Artesyn ATCA 7370 / ATCA 7370-S Installation and Use (June 2014) - Manual (Page 246)

Firmware Upgrade
ATCA-7370/ATCA-7370-S Installation and Use (6806800P54F) 246
10.3 BIOS/FPGA Update
Both BIOS and FPGA components have two independent boot banks.
Both BIOS and FPGA boot banks can be upgraded with HPM.1. IPMC support automatic boot
bank switching, which is mandaory for HPM.1 to activate. The newly upgrade firmware can be
activated with a payload power cycle if you upgraded the firmware with activate option.
Payload always has access to the active boot bank and the IPMC always has access to the
inactive boot bank. All HPM.1 commands are directed to the inactive boot bank (this includes
"get component properties"). The following figure shows the connection of the SPI busses
which are switched with "Set System Boot Options" -> Boot Bank (parameter 0x96). Description
can be found in the
System Boot Options Parameter #96 on page 188 .
Figure 10-2 SPI Busses Connection