SRAM blocks.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
    @mithro
    mithro committed Nov 8, 2020
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