Intel SROMBSASMR (AXXROMBSASMR) User Manual download pdf (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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Intel SROMBSASMR (AXXROMBSASMR) User Manual Page 12