PHYSICAL LAYER PRODUCT
VSC425
S P E C I F I C A T I O N S :
144-PQFP Package (Optional 144-TQFP Package)
External Flash and/or SRAM (60ns to 250ns)
Internal 8KB User Data SRAM
V S C 4 2 5 B L O C K D I A G R A M :
Enhanced Serial ATA Enclosure Management Controller
A P P L I C A T I O N S :
Serial ATA JBODs
Disk Arrays
RAID Subsystems
Servers
F E A T U R E S :
Device Features:
- Four IPMB or Multi-Master I
2
C Serial Interface Controllers
- 32-bit, RISC CPU with Debug Port
- Two UARTs (one with modem control)
- 8 Input 10-bit ADC, 8 Optional PWM Outputs and 8 Optional Fan
Tachometer Inputs
- Up to 50 Programmable General Purpose I/Os
- Optional LPC and X-Bus System Interfaces
- Block Transfer, KCS and SMIC Logical Interfaces
- Secondary Timer with Optional External Count Source
- PLL for use with Low Frequency/Cost Crystals
- User Definable Clock from 20-50MHz
- Four External 1MB Address Ranges
Software Development Kit (SDK) Features:
- Support for Both SES and SAF-TE Protocols over I
2
C (IPMB)
- Modular Architecture to Support Migration to other I/O Technologies
and protocols
- Extensive Peripheral Device Library
- Sample Personality Module Source Code
DATACOM PRODUCTS
PB-VSC425-001
I
2
C
Serial I/F
(x4)
Serial
ICE
General
Purpose
UART(x2)
External
Memory
I/F
Timer
INT
Cont.
R3000 CPU
Bus
I/F
Unit
8KB SRAM
PLL
KCS/SMIC
Control Registers
KCS/SMIC
Control Registers
KCS/SMIC
Control Registers
Block Transfer
Interface
8 Input
10 bit
ADC
GPIO(x18)
or
XBUS/LPC
Interface
GPIO
(x32)
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 VSC425 is an embedded controller
tailored for Serial ATA Enclosure Management
applications. The VSC425 supports both Serial
ATA Enclosure Management Bridge (SEMB)
Controller and Storage Enclosure Processor
(SEP) applications. Four I
2
C serial multi-master controllers and
two general purpose UARTs allow system designers to mix and
match IPMB and private I
2
C configurations to best meet the
requirements of a particular system. The VSC425 includes a
high performance, 32-bit RISC processor, which provides
the processing bandwidth and addressability required for
V S C 4 2 5 A P P L I C A T I O N D I A G R A M :
sophisticated enclosure management strategies. An on chip ADC
provides power supply measurement capability without the need
for additional active components.
The VSC425 is ideal for remote monitoring and control applications
such as Serial ATA storage subsystems and entry through high-
end servers. The embedded firmware capabilities of the VSC425
allow storage system architects to differentiate their products via
firmware. A complete Software Development Kit (SDK) and
evaluation board is provided to accelerate the development of
firmware specific to the enclosure.
G E N E R A L D E S C R I P T I O N :
Enhanced Serial ATA Enclosure Management Controller
VSC425
VITESSE
Backplane
Controller
(VSC055 and
SSC050-01)
Temp
Sensors
Flash
Memory
I
2
C
EEPROMs
Power
Supplies
(GPIO)
LED's
Fans
Intrusion
Switches
VSC425
SEP
Serial ATA
Concentrator
(RAID Controller,
Switch, Host
Bus Adapter)
Drive Control
and Status
(Tach, GPIO)
(GPIO)
(GPIO)
(Additional
Tach, PWM,
GPIO, Etc.)
GPIO
Serial ATA
Drive
Serial ATA
Drive
Serial ATA
Drive
Serial ATA
Drive
I
2
C
(SES or SAF-TE)
VSC425
SEMB
Controller
(I
2
C, LPC or XBUS)
Serial ATA (Data)
Serial ATA (Data)
Serial ATA (Data)
Serial ATA (Data)
GPIO
I
2
C
UARTs
UARTs
Flash
Memory
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