pcgcctl
This register is available in Host and Device modes. The application can use this register to control the core's power-down and clock gating features. Because the CSR module is turned off during power-down, this register is implemented in the AHB Slave BIU module.
| Module Instance | Base Address | Register Address |
|---|---|---|
| usb0 | 0xFFB00000 | 0xFFB00E00 |
| usb1 | 0xFFB40000 | 0xFFB40E00 |
Offset: 0xE00
Access: RW
Important: To prevent indeterminate
system behavior, reserved areas of memory must not be accessed by software or
hardware. Any area of the memory map that is not explicitly defined as a register
space or accessible memory is considered reserved.
| Bit Fields | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
Reserved |
|||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Reserved |
l1suspended RO 0x0 |
physleep RO 0x0 |
Reserved |
rstpdwnmodule RW 0x0 |
Reserved |
stoppclk RW 0x0 |
|||||||||
pcgcctl Fields
| Bit | Name | Description | Access | Reset | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 7 | l1suspended | Indicates that the PHY is in deep sleep when in L1 state.
|
RO | 0x0 | ||||||
| 6 | physleep | Indicates that the PHY is in Sleep State.
|
RO | 0x0 | ||||||
| 3 | rstpdwnmodule | This bit is valid only in Partial Power-Down mode. Theapplication sets this bit when the power is turned off. The application clears this bit after the power is turned on and the PHY clock is up. The R/W of all core registers are possible only when this bit is set to 1b0.
|
RW | 0x0 | ||||||
| 0 | stoppclk | The application sets this bit to stop the PHY clock (phy_clk) when the USB is suspended, the session is not valid, or the device is disconnected. The application clears this bit when the USB is resumed or a new session starts.
|
RW | 0x0 |