Technical data

Functional Description

MVME2502 Installation and Use (6806800R96B)

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 Onboard LEDs, on page 46.

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 onboard

JTAG multiplexer. The chip can support 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 can connect 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 un-mounted its corresponding JTAG bypass will close, to

complete the JTAG chain.

Table 4-7 POST Code Indicator on the LED

Sequence D33 D32 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.