From ce91890a0eb9f628e535e4b762bdc99696372d35 Mon Sep 17 00:00:00 2001 From: tangxifan Date: Wed, 18 Nov 2020 11:58:21 -0700 Subject: [PATCH] [HDL] Now use a proper drive strength of 4 in the digital I/O cells --- HDL/common/digital_io_hd.v | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/HDL/common/digital_io_hd.v b/HDL/common/digital_io_hd.v index c626404..b1548df 100644 --- a/HDL/common/digital_io_hd.v +++ b/HDL/common/digital_io_hd.v @@ -36,14 +36,14 @@ module EMBEDDED_IO_HD ( .X(SOC_DIR) ); - // Use drive-strength 2 for a high fan-out from global routing architecture - sky130_fd_sc_hd__and2_2 IN_PROTECT_GATE (.A(SOC_DIR), + // Use drive-strength 4 for a high fan-out from global routing architecture + sky130_fd_sc_hd__and2_4 IN_PROTECT_GATE (.A(SOC_DIR), .B(SOC_IN), .X(FPGA_IN) ); - // Use drive-strength 1 for a potential high fan-out from SoC components - sky130_fd_sc_hd__and2b_1 OUT_PROTECT_GATE (.A_N(SOC_DIR), + // Use drive-strength 4 for a potential high fan-out from SoC components + sky130_fd_sc_hd__and2b_4 OUT_PROTECT_GATE (.A_N(SOC_DIR), .B(FPGA_OUT), .X(SOC_OUT) );