From b90567620983a08bfb4c49a52cbb7cfeccdbb9aa Mon Sep 17 00:00:00 2001
From: agorararmard <aagouhar@efabless.com>
Date: Thu, 8 Oct 2020 12:58:21 +0000
Subject: [PATCH] CLOCK_PERIOD update

- Updating the clock period of all designs in hd to reduce the spef_wns by adjusting the CLOCK_PERIOD to the value of the suggested_clock_period of a previous regression run.

- Some designs were left with clock periods that produce a negative spef_wns to be used as a test of the functionality of the timing closure tools (OpenSTA, OpenPhySyn, and SPEF_EXTRACTOR)
---
 designs/APU/sky130A_sky130_fd_sc_hd_config.tcl                | 3 +++
 designs/BM64/sky130A_sky130_fd_sc_hd_config.tcl               | 3 +++
 designs/PPU/sky130A_sky130_fd_sc_hd_config.tcl                | 3 +++
 designs/aes/sky130A_sky130_fd_sc_hd_config.tcl                | 3 +++
 designs/aes128/sky130A_sky130_fd_sc_hd_config.tcl             | 3 +++
 designs/aes192/sky130A_sky130_fd_sc_hd_config.tcl             | 3 +++
 designs/aes256/sky130A_sky130_fd_sc_hd_config.tcl             | 3 +++
 designs/aes_cipher/sky130A_sky130_fd_sc_hd_config.tcl         | 3 +++
 designs/aes_core/sky130A_sky130_fd_sc_hd_config.tcl           | 3 +++
 designs/blabla/sky130A_sky130_fd_sc_hd_config.tcl             | 4 +++-
 designs/chacha/sky130A_sky130_fd_sc_hd_config.tcl             | 3 +++
 designs/cic_decimator/sky130A_sky130_fd_sc_hd_config.tcl      | 3 +++
 designs/des/sky130A_sky130_fd_sc_hd_config.tcl                | 3 +++
 designs/des3/sky130A_sky130_fd_sc_hd_config.tcl               | 3 +++
 .../sky130A_sky130_fd_sc_hd_config.tcl                        | 3 +++
 designs/genericfir/sky130A_sky130_fd_sc_hd_config.tcl         | 3 +++
 designs/jpeg_encoder/sky130A_sky130_fd_sc_hd_config.tcl       | 3 +++
 .../ldpc_decoder_802_3an/sky130A_sky130_fd_sc_hd_config.tcl   | 3 +++
 designs/ldpcenc/sky130A_sky130_fd_sc_hd_config.tcl            | 3 +++
 designs/md5/sky130A_sky130_fd_sc_hd_config.tcl                | 3 +++
 designs/ocs_blitter/sky130A_sky130_fd_sc_hd_config.tcl        | 3 +++
 designs/picorv32a/sky130A_sky130_fd_sc_hd_config.tcl          | 3 +++
 designs/point_add/sky130A_sky130_fd_sc_hd_config.tcl          | 3 +++
 designs/point_scalar_mult/sky130A_sky130_fd_sc_hd_config.tcl  | 3 +++
 designs/salsa20/sky130A_sky130_fd_sc_hd_config.tcl            | 3 +++
 designs/sha3/sky130A_sky130_fd_sc_hd_config.tcl               | 3 +++
 designs/sha512/sky130A_sky130_fd_sc_hd_config.tcl             | 3 +++
 designs/spm/sky130A_sky130_fd_sc_hd_config.tcl                | 3 +++
 designs/usb/sky130A_sky130_fd_sc_hd_config.tcl                | 3 +++
 designs/usb_cdc_core/sky130A_sky130_fd_sc_hd_config.tcl       | 3 +++
 designs/usbf_device/sky130A_sky130_fd_sc_hd_config.tcl        | 3 +++
 designs/wbqspiflash/sky130A_sky130_fd_sc_hd_config.tcl        | 3 +++
 designs/xtea/sky130A_sky130_fd_sc_hd_config.tcl               | 3 +++
 designs/y_dct/sky130A_sky130_fd_sc_hd_config.tcl              | 3 +++
 designs/y_huff/sky130A_sky130_fd_sc_hd_config.tcl             | 3 +++
 designs/zipdiv/sky130A_sky130_fd_sc_hd_config.tcl             | 3 +++
 36 files changed, 108 insertions(+), 1 deletion(-)

diff --git a/designs/APU/sky130A_sky130_fd_sc_hd_config.tcl b/designs/APU/sky130A_sky130_fd_sc_hd_config.tcl
index 681984f15..516e5fad5 100644
--- a/designs/APU/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/APU/sky130A_sky130_fd_sc_hd_config.tcl
@@ -18,3 +18,6 @@ set ::env(FP_CORE_UTIL) 40
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "17.0"
diff --git a/designs/BM64/sky130A_sky130_fd_sc_hd_config.tcl b/designs/BM64/sky130A_sky130_fd_sc_hd_config.tcl
index bb14eb7fb..2fae95c50 100644
--- a/designs/BM64/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/BM64/sky130A_sky130_fd_sc_hd_config.tcl
@@ -12,3 +12,6 @@ set ::env(FP_CORE_UTIL) 40
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "20.0"
diff --git a/designs/PPU/sky130A_sky130_fd_sc_hd_config.tcl b/designs/PPU/sky130A_sky130_fd_sc_hd_config.tcl
index c00a31ea7..3125912c7 100644
--- a/designs/PPU/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/PPU/sky130A_sky130_fd_sc_hd_config.tcl
@@ -27,3 +27,6 @@ set ::env(SYNTH_MAX_FANOUT) 8
 
 
 set ::env(PL_TARGET_DENSITY) 0.2
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "18.0"
diff --git a/designs/aes/sky130A_sky130_fd_sc_hd_config.tcl b/designs/aes/sky130A_sky130_fd_sc_hd_config.tcl
index 4becef143..d48ac5d96 100644
--- a/designs/aes/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/aes/sky130A_sky130_fd_sc_hd_config.tcl
@@ -54,3 +54,6 @@ set ::env(SYNTH_MAX_FANOUT) 8
 
 
 set ::env(PL_TARGET_DENSITY) 0.2 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "25.9"
diff --git a/designs/aes128/sky130A_sky130_fd_sc_hd_config.tcl b/designs/aes128/sky130A_sky130_fd_sc_hd_config.tcl
index 6a301c3c3..78b68603e 100644
--- a/designs/aes128/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/aes128/sky130A_sky130_fd_sc_hd_config.tcl
@@ -41,3 +41,6 @@ set ::env(FP_CORE_UTIL) 30
 set ::env(GLB_RT_ADJUSTMENT) 0.1
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "11.43"
diff --git a/designs/aes192/sky130A_sky130_fd_sc_hd_config.tcl b/designs/aes192/sky130A_sky130_fd_sc_hd_config.tcl
index b198c110c..a7bbc9eac 100644
--- a/designs/aes192/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/aes192/sky130A_sky130_fd_sc_hd_config.tcl
@@ -48,3 +48,6 @@ set ::env(SYNTH_MAX_FANOUT) 9
 
 
 set ::env(PL_TARGET_DENSITY) 0.2 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "12.37"
diff --git a/designs/aes256/sky130A_sky130_fd_sc_hd_config.tcl b/designs/aes256/sky130A_sky130_fd_sc_hd_config.tcl
index f04673e34..01da73032 100644
--- a/designs/aes256/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/aes256/sky130A_sky130_fd_sc_hd_config.tcl
@@ -36,3 +36,6 @@ set ::env(GLB_RT_ADJUSTMENT) 0.05
 
 # Extra
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "15.0"
diff --git a/designs/aes_cipher/sky130A_sky130_fd_sc_hd_config.tcl b/designs/aes_cipher/sky130A_sky130_fd_sc_hd_config.tcl
index 8ad6f2813..400303830 100644
--- a/designs/aes_cipher/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/aes_cipher/sky130A_sky130_fd_sc_hd_config.tcl
@@ -7,3 +7,6 @@ set ::env(FP_CORE_UTIL) 30
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.09"
diff --git a/designs/aes_core/sky130A_sky130_fd_sc_hd_config.tcl b/designs/aes_core/sky130A_sky130_fd_sc_hd_config.tcl
index 8b0408f8c..02a2cd944 100644
--- a/designs/aes_core/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/aes_core/sky130A_sky130_fd_sc_hd_config.tcl
@@ -41,3 +41,6 @@ set ::env(FP_CORE_UTIL) 30
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "21.28"
diff --git a/designs/blabla/sky130A_sky130_fd_sc_hd_config.tcl b/designs/blabla/sky130A_sky130_fd_sc_hd_config.tcl
index e371b29a8..c4343a0be 100644
--- a/designs/blabla/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/blabla/sky130A_sky130_fd_sc_hd_config.tcl
@@ -1,4 +1,6 @@
 set ::env(GLB_RT_ADJUSTMENT) 0.1
 set ::env(SYNTH_STRATEGY) 3
 set ::env(FP_CORE_UTIL) 20
-set ::env(PL_TARGET_DENSITY) 0.15
\ No newline at end of file
+set ::env(PL_TARGET_DENSITY) 0.15
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "65.0"
diff --git a/designs/chacha/sky130A_sky130_fd_sc_hd_config.tcl b/designs/chacha/sky130A_sky130_fd_sc_hd_config.tcl
index bc68b5ef9..bc2126826 100644
--- a/designs/chacha/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/chacha/sky130A_sky130_fd_sc_hd_config.tcl
@@ -23,3 +23,6 @@ set ::env(FP_CORE_UTIL) 30
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "26.01"
diff --git a/designs/cic_decimator/sky130A_sky130_fd_sc_hd_config.tcl b/designs/cic_decimator/sky130A_sky130_fd_sc_hd_config.tcl
index cf0421426..199e9408f 100644
--- a/designs/cic_decimator/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/cic_decimator/sky130A_sky130_fd_sc_hd_config.tcl
@@ -20,3 +20,6 @@ set ::env(FP_CORE_UTIL) 65
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.0"
diff --git a/designs/des/sky130A_sky130_fd_sc_hd_config.tcl b/designs/des/sky130A_sky130_fd_sc_hd_config.tcl
index 3428501ef..b79d247bb 100644
--- a/designs/des/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/des/sky130A_sky130_fd_sc_hd_config.tcl
@@ -13,3 +13,6 @@ set ::env(SYNTH_MAX_FANOUT) 6
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "11.0"
diff --git a/designs/des3/sky130A_sky130_fd_sc_hd_config.tcl b/designs/des3/sky130A_sky130_fd_sc_hd_config.tcl
index 27689aa84..af13bc23b 100644
--- a/designs/des3/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/des3/sky130A_sky130_fd_sc_hd_config.tcl
@@ -28,3 +28,6 @@ set ::env(SYNTH_MAX_FANOUT) 7
 
 
 set ::env(PL_TARGET_DENSITY) 0.2 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "7.59"
diff --git a/designs/digital_pll_sky130_fd_sc_hd/sky130A_sky130_fd_sc_hd_config.tcl b/designs/digital_pll_sky130_fd_sc_hd/sky130A_sky130_fd_sc_hd_config.tcl
index 649ec8645..bccc4821a 100644
--- a/designs/digital_pll_sky130_fd_sc_hd/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/digital_pll_sky130_fd_sc_hd/sky130A_sky130_fd_sc_hd_config.tcl
@@ -10,3 +10,6 @@ set ::env(FP_CORE_UTIL) 65
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "15.8"
diff --git a/designs/genericfir/sky130A_sky130_fd_sc_hd_config.tcl b/designs/genericfir/sky130A_sky130_fd_sc_hd_config.tcl
index f290bcaa2..412c64cae 100644
--- a/designs/genericfir/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/genericfir/sky130A_sky130_fd_sc_hd_config.tcl
@@ -31,3 +31,6 @@ set ::env(SYNTH_MAX_FANOUT) 7
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.0"
diff --git a/designs/jpeg_encoder/sky130A_sky130_fd_sc_hd_config.tcl b/designs/jpeg_encoder/sky130A_sky130_fd_sc_hd_config.tcl
index 028c90ff7..0561d930f 100644
--- a/designs/jpeg_encoder/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/jpeg_encoder/sky130A_sky130_fd_sc_hd_config.tcl
@@ -9,3 +9,6 @@ set ::env(CLOCK_PERIOD) "15.000"
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "15.78"
diff --git a/designs/ldpc_decoder_802_3an/sky130A_sky130_fd_sc_hd_config.tcl b/designs/ldpc_decoder_802_3an/sky130A_sky130_fd_sc_hd_config.tcl
index a62cc2fa0..3ba56023b 100644
--- a/designs/ldpc_decoder_802_3an/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/ldpc_decoder_802_3an/sky130A_sky130_fd_sc_hd_config.tcl
@@ -1,2 +1,5 @@
 set ::env(FP_CORE_UTIL) 15
 set ::env(PL_TARGET_DENSITY) 0.15
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "15.0"
diff --git a/designs/ldpcenc/sky130A_sky130_fd_sc_hd_config.tcl b/designs/ldpcenc/sky130A_sky130_fd_sc_hd_config.tcl
index 85529dfd3..98abc0375 100644
--- a/designs/ldpcenc/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/ldpcenc/sky130A_sky130_fd_sc_hd_config.tcl
@@ -26,3 +26,6 @@ set ::env(FP_CORE_UTIL) 25
 
 
 set ::env(PL_TARGET_DENSITY) 0.2
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "12.9"
diff --git a/designs/md5/sky130A_sky130_fd_sc_hd_config.tcl b/designs/md5/sky130A_sky130_fd_sc_hd_config.tcl
index 4acb697fc..423c17634 100644
--- a/designs/md5/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/md5/sky130A_sky130_fd_sc_hd_config.tcl
@@ -9,3 +9,6 @@ set ::env(FP_CORE_UTIL) 50
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "30.0"
diff --git a/designs/ocs_blitter/sky130A_sky130_fd_sc_hd_config.tcl b/designs/ocs_blitter/sky130A_sky130_fd_sc_hd_config.tcl
index f28bca40c..11998f0f2 100644
--- a/designs/ocs_blitter/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/ocs_blitter/sky130A_sky130_fd_sc_hd_config.tcl
@@ -8,3 +8,6 @@ set ::env(CLOCK_PERIOD) "10.000"
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "18.2"
diff --git a/designs/picorv32a/sky130A_sky130_fd_sc_hd_config.tcl b/designs/picorv32a/sky130A_sky130_fd_sc_hd_config.tcl
index a08cd842c..06c1ab6eb 100644
--- a/designs/picorv32a/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/picorv32a/sky130A_sky130_fd_sc_hd_config.tcl
@@ -19,3 +19,6 @@ set ::env(FP_CORE_UTIL) 40
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "24.73"
diff --git a/designs/point_add/sky130A_sky130_fd_sc_hd_config.tcl b/designs/point_add/sky130A_sky130_fd_sc_hd_config.tcl
index 020ea5572..6e6e9e76d 100644
--- a/designs/point_add/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/point_add/sky130A_sky130_fd_sc_hd_config.tcl
@@ -29,3 +29,6 @@ set ::env(SYNTH_MAX_FANOUT) 5
 
 # Extra
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.0"
diff --git a/designs/point_scalar_mult/sky130A_sky130_fd_sc_hd_config.tcl b/designs/point_scalar_mult/sky130A_sky130_fd_sc_hd_config.tcl
index 7b4151034..2acd2fac3 100644
--- a/designs/point_scalar_mult/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/point_scalar_mult/sky130A_sky130_fd_sc_hd_config.tcl
@@ -38,3 +38,6 @@ set ::env(FP_CORE_UTIL) 20
 
 
 set ::env(PL_TARGET_DENSITY) 0.2
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.0"
diff --git a/designs/salsa20/sky130A_sky130_fd_sc_hd_config.tcl b/designs/salsa20/sky130A_sky130_fd_sc_hd_config.tcl
index ce94a287a..e539cd438 100644
--- a/designs/salsa20/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/salsa20/sky130A_sky130_fd_sc_hd_config.tcl
@@ -11,3 +11,6 @@ set ::env(FP_CORE_UTIL) 45
 set ::env(SYNTH_MAX_FANOUT) 6
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "24.73"
diff --git a/designs/sha3/sky130A_sky130_fd_sc_hd_config.tcl b/designs/sha3/sky130A_sky130_fd_sc_hd_config.tcl
index 63f8120b0..836728efb 100644
--- a/designs/sha3/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/sha3/sky130A_sky130_fd_sc_hd_config.tcl
@@ -27,3 +27,6 @@ set ::env(FP_CORE_UTIL) 40
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "12.71"
diff --git a/designs/sha512/sky130A_sky130_fd_sc_hd_config.tcl b/designs/sha512/sky130A_sky130_fd_sc_hd_config.tcl
index 2553446f1..df043b130 100644
--- a/designs/sha512/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/sha512/sky130A_sky130_fd_sc_hd_config.tcl
@@ -20,3 +20,6 @@ set ::env(GLB_RT_ADJUSTMENT) 0.1
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ]
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "34.27"
diff --git a/designs/spm/sky130A_sky130_fd_sc_hd_config.tcl b/designs/spm/sky130A_sky130_fd_sc_hd_config.tcl
index 34d147210..07e178fc1 100644
--- a/designs/spm/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/spm/sky130A_sky130_fd_sc_hd_config.tcl
@@ -13,3 +13,6 @@ set ::env(FP_CORE_UTIL) 65
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.0"
diff --git a/designs/usb/sky130A_sky130_fd_sc_hd_config.tcl b/designs/usb/sky130A_sky130_fd_sc_hd_config.tcl
index acb357b54..26b3fd50f 100644
--- a/designs/usb/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/usb/sky130A_sky130_fd_sc_hd_config.tcl
@@ -18,3 +18,6 @@ set ::env(FP_CORE_UTIL) 65
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.0"
diff --git a/designs/usb_cdc_core/sky130A_sky130_fd_sc_hd_config.tcl b/designs/usb_cdc_core/sky130A_sky130_fd_sc_hd_config.tcl
index e383813a7..212d7b40e 100644
--- a/designs/usb_cdc_core/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/usb_cdc_core/sky130A_sky130_fd_sc_hd_config.tcl
@@ -18,3 +18,6 @@ set ::env(FP_CORE_UTIL) 50
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "11.9"
diff --git a/designs/usbf_device/sky130A_sky130_fd_sc_hd_config.tcl b/designs/usbf_device/sky130A_sky130_fd_sc_hd_config.tcl
index 498fcb6cb..2a9b452c4 100644
--- a/designs/usbf_device/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/usbf_device/sky130A_sky130_fd_sc_hd_config.tcl
@@ -5,3 +5,6 @@ set ::env(SYNTH_MAX_FANOUT) 6
 #Routing
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "11.82"
diff --git a/designs/wbqspiflash/sky130A_sky130_fd_sc_hd_config.tcl b/designs/wbqspiflash/sky130A_sky130_fd_sc_hd_config.tcl
index 8d47dff23..bd68659d4 100644
--- a/designs/wbqspiflash/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/wbqspiflash/sky130A_sky130_fd_sc_hd_config.tcl
@@ -19,3 +19,6 @@ set ::env(FP_CORE_UTIL) 50
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "14.9"
diff --git a/designs/xtea/sky130A_sky130_fd_sc_hd_config.tcl b/designs/xtea/sky130A_sky130_fd_sc_hd_config.tcl
index 39c198a3e..901a2dbf0 100644
--- a/designs/xtea/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/xtea/sky130A_sky130_fd_sc_hd_config.tcl
@@ -37,3 +37,6 @@ set ::env(FP_CORE_UTIL) 30
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "18.49"
diff --git a/designs/y_dct/sky130A_sky130_fd_sc_hd_config.tcl b/designs/y_dct/sky130A_sky130_fd_sc_hd_config.tcl
index 800817ab5..f01203b87 100644
--- a/designs/y_dct/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/y_dct/sky130A_sky130_fd_sc_hd_config.tcl
@@ -1,2 +1,5 @@
 set ::env(FP_CORE_UTIL) 40
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "18.52"
diff --git a/designs/y_huff/sky130A_sky130_fd_sc_hd_config.tcl b/designs/y_huff/sky130A_sky130_fd_sc_hd_config.tcl
index 76733acd4..460e5b903 100644
--- a/designs/y_huff/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/y_huff/sky130A_sky130_fd_sc_hd_config.tcl
@@ -20,3 +20,6 @@ set ::env(FP_CORE_UTIL) 50
 
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "10.0"
diff --git a/designs/zipdiv/sky130A_sky130_fd_sc_hd_config.tcl b/designs/zipdiv/sky130A_sky130_fd_sc_hd_config.tcl
index 661021d3f..da42f6843 100644
--- a/designs/zipdiv/sky130A_sky130_fd_sc_hd_config.tcl
+++ b/designs/zipdiv/sky130A_sky130_fd_sc_hd_config.tcl
@@ -15,3 +15,6 @@ set ::env(FP_CORE_UTIL) 55
 # Extra
 
 set ::env(PL_TARGET_DENSITY) [ expr ($::env(FP_CORE_UTIL)-10) / 100.0 ] 
+
+# Suggested Clock Period:
+ set ::env(CLOCK_PERIOD) "12.29"