Multi-purpose I/O
EPM-19 Hardware Reference Manual
27
M
SATA
A
CTIVITY
LED
Figure 16 shows the location of the mSATA activity LED. This LED indicates activity on the
mSATA interface. Not all mSATA drives provide this disk activity signal. Note that the FPGA
register bit for the DEBUG_LED needs to be cleared (set to 0) in order for this signal to reflect
the MSATA_DAS signal from the mSATA interface. Until that is done, it reflects the status of
the FPGA programming (set to 1 when the FPGA is programmed and reset properly). Refer to
the
EPM-19 Programmer’s Reference Manual
(available on the
) for information on FPGA registers.
Figure 16. Location of the mSATA Activity LED
B
OOTING FROM A
PCI
E
M
INICARD
The MSATA_DETECT (J2 pin 43) signal is non-functional as an option for the PCIe Minicard
mux selection. This signal has a pull-down internal to the FPGA to prevent it from floating high
(which enables it). The FPGA default is to use J2 pin 51 as the mux enable signal
(PRES_DISABLE2#) which works with all of our Minicards.
The result of this condition is that certain combinations of bootable devices may not yield
expected results. Table 9 is a matrix of acceptable boot device configurations.
Table 9: Primary Boot Device Truth Table
Installed Bootable Devices
The primary boot
device will be…
microSD card
mSATA card
External SATA Drive
USB Flash Drive
Yes
Don’t care
Don’t care
Don’t care
microSD card
No
Yes
Don’t care
Don’t care
mSATA card
No
No
Yes
Don’t care
External SATA drive
No
No
No
Yes
USB Flash Drive
Note:
Only one SATA port is available on the Vortex86DX2 SoC. If an mSATA device is
attached, the BIOS Setup utility will not recognize any device attached to the SATA connector.