104 SBC347A 3U VPX Single Board Computer
Publication No. 500-9300527837-000 Rev. A.0
B.2 Nonvolatile Memory
The SBC347A contains nonvolatile memory, i.e., memory in which the contents
are retained when power is removed.
Table B-2 Nonvolatile Memory
Memory Type Size
User
Modifiable?
User Data
Access?
Write
Protectable? Function
Process to Clear
SATA NAND
drive
32-GByte
device
Yes
Yes
Yes
Solid State Flash drive stores
operating system or user data
Any hard drive formatting
utility. Fast Erase facility
Boot (SPI)
Flash
Three
16 MByte
devices
Yes
Yes
Yes
2 x BIOS code & ME firmware,
1 x BIT code/results
Can be cleared by any
utility capable of writing to
the PCH SPI bus
NVRAM
(FRAM)
512 KByte
devices
Yes
Yes
Yes
User defined parameters
Can be cleared by any
utility capable of writing to
I/O space
Flash
2 MByte
No
No
Yes
Ethernet device configuration Can be cleared by any
utility capable of writing to
the LAN SPI bus
FPGA
N/A
No
Yes
N/A
Powerup/reset logic, glue
logic, LPC registers, timers,
Watchdog,
NVRAM access
JTAG via TAC
EEPROM
40 Kbit
No
Yes
No
TPM key storage and user
credential storage
Proprietary software
EEPROM
Two 8-bit
registers
Yes
Yes
Yes
DIP Switch settings
BIOS set-up utility
EEPROM
8 Kbit
No
No
Yes
SPD information for onboard
SDRAM
Can be cleared by any
utility capable of writing to
the PCH I
2
C bus
EEPROM
10 bytes
No
Yes
No
Elapsed Time Indicator
DOS - proprietary software
EEPROM
256 bytes
No
Yes
No
BMM FRU data
DOS - proprietary software
Flash
256 KByte No
No
No
BMM boot code storage
Proprietary software
