Ensemble 4000 Series VME SBC4120 Module0 pages

™

DATASHEET

Ensemble 4000 Series
VME SBC4120 Module
Low-Power, Low-Cost Single-Board Computer with Flexible I/O
• VME64 6U air-cooled SBC
• 1.06 GHz dual-core, low-power MPC8640D processor
• Optimized for legacy 5V-only VME systems
• Identical software infrastructure across Mercury products
• Flexible I/O supported on dual PMC/XMC sites
The Ensemble 4000 Series SBC4120 Module from Mercury
Computer Systems combines high-performance Power
Architecture™ processing technology with balanced I/O from dual
PMC/XMC sites, designed for easy insertion into legacy VME
systems. This MPC8640D dual-core single-board computer (SBC)
requires only 5V power supplied from the backplane, and can
operate safely with the lower airflow rates often found in such
systems. The SBC4120 provides the features of a single-board
computer with a software environment that is identical to the software infrastructure across Mercury products.

Support for Legacy Systems

Low-Power Processor

Full-Featured SBC

The Freescale™ MPC8640D dual-core processor integrates two
standard e600 processor cores, two DDR2 memory controllers,
1 MB of L2 cache, and a flexible system-on-chip I/O subsystem.
The MPC8640D processor is an enhancement to the industrystandard MPC8641D processor and maintains the performance of
the MPC8641D while lowering its overall power draw. The dual
e600 cores that make up the heart of the chip are inherited from the
MPC7448 processor, and each retains the high-performance
AltiVec™ vector processing unit. Algorithms optimized for the
AltiVec engine port seamlessly to the MPC8640D. Increased bandwidth between both memory and external I/O and the processing
cores allows efficient processing beyond that available with prior
families of Freescale processors.

The SBC4120 balances processing power with flexible I/O via
built-in serial and Gigabit Ethernet and dual PMC/XMC mezzanine sites. In addition to the sophisticated management subsystem
and fabric interconnect, the SBC4120 provides users with a toolkit
enabling many different application use cases.

Mezzanine Card Flexibility
Each of the standard PMC/XMC sites can be configured with offthe-shelf mezzanine cards using either PCI-X or PCI Express® protocols. PMC cards are supported with a PCI/PCI-X interface at up
to 133 MHz on the primary site, and up to 100 MHz on the secondary site. PMC user-defined I/O is mapped to the backplane on
one of the two PMC sites. XMCs are supported with x8, x4, x2, and
x1 PCIe mezzanine cards per the VITA 42.3 standard.

The SBC4120 incorporates several features that simplify insertion
into legacy VME systems. Many legacy VME backplanes supply
only +5V, +12V, and -12V power inputs for payload modules and
any mezzanines mounted on them. The SBC4120 does not require
any additional voltages beyond 5V to function. The module is also
optimized for high mean-time between failures (MTBF) in lower
air-flow environments. The integrated 2eSST VMEbus interface
allows fast data movement among 2eSST-enabled modules on the
same legacy VME backplane.

Serial

RJ45

RJ45

GigE

GigE

System
Management Block

512 MB
DDR2

864xD
Dual-Core
PPC

512 MB
DDR2
128 MB
Flash

RTC

I2C
x8 PCIe

I2C
to P1

PCI Express
Switch

PMC/XMC Site

x8
PCIe

x4
PCIe

x4
PCIe

PMC/XMC Site

x8
PCIe

J15

J25
J23

J21

J24

J22

PMC User
I/O

PCI-X/PCIe
Bridge

UART
to P2

PCI-X/PCIe
Bridge

VME 2eSST

PCI-X

J11

VME
Bridge

J13

J12

J14
PMC User
I/O

Figure 1. VME SBC4120 Module functional block diagram

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