From d8c98c9904b9a6c51bf91332ffe926c33a7a4409 Mon Sep 17 00:00:00 2001 From: Istvan Csomortani Date: Wed, 19 Aug 2020 14:36:43 +0100 Subject: [PATCH] cn0540/coraz7s: Relax timing in SPI Engine --- projects/cn0540/coraz7s/system_constr.xdc | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/projects/cn0540/coraz7s/system_constr.xdc b/projects/cn0540/coraz7s/system_constr.xdc index 2876f55bc..20a72d092 100755 --- a/projects/cn0540/coraz7s/system_constr.xdc +++ b/projects/cn0540/coraz7s/system_constr.xdc @@ -23,3 +23,7 @@ set_property -dict {PACKAGE_PIN T14 IOSTANDARD LVCMOS33} set_property -dict {PACKAGE_PIN P16 IOSTANDARD LVCMOS33} [get_ports cn0540_scl] ; ## CK_SCL set_property -dict {PACKAGE_PIN P15 IOSTANDARD LVCMOS33} [get_ports cn0540_sda] ; ## CK_SDA + +# relax the timing between the SDO FIFO and shift-register +set_multicycle_path 2 -setup -from [get_pins -hierarchical -filter {NAME=~*/i_sdo_fifo/i_mem/m_ram_reg/CLKARDCLK}] -to [get_pins -hierarchical -filter {NAME=~*/data_sdo_shift_reg[*]/D}] +set_multicycle_path 1 -hold -from [get_pins -hierarchical -filter {NAME=~*/i_sdo_fifo/i_mem/m_ram_reg/CLKARDCLK}] -to [get_pins -hierarchical -filter {NAME=~*/data_sdo_shift_reg[*]/D}]