Intel RES2SV240 Hardware User Guide - Page 24

- The I2C interface to the external SEP provides a backwards-compatible interface to an optional external SEP - All four I2C interfaces can be configured for general-purpose use - The ARM926 processor can access all four I2C interfaces • Provides configurable drive spin-up sequencing on a per-phy basis • Provides programmable Tx and Rx signal polarity for optimization of board routing • Provides a scalable interface that supports up to 1024 SAS addresses through multiple expanders • Offers an advanced LED and GPIO interface that provides serial and parallel GPIO capabilities: - Provides a Serial General-Purpose I/O (SGPIO) interface for remote status indications - Provides 11 independent GPIO signals - Provides 72 independent LED signals and two internal port activity indicator signals that can be used as GPIOs - Provides LEDs that support drive activity, fault, and status indications • Provides debug capability via either EPP, Serial, or direct 8-bit CPU interface • Provides external memory support for Flash, NVRAM and PSBRAM Flash ROM An 8-MB CFI-compliant flash ROM is used to accommodate expander card firmware. Diagnostic Components LED Placement and Function The Intel® RAID Expander Card RES2SV240 contains the following LEDs: • One surface-mounted SXP_ACTIVE ("DS3B1") LED (Green Color) to indicate activity of the internal Sxp port operating in any of the supported protocol modes. • Another surface-mounted EXP_ACTIVE ("DS3B2") LED (Green Color) to indicate activity on the internal SMP or SSP target ports which advertise the Expander's WWN address. SAS/SATA Connectors The Intel® RAID Expander Card RES2SV240 provides six internal SFF8087 SAS/SATA signal connectors. Each SFF8087 connector provides support for four SAS/SATA ports. The sideband signals are configured to adhere to the SFF-8485 Specifications for SGPIO support. 14 Intel® RAID Expander Card RES2SV240 Hardware User's Guide