Dual SGPIO Backplane Controller

The MAX72408 is a dual serial general-purpose input/output (SGPIO) backplane controller. It is intended for system designers and software and firmware developers using this device to support enclosure management functions or other related I/O expansion tasks. The device can be used in any embedded control application including SAS or SATA where the monitoring of and control of a large number of digital I/O signals is required.

Applications

* IO Expansion Over I²C * SBB Storage Enclosures (JBODs) * Server-Based Hard Drive Backplanes

* Common Features

* Dedicated Slave Mode I²C Interface

* Autoload I²C Master Interface—Can Share with Up to Eight MAX72408 Devices

* I²C Slave Interface—Can Share with Up to Eight MAX72408 Devices

* Interrupt Output—Can Configure for Open Drain or Active Drive

* High-Impedance Inputs (Nonclamping)

* 5V Tolerant I/O Using 3.3V Technology

* On-Board 3.3V to 1.8V LDO Regulator for Core Logic

* Internal Power-On Reset

* SGPIO Features

* Support for Up to Eight Drives Per Device—Cascaded Devices Can Support Up to 64 Drives

* Mated/Present and SATA Pin 11 Activity Input for Each Drive

* Activity and Status Light-Emitting Diode (LED) Output for Each Drive

* Implements SGPIO IBPI (SFF-8489 Rev 0.1)

* Two 24-Bit SGPIO Master/Slave Interfaces

* Operates in One of Three Modes for Dual or Single Slave Operation

* GPIO Features

* Eight Optional Fan-Speed Monitor Inputs

* Eight Optional Pulse-Width-Modulation (PWM) Outputs

* Up to 40 User-Defined Pulse-Train Outputs

* Up to 40 Edge-Sensitive Inputs for Interrupt Generation

* Up to 40 General-Purpose Input/Output (GPIO) Under User Control