Cyclone V Device Datasheet

ID 683801
Date 5/23/2023
Document Table of Contents

USB Timing Characteristics

PHYs that support LPM mode may not function properly with the USB controller due to a timing issue. It is recommended that designers use the MicroChip USB3300 PHY device that has been proven to be successful on the development board.

Table 47.  USB Timing Requirements for Cyclone® V Devices
Symbol Description Min Typ Max Unit
Tclk USB CLK clock period 16.67 ns
Td CLK to USB_STP/USB_DATA[7:0] output delay 4.4 11 ns
Tsu Setup time for USB_DIR/USB_NXT/USB_DATA[7:0] 2 ns
Th Hold time for USB_DIR/USB_NXT/USB_DATA[7:0] 1 ns
Figure 10. USB Timing Diagram