abaco systems XVR16 Series, Hardware Reference Manual, Page: 150 / 151

150 XVR16*4th Generation Intel® Core™ i7 Based Rugged VME Single Board Computer Publication No. 500-9300007876-000 Rev. C.0
E • Statement of Volatility
E.1 Volatile Memory
This product contains volatile memory, i.e. memory in which the contents are lost
when power is removed.
E.2 Non-Volatile Memory
This product contains non-volatile memory, i.e. memory in which the contents are
retained when power is removed.
Table E-2 Non-Volatile Memory
NOTE
In normal operation, all non-volatile memory except the FRAM (NVRAM U192) and optional SATA NAND
(U190, U191) are write protected. In order to allow writes to these devices, or to change the write status
of the NVRAM/NAND in the BIOS/UEFI setup, a jumper must be installed on header P6. See
Figure 5-1,
XVR16 Top View Interface of Levels 1, 2, 3 Version,
on page 35
for location of header P6.
Table E-1 Volatile Memory
Type of Memory Size
User
Modifiable
User Data
Access
Function Process to Clear
SDRAM - 1.35 V 8, 16 GByte Yes Yes Contains run-time data Cleared upon power- off
Type of Memory Size
User
Modifiable
User Data
Access
Function Process to Clear
U192 - NVRAM FRAM 55nS 3.3
V FRAM (MRAM) Ferroelectric
Nonvolatile RAM
512 KByte Yes Yes Storage of user specific
information
This memory space can be
cleared by any utility
capable of writing IO
Space
U139,U140,U141 - SPI Flash
3.3 V
16 MByte Yes Yes Contains BIOS code, ME
Firmware and BIOS
settings
This memory space can be
cleared by any utility
capable of writing to the
PCH SPI bus
U190, U191 - (Optional) SATA
NAND Drive, 3.3 V, 1.2 V
8/32 GByte Yes Yes Solid State Flash Drive Any hard drive formatting
utility
U144 - FPGA 3.3 V N/A No No Power up / reset logic,
glue logic, LPC registers,
Timers, Watchdog,
NVRAM Access
JTAG via rear connector
U197 - I
2
C EEPROM 3.3 V 8 Kbit Yes Yes SPD information for
DDR3 Memory
This memory space can be
cleared by any utility
capable of writing to the
PCH I
2
C bus
U5 - EEPROM 3.3 V 32 kB Yes Yes User EEPROM This EEPROM can be
cleared by any utility that
can access the I
2
C/SMBus
U166-169 - (Optional) SPI
Flash 3.3 V
2 kB Yes Yes Storage of Intel
WGI210IT Ethernet
Configuration
This memory space can be
cleared by any utility
capable of writing to the
LAN SPI bus.