Emerson MVME2500 manual Debugging Support, Post Code Indicator, Jtag Chain and Board

Functional Description

4.20Debugging Support

The following information shows the details of Emerson debugging support as applied to the MVME2500.

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 39.

Logic 1 means LED is "ON", Logic 2 means LED is "OFF"

Table 4-3 POST Code Indicator on the LED

Sequence	D33	D32	D35	Description
1	0	0	0	U-boot has been copied from SPI flash to CPU cache.
2	0	1	0	Serial console has been initialized, some text is visible
				on the terminal.
3	0	1	1	DDR has been initialized using SPD parameters,
				Execution is still in the cache.
4	1	0	0	Execution has been relocated to RAM.
5	1	0	1	PCI has been initialized.
6	1	1	0	POST routines are finished.
7	1	1	1	Additional SW routines are finished.
8	0	0	0	U-boot prompt is visible on the terminal, can start
				loading OS image from USB, Ethernet, SATA SSD, SD.

4.20.2 JTAG Chain and Board

The MVME2500 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 MVME2500 provides a 60-pin header that can connect to the JTAG board using a custom cable.

78 MVME2500 Installation and Use (6806800L01H)