The SCP interface of the USB3_PHY PLL controller (DPLLCTRL_USB_OTG_SS instance) is used to set the configuration of the DPLL modules, primarily the various counter values. Figure 26-11 is an overview of the DPLL clock generator embedded into the USB1 controller subsystem.
The DPLL_USB_OTG_SS features:
- A programmable 8-bit input divider: N
- A programmable 12-bit integer, 18-bit fractional loop multiplier: M
- Digital control and loop filter
- Internal oscillator output clock on internal LDO domain (CLKDCOLDO output)
- DPLL output clock SSC (spread spectrum clocking) support
- No retention capabilities
- No Idle-bypass fast relock capabilities
- Idle-bypass low-power mode
- M/N bypass mode
- Relock from standby
The DPLLCTRL_USB_OTG_SS components features:
- DPLL error and status notification
- DPLL initialization and configuration
- DPLL lock criteria selectable between frequency and phase lock
- Idle command implementation
- No software reset implementation
- Automatic enable/disable control, synchronized with USB1 controller PIPE port commands to set USB3_PHY to P1, P2, and P3 low-power states