LSI 25083 manual Example of an LSI SAS Direct-Connect Application

(PSBRAM), nonvolatile static random access memory (NVSRAM), and Flash ROM.

Figure 1.1 Example of an LSI SAS Direct-Connect Application

SAS/SATA II Device

SAS/SATA II Device

SAS/SATA II Device

SAS/SATA II Device

SAS

PCI Express

RAID Controller

32-Bit Memory

Address/Data

Bus

I2C

Interface

Flash ROM/

PSBRAM/ NVSRAM

I2C

PCI Express Interface

Figure 1.2 shows an example of a SAS RAID controller configured with an LSISASx12 expander that is connected to SAS drives, SATA II drives, or both.

Figure 1.2 Example of an LSI SAS RAID Controller Configured with an LSISASx12 Expander

PCI Express Interface

8

SAS RAID Controller

LSISAS2108 PCI Express to SAS ROC

Peripheral

Bus

72-bit DDR/DDR2

with ECC

Interface

Flash ROM/

NVSRAM/ I2C/UART

SRAM

SDRAMRAM

LSISASx12 Expander

LSISASx12 Expander

Configuration Scenarios 1-7

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