AM3517/05 ARM Microprocessor Silicon Errata (Rev. D)

AM3517/05 ARM Microprocessor Silicon Errata (Rev. D)
Silicon Revision 1.1 Usage Notes and Known Design Exceptions to Functional Specifications
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As shown in Figure 4, USB Port 1 and Port 2 can be used to connect to external high-speed PHYs which
include a ULPI port. However, in this case, the external USB PHY must be able to accept a source clock
generated by the high-speed USB controller. Also, in this usage model the USB ports cannot support fullspeed and low-speed operation. Therefore, using this approach, USB Port 1 and Port 2 cannot provide a
fully compliant USB 2.0 Type-A receptacle; a high-speed USB hub would be required in this case; please
see Figure 5.
Note: USB Port 3 does not support ULPI mode.
Port 1
12-pin ULPI
(Device Outputs Clock)
ULPI HS
(A)
PHY
Port 2
12-pin ULPI
(Device Outputs Clock)
ULPI HS
(A)
PHY
Port 3
HS Host Controller (EHCI)
Device
Not Used
A. USB port 3 does not support ULPI mode.
Figure 4. Connecting to High-Speed PHYs Using USB Ports
Port 1
ULPI HS
(A)
PHY
HS/FS/LS
Device or
Receptacle
12-pin ULPI
(Device Outputs Clock)
Not Used
HS/FS/LS
Device or
Receptacle
Port 3
12-pin ULPI
(Device Outputs Clock)
Port 2
Device
HS USB
HUB
HS/FS/LS
Device or
Receptacle
Not Used
A. USB port 3 does not support ULPI mode.
Figure 5. Connecting to a High-Speed USB Hub
8
AM3517/05 Sitara ARM Microprocessors Silicon Revisions 1.1, 1.0
SPRZ306D – October 2009 – Revised June 2012
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