Microchip Technology EEC1005-I/SX1-UB1

Overview

EEC1005-I/SX1-UB1 from Microchip Technology is a universal storage backplane management processor supporting SFF-TA-1005 UBM over I²C, SFF-8654 HFC, SFF-8639 U.2 and SFF-TA-1001 U.3 DFC interfaces, with secure boot (AES-256/ECDSA P-256/SHA-256), up to 8 I²C ports, and hardware-accelerated SGPIO for SAS/SATA backplanes - deployed in enterprise rack-mount storage enclosures for NVMe/SAS/SATA drive monitoring and LED status control.

For engineers reviewing the EEC1005-I/SX1-UB1 datasheet, EEC1005-I/SX1-UB1 pinout, EEC1005-I/SX1-UB1 application, or EEC1005-I/SX1-UB1 equivalent, key selection criteria include UBM/SGPIO interface configurability via analog CONFIG_PIN, support for up to 16 drives (SAS/SATA) or 12 NVMe drives, PERST signal monitoring per DFC, IFDET/PRSNT detection, and dual FRU memory (UBM + Generic) at I²C addresses 0xAE and 0x54.

Technical Context

The EEC1005-I/SX1-UB1 implements a configurable UBM controller architecture that routes sideband signals (PERST, IFDET, PRSNT) between host-facing connectors (HFCs) and drive-facing connectors (DFCs), with firmware-defined behavior determined by an analog voltage on the CONFIG_PIN at power-up. It supports both direct-attach (BMC-managed) and host-attach (HBA-managed) topologies.

It integrates three distinct FRU memory spaces: UBM FRU (256-byte, read-only, I²C address 0xAE), Generic FRU (256-byte, read/write, I²C address 0x54), and Configuration FRU (256-byte, BMC-accessible), all used to initialize device identity, drive count, LED patterns, and silicon vendor data at runtime without firmware reflash.

Key Specifications

Pinout & Package

EEC1005-I/SX1-UB1 is packaged in a RoHS-compliant 144-pin WFBGA (6.0 mm × 6.0 mm, 0.4 mm pitch), as confirmed in DS00003392B-page 48 and page 10 Table 3-1 (ID 03–04, 07, 09–0D). Pin functions are configuration-dependent and defined across multiple pinout tables (e.g., Table 10-1 for 144-pin SGPIO, Table 10-2 for 144-pin UBM).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar storage backplane management applications.

Compared with EEC1004, EEC1005-I/SX1-UB1 enables larger-scale deployments (12–16 drives) and full U.3 compliance; compared with EEC1006, it lacks Gen4 lane muxing and extended temp rating but offers identical UBM/SGPIO functionality at lower cost and power.

Availability

EEC1005-I/SX1-UB1 is available at Aetrix Electronics and suitable for enterprise storage enclosures, NVMe rack servers, and SAS/SATA JBOD systems requiring stable component supply, long-term lifecycle support, and validated UBM/SGPIO interoperability with major HBA and BMC vendors.

Supply support for EEC1005-I/SX1-UB1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, FPGAs, and connectivity solutions, serving automotive, industrial, communications, and computing markets with secure, reliable silicon.

The EEC1005 product line delivers enterprise-grade backplane management processors designed specifically for SFF-compliant storage enclosures, enabling scalable, secure, and standards-based drive monitoring and control in hyperscale and edge data centers.

FAQ

What communication protocols does the EEC1005-I/SX1-UB1 support for host-to-backplane management?

The EEC1005-I/SX1-UB1 supports SFF-TA-1005 Universal Backplane Management (UBM) over I²C and SFF-8485 Serial GPIO (SGPIO) with up to four hardware-accelerated lanes. It also implements SFF-8654 HFC, SFF-8639 U.2, and SFF-TA-1001 U.3 physical layer signaling. All protocols are selected at boot via the CONFIG_PIN voltage, and the EEC1005-I/SX1-UB1 responds to standard SES commands and IBPI LED patterns per specification.

How does the EEC1005-I/SX1-UB1 handle secure firmware updates and boot authentication?

The EEC1005-I/SX1-UB1 performs hardware-accelerated secure boot using AES-256 decryption, ECDSA P-256 signature verification, and SHA-256 hashing before loading firmware from internal flash. It supports secure firmware updates with rollback protection and key revocation via lockable OTP memory. These features ensure only authenticated, unmodified code executes on the EEC1005-I/SX1-UB1, meeting enterprise security requirements for storage infrastructure.

What is the role of the CONFIG_PIN on the EEC1005-I/SX1-UB1, and how is it used?

CONFIG_PIN is an analog input that samples a resistor-divider voltage (0.1 V to 1.3 V) at power-up to select the EEC1005-I/SX1-UB1's operational mode. This determines pinout mapping, number of HFCs (1–6), number of DFCs (4–16), interface type (UBM vs. SGPIO), and enabled features (e.g., U.2 vs. U.3, full vs. minimum feature set). The configuration is fixed at boot and cannot be changed dynamically.

Does the EEC1005-I/SX1-UB1 support both U.2 and U.3 drive connectors, and what are the differences in implementation?

Yes, the EEC1005-I/SX1-UB1 supports both SFF-8639 U.2 and SFF-TA-1001 U.3 DFCs. U.3 support includes IFDET2# for enhanced drive presence detection per SFF-TA-1001, while U.2 uses standard IFDET#/PRSNT#. Configuration is selected via CONFIG_PIN voltage (e.g., ID 08/09 for U.3, ID 05/06 for U.2), and both operate under the same UBM protocol stack with identical FRU and LED management capabilities.

How many independent FRU memory spaces does the EEC1005-I/SX1-UB1 provide, and what are their I²C addresses and purposes?

The EEC1005-I/SX1-UB1 provides three independent FRU memory spaces: (1) UBM FRU (256-byte, read-only, I²C address 0xAE) for SFF-TA-1005-compliant backplane identification; (2) Generic FRU (256-byte, read/write, I²C address 0x54) for customer-defined data storage; and (3) Configuration FRU (256-byte, BMC-accessible) for runtime initialization of HFC count, LED patterns, and device identity. Each serves a distinct, non-overlapping purpose in the storage management stack.