PHYSICAL LAYER PRODUCT
VSC055
S P E C I F I C A T I O N S :
100-pin PQFP Package
Two Clock Input Ranges: 8 to 10MHz (crystal) or 8.0 to 53.125MHz
(Oscillator)
V S C 0 5 5 B L O C K D I A G R A M :
Enhanced I
2
C Backplane Controller
A P P L I C A T I O N S :
Any Embedded Control Application Including:
- SCSI and Fibre Channel JBODs or SBODs
- Disk Arrays
- RAID Subsystems
- Servers
- Telecommunication Equipment
F E A T U R E S :
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 Recovery and Signal Detect Support
for up to 16 Drive Ports
Eight Programmable Fan Speed Monitoring Inputs
Eight Programmable Pulse Width Modulated Fan Control Outputs
Pairing of GPI/O Pins for Direct Input/Output Signal Routing/Buffering
Selectable Direct LED Drive Flashing Capability
Pin-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
Tel: +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
V S C 0 5 5 A P P L I C A T I O N D I A G R A M :
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.
G E N E R A L D E S C R I P T I O N :
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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