Intel SROMBSASMR (AXXROMBSASMR) - Manual (Page 12)

Hardware Intel® Integrated RAID Module SROMBSASMR (AXXROMBSASMR) Technical Product Specification
2.3.2 Flash ROM
The Intel ® Advanced+ Book Block Flash Memory device is a 4 MB FLASH ROM configured for
16-bit I/O, manufactured on Intel’s latest 0.13 μm and 0.18 μm technologies. This is a feature-
rich solution for low-power applications. This device incorporates low-voltage capability (3 V
read, program, and erase) with high-speed, low-power operation. Flexible block-locking allows
any block to be independently locked or unlocked. For more information, see the Intel
® Flash
Memory web site at http://www.intel.com/design/flash .
2.3.3 Boot Strap ROM (SEEPROM)
The serial bootstrap ROM is used to configure the 1078 before the server board configures the
PCI Express* registers. The bootstrap ROM sets the PLL (Phase Lock Loop) dividers, external
memory bus speed, etc.
2.3.4 NVSRAM
A 32-KB NVSRAM stores board and disk drive setup configurations.
2.3.5 SDRAM (Cache)
The Intel ® Integrated RAID Module SROMBSASMR includes 128 MB of integrated DDR2 667-
MHz ECC SDRAM memory. It supports a three chip 40-bit memory configuration. The memory
chips are connected directly to the memory controller interface bus of the ROC and serves as
storage for the executable code transferred from the flash. It also serves as cache during RAID
transactions. Cache mode selection takes immediate effect while the server is online and is
available on a per virtual drive basis. The ROC memory controller provides single-bit ECC error
correction with multi-bit detection support.
The optional Intel ® RAID Smart Battery AXXRSBBU3 provides a battery backup option for data
cached in the memory.
Figure 3. Intel
®
RAID Smart Battery AXXRSBBU3
Revision 1.2
Intel order number E59029-003
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