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541
BBus Utility
ARM Wake-up register
Address: 9060 0090
The ARM Wake-up register contains the ARM wake-up word used only by Serial
Controller Interface #1. This pattern, when found as the next entry in the receive
FIFO, causes a wake-up signal to be asserted to the ARM.
Register bit assignment
D02 R/W SerB 0 Serial controller port B
0 Little endian
1 Big endian
D01 R/W USB 0 USB
0 Little endian
1 Big endian
This does not affect the USB DMA controller.
D00 R/W DMA Reset to the
value
provided on
strapping pin
gpio[44]
BBus DMA
0 Little endian
1 Big endian
This field controls both the general BBus DMA
controller and the USB DMA controller.
Bits Access Mnemonic Reset Description
Table 332: Endian Configuration register
Bits Access Mnemonic Reset Description
D31:00 R/W WAKE
0x0000_0000
Defines the byte-wise match in order for the Serial
Controller to signal a wake-up to the ARM.
Table 333: ARM Wake-up register
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
WAKE
WAKE