golden_config.tcl

# PLEASE DO NOT EDIT THIS FILE!
# The only thing you can change is the PL_BASIC_PLACEMENT line
# If you get stuck with this config, please open an issue or get in touch via the discord.

# User config
set script_dir [file dirname [file normalize [info script]]]

# read some user config that is written by the setup.py program.
# - the name of the module is defined
# - the list of source files
source $::env(DESIGN_DIR)/user_config.tcl

# save some time
set ::env(RUN_KLAYOUT_XOR) 0
set ::env(RUN_KLAYOUT_DRC) 0

# don't put clock buffers on the outputs
set ::env(PL_RESIZER_BUFFER_OUTPUT_PORTS) 0

# allow use of specific sky130 cells
set ::env(SYNTH_READ_BLACKBOX_LIB) 1

# put all the pins on the left
set ::env(FP_PIN_ORDER_CFG) $::env(DESIGN_DIR)/pin_order.cfg

# reduce wasted space
set ::env(TOP_MARGIN_MULT) 2
set ::env(BOTTOM_MARGIN_MULT) 2

# absolute die size
set ::env(FP_SIZING) absolute
set ::env(DIE_AREA) "0 0 150 170"
set ::env(FP_CORE_UTIL) 55

# fails for small jobs but much faster for bigger ones
set ::env(PL_BASIC_PLACEMENT) {0}
set ::env(GLB_RT_ALLOW_CONGESTION) "1"

set ::env(FP_IO_HLENGTH) 2
set ::env(FP_IO_VLENGTH) 2

# use alternative efabless decap cells to solve LI density issue
set ::env(DECAP_CELL) "\
    sky130_fd_sc_hd__decap_3 \
    sky130_fd_sc_hd__decap_4 \
    sky130_fd_sc_hd__decap_6 \
    sky130_fd_sc_hd__decap_8 \
    sky130_ef_sc_hd__decap_12"

# clock
set ::env(CLOCK_TREE_SYNTH) 1
# period is in ns, so 20000ns == 50kHz
set ::env(CLOCK_PERIOD) "20000"
set ::env(CLOCK_PORT) {io_in[0]}

# hold/slack margin
# set ::env(PL_RESIZER_HOLD_SLACK_MARGIN) 0.8 
# set ::env(GLB_RESIZER_HOLD_SLACK_MARGIN) 0.8 

# don't use power rings or met5
set ::env(DESIGN_IS_CORE) 0
set ::env(RT_MAX_LAYER) {met4}

# connect to first digital rails
set ::env(VDD_NETS) [list {vccd1}]
set ::env(GND_NETS) [list {vssd1}]