SPRUJB6B November 2024 – May 2025 AM2612
The USB2SS contains several functional clock domains: BUS, PHYMMR, and UTMI+ Interface.
Table 13-159 provides the details of the clock drivers and the control of the clocks.
| Clock Signal | Clock Source | Max Frequency |
|---|---|---|
| OCP/AXI (OCP_CLK) Clock for the AXI and OCP interfaces and most of the internal logic of the controller. The AXI (primary) and OCP (secondary) interfaces can run on different clock ratios. The clock is turned on/off according to the sidlereq/ack handshake. |
SYS_CLK | 200 MHz |
| SUSPEND_CLK This clock can be used to run a limited portion of the controller when bus is idle. The suspend clock can be turned on/off according to the sidlereq/ack handshake. |
XTALCLK | 25 MHz |
| PHY_CLK Standard clock provided by the on-chip USB2 UTMI PHY. |
USB0_CLK | 60 MHz |
| USB_WAKEUP_CLK Clock for wakeup logic of the controller. |
RCCLK32K | 32 KHz |