Artesyn MVME2502 Installation and Use (April 2015) - Manual (Page 106)

Functional Description
MVME2502 Installation and Use (6806800R96E) 106
4.19 Real-Time Clock Battery
The MVME2502 provides a through hole socket for a CR2325 190mAh lithium battery to
provide backup power for the on-board RTC when primary power is unavailable.
4.20 Debugging Support
The following information shows the details of Artesyn 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 60 .
Logic 1 means LED is "ON", Logic 2 means LED is "OFF"
Table 4-7 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.