SSC050 Datasheet | Vitesse

Overview I2C Serial Interface The SSC050 uses an I2C serial interface to municate with embedded controllers such as Vitesse’ s SSC100/200 and VSC205/210. The slave interface on the SSC050 uses a three-bit (A2:0) addressing scheme for identification on the serial interface. The ASEL pin determines the four-bit device type identifier. Up to sixteen, SSC050 or VCS055 devices may reside on a single I2C serial interface. I/O Pins The SSC050 has forty bi-directional I/O pins. The functionality of these pins is configurable via programming of the SSC050. All I/O pins have a 12m A drive strength and support 3.3V TTL. To enable the designer to configure and program the SSC050, the forty I/Os are arranged in registers of eight pins. Certain groups of pins have additional functionality beyond simple input or output to support the integrated fan speed sensors and FC-AL port bypass control. Device Features I2C Serial Interface (DC to 400Khz) 4 Fan Speed Monitor Inputs 40 Programmable, Bi-directional I/O Pins Flexible FC-AL Port Bypass Control Logic Bit Programmable Interrupt Control Seven LED Flash Rates 64 PQFP Package Cu or Optics PBC_EN VSC7120 Local I/O (x8) VSC7120 VITESSE Embedded Controller (SSC100) Flash (64K x 8) PBC_EN1 PBC_EN2 PBC_EN3 PBC_EN4 PBC_EN X24C16 EEPROM Drive Bay 1 VSC7122 Drive Bay 2 Drive Bay 3 Drive Bay 4 I C Serial Interface Temperature Sensor (LM75) VITESSE Backplane Controller (VSC050) Power Supplies LEDs (x8) Fans (x4) Application for a Single Loop, Single Controller with Four Drives . LED Flash Rate Control The built-in flexibility of the SSC050 allows all forty of the I/O pins to drive LEDs through a pull-up resistor. Each pin is independently programmed to flash an LED at one of seven predefined flash rates. FC-AL Port Bypass Control Up to sixteen of the forty I/Os may be configured to monitor and manage FC-AL port bypass control devices. Eight pairs of I/Os include special logic to monitor Enable Bypass signals, which may be...