SMART Embedded Computing MVME2502, Installation And User Manual

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Functional Description
MVME2502 Installation and Use (6806800R96L) 93
4.20 Debugging Support
The following information shows the details of Penguin Edge debugging support as applied
to the MVME2502.
4.20.1 POST Code Indicator
The following table shows the LED status of the POST Codes. For the location of the POST
Code LEDs, see
On-board LEDs on page 50
.
Logic 1 means LED is ON, Logic 2 means LED is OFF.
4.20.2 JTAG Chain and Board
The MVME2502 is designed to work with separate JTAG board rather than with an on-
board JTAG multiplexer. The chip supports up to a 6-scan port and the board’s boundary
scan requires the following to function: ASSET hardware, JTAG board, and JTAG cable.
The MVME2502 provides a 60-pin header that connects to the JTAG board via customize
cable.
The JTAG bypass will connect when no XMC or PMC is connected to its corresponding
locations. Once an external XMC or PMC is unmounted its corresponding JTAG bypass will
close, to complete the JTAG chain.
Table 4-8 POST Code Indicator on the LED
Sequence D33 D34 D35 Description
1 Off Off Off U-boot has been copied from SPI flash to CPU cache.
2 Off On Off
Serial console has been initialized, some text is visible on
the terminal.
3 Off On On
DDR has been initialized using SPD parameters, Execution
is still in the cache.
4 On Off Off Execution has been relocated to RAM.
5 On Off On PCI has been initialized.
6 On On Off POST routines are finished.
7 On On On Additional SW routines are finished.
8 Off Off Off
U-boot prompt is visible on the terminal, can start loading
OS image from USB, Ethernet, SATA SSD, SD.