physical layer product VSC055 specifications: 100-pin pqfp package t wo clock input ranges: 8 to 10mhz (crystal) or 8.0 to 53.125mhz (oscillator) VSC055 block diagram: enhanced i 2 c backplane controller applications: any embedded control application including: - scsi and fibre channel jbods or sbods - disk arrays - raid subsystems - servers - telecommunication equipment features: up to 64 bits of 5 volt tolerant, user-definable, bi-directional general purpose i/o slave mode i 2 c serial interface integrated port bypass, clock recover y and signal detect support for up to 16 drive ports eight programmable fan speed monitoring inputs eight programmable pulse width modulated fan control outputs p airing of gpi/o pins for direct input/output signal routing/buffering selectable direct led drive flashing capability p in-programmable addressing for up to 16 devices on a single serial bus datacom products pb-VSC055-001 pbc control 64 general purpose i/o (gpio) pins pwm control i/o and led control fan speed sensors i 2 c slave interface
for more information on vitesse products visit the vitesse web site at www.vitesse.com or contact vitesse sales at (800) vitesse or sales@vitesse.com ?2003 vitesse semiconductor corporation 741 calle plano camarillo, ca 93012, usa t el: +1 805.388.3700 fax: +1 805.987.5896 www.vitesse.com the VSC055 enhanced i 2 c backplane controller is an integrated cmos circuit that significantly reduces system cost by integrating all of the digital logic typically required to monitor a storage enclosure. the VSC055 may be used in any embedded control application including parallel scsi, fibre channel or any other application where the monitoring and control of a large number of digital i/o signals is required. programming the VSC055 is easy through a VSC055 application diagram: convenient programming model, which reduces the overall duration of the design-in cycle. data is read from and written to the device over an addressable i 2 c serial interface, allowing multiple VSC055 devices on a single two-wire bus. furthermore, a key strength of the VSC055 is the ease in which it interoperates with vitesse fibre channel port bypass circuits (pbc) and enclosure management controllers, to provide a complete storage control chipset. general description: enhanced i 2 c backplane controller VSC055 flash (1m x 8 or rs-485 xcvr power supplies & fans lm75 (temp) flash (1m x 8 or 512k x16) x24c16 eeprom lm75 (temp) 512k x 16) x24c16 eeprom rs-485 xcvr drive 7 drive 8 drive 9 drive 10 drive 11 drive 12 drive 1 drive 2 drive 3 drive 4 drive 5 drive 6 drive 13 drive 14 local i/o (x26) local i/o (x26) arbitrated loop a arbitrated loop b heartbeat downstream downstream upstream upstream drive present and fault leds drive present and fault leds power supply control, power supply control, icmb (opt.) icmb (opt.) fan tachs and pwm fan tachs and pwm gpios gpios enclosure controller vitesse backplane controller VSC055 vitesse backplane controller VSC055 vitesse enclosure controller vsc120 vitesse vsc120 2 gb/s port bypass circuits (vitesse vsc7147 or vsc7197) 2 gb/s port bypass circuits (vitesse vsc7147 or vsc7197) i 2 c i/f i 2 c i/f i 2 c i/f
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