F9211a00017v001 Updated !!link!!

| | Likely Cause | Solution | |------------------|-----------------|---------------| | Device fails to enumerate on PCIe | Link training timeout due to faster POST | Add 20ms delay in host BIOS or driver probe | | Intermittent SPI corruption at >20MHz | Missing drive strength configuration | Re-set SPI registers via write32 0x4001300C 0x2A | | High current draw (sleep mode) | PMIC state machine mismatch | Cycle power (not just reset) after update | | Debug port shows "Watchdog expired" | PLL lock time changed | Extend watchdog initial feed window to 150ms |

(via JTAG or debug console):

Date: May 5, 2026 | Category: Industrial Firmware & Embedded Systems | Reading Time: 6 minutes f9211a00017v001 updated