:mag: Diving Deep into Clock Tree Synthesis for DD...
# general
v
πŸ” Diving Deep into Clock Tree Synthesis for DDR Timing Closure! βš™οΈ πŸ‘‰Contact to join the SDC workshop - https://api.whatsapp.com/send/?phone=919817182494&text=Hi+vlsideepdive%2C+I+have+a+query&type=phone_number&app_absent=0 🧠Let us understand the intricate challenges of designing clock trees for DDR interfaces in ASIC design. Here's a peek into the technical nuances: βš™οΈ Complexity Unveiled: The unique demands of DDR, especially in non-clock-gating scenarios, you need to rethink clock-tree synthesis, employing Apollo scripts for precision. 🌳 βš™οΈ Precision in Performance: Setting aggressive targets for insertion delay and clock skew (2ns and 300ps for clk_ddr), to align clocks meticulously to meet external memory's stringent 90-phase requirement. ⏲️ βš™οΈNavigating Atypical Loads: The specialized IO cell design introduced uncommon clock loads, challenging to specify individual combinational logic cells. A test of adaptability and precision! πŸš€ βš™οΈStrategic Synthesis: The strategy should also focus on controlling transition delays to ideally be less than 5% of the clock cycle, optimizing buffer capacitance and fanout numbers to achieve skew goals. πŸ› οΈ βš™οΈ Balancing Acts: Post-routing ECOs is critical in balancing clock insertion delays, ensuring that clk_ddr, clk_dqs_out, and clk_wr meet our exacting standards. A testament to our meticulous planning and execution! πŸ“ βš™οΈPad Delay Compensation: Adjustments to compensate for the pad delay in the DQS path are essential, ensuring alignment with the DQS pad's min and max delay. A fine example of our attention to detail! 🎯 These learnings showcase the depth of understanding needed to overcome DDR timing closure challenges. If you want to get the same depth of understanding join our SDC workshop. πŸ‘‰Contact to join the SDC workshop - https://api.whatsapp.com/send/?phone=919817182494&text=Hi+vlsideepdive%2C+I+have+a+query&type=phone_number&app_absent=0 #EngineeringExcellence #InnovationInTech #ASICDesign #DDRTimingClosure