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SUMIT-104 SBC with Intel Z5xx Atom

Intel Z5xx Atom processor and support for SUMIT, ISA, and SPX expansion.
Features extremely low power draw and fanless operation.
Extended temperature version available

  • SUMIT™ and PC/104™ Compatible
    Supports SUMIT and ISA expansion on a compact, highly rugged format.
  • Intel Z5xx Atom™ Processor
    Up to 1.6 GHz performance with only 7W power draw.
  • Fanless Operation
    No moving parts required for CPU cooling.
  • Extended Temperature Version
    -40 to +85C fanless operation for harsh environments.
  • System RAM
    Up to 2 GB socketed RAM for system flexibility.
  • High-performance Video
    LVDS flat panel output. Optional analog support.
  • Network Support
    Gigabit Ethernet with boot ROM support.
  • USB I/O
    Three USB 2.0 ports support keyboard, mouse, and other devices.
  • Device I/O
    Four serial ports, IDE interface, and HD audio.
  • Disk on Module Flash Socket
    Supports removable, bootable DOM storage.
  • SPX™ Module Interface
    Supports expansion with versatile SPX add-on I/O modules
  • OS Compatibility
    Windows XP, Windows Embedded XPe/CE, Linux, VxWorks, QNX, DOS


The Ocelot is a compact, rugged, single board computer (SBC) which features Intel’s 45 nm Z5xx Atom processor designed specifically for embedded applications. This compact SUMIT-104 SBC is ideal for defense, aerospace, medical device, robotics, and factory automation applications where high-performance, fanless, extended temperature operation is required.

Based on the industry standard PC/104 footprint, the Ocelot features the SUMIT expansion interface. This provides OEMs with a stackable multi-board expansion interface that supports both high- and low-speed signals. This simplifies adding both standard and custom I/O boards to the system. The Ocelot expansion interfaces include PCIe, USB, LPC, SPI, SMBus, as well as ISA bus support for PC/104 modules.

Like all VersaLogic products, the Ocelot is designed to support OEM applications where high reliability and long-term availability are required. From application design-in to 5+ guaranteed years of production life, the Ocelot provides a durable embedded computer solution with an exceptional cost of ownership. The Ocelot is manufactured and tested to the highest quality standards and is fully RoHS compliant. Customization is available, even in low OEM quantities.

Based upon Intel’s 45 nm Hi-k metal gate silicon technology, the Z5xx Atom processor offers very high performance (up to 1.6 GHz) with excellent power management capabilities.

The on-board features include gigabit Ethernet, three USB 2.0 ports, four serial ports, IDE interface, HD audio, and SPX expansion interface. An IDE-based Disk on Module site offers bolt-down, bootable flash storage. The highly-integrated processor facilitates fast on-board transfers, high-speed memory access, and integrated high-performance video with flat panel LVDS or optional analog video output. An SO-DIMM socket supports up to 2 GB of DDR2 RAM.

The SUMIT interface provides three x1 PCIe lanes, LPC, SPI, SMBus, and four additional USB channels. The PC/104 connector provides ISA bus compatibility for many off-the-shelf I/O boards. The pass-through versions provide PC/104 stack-down capability to support custom baseboards that may be larger than the Ocelot.

The Ocelot draws about 7W typically, but the built-in ACPI 2.0 power management allows the board to enter sleep mode for greater power savings (typically 1W between transactions).

Available in both standard (0 to +60C) and extended (-40 to +85C) temperature versions; the Ocelot meets MIL-STD-202G specifications for shock and vibration. The Ocelot supports reliable field operation with fanless operation and transient voltage suppression (TVS) for electrostatic discharge (ESD) protection.

The Ocelot features an embedded BIOS with OEM enhancements from Phoenix Technologies. The field reprogrammable BIOS supports custom defaults and the addition of firmbase applications for security processes, remote booting, and other pre-OS software functions. The Ocelot is compatible with a variety of popular operating systems including Windows, Windows Embedded, Linux, VxWorks, and QNX.

Ordering Information
Model Processor Speed Power Operating Temp. Cooling Features
VL-EPMs-21a Intel Atom 1.6 GHz 7.5W - ACPI 0 to +60C Fanless Pass-through
VL-EPMs-21b Intel Atom 1.33 GHz 6.5W - ACPI -40 to +85C Fanless Pass-through
VL-EPMs-21g Intel Atom 1.6 GHz 7.5W - ACPI 0 to +60C Fanless  
VL-EPMs-21h Intel Atom 1.33 GHz 6.5W - ACPI -40 to +85C Fanless  


Part No. Description RoHS
VL-CBR-1008* ATX power adapter cable
VL-CBR-2010 20” 18-bit LVDS flat panel (Hirose)
VL-CBR-2011 20” 18-bit LVDS flat panel (JAE)
VL-CBR-2012* 20” 24-bit LVDS flat panel (Hirose)
VL-CBR-2014* LVDS to VGA adapter board
VL-CBR-4405* 1” connector IDE adapter board
VL-CBR-4406* IDE cable
VL-CBR-5009A 18" I/O ribbon cable
VL-CBR-5012* I/O cable set and paddleboard
VL-CKR-OCEL Development cable kit
VL-ENCL-5D Development enclosure  
VL-F20-xxxx Disk on Module (IDE)
VL-HDD25-100 100 GB 2.5” IDE hard drive
VL-HDW-105* SUMIT standoff package - metric thread
VL-HDW-108 Nylon screw kit - metric thread
VL-MM8-xxxxx DDR2 RAM module

* Included in VL-CKR-OCEL cable kit


General Board Size PC/104 standard: 90 mm x 96 mm (3.55" x 3.78")
Processor Intel Atom Z530P (VL-EPMs-21a/g)
Intel Atom Z520PT (VL-EPMs-21b/h)
Chipset US15WP (VL-EPMs-21a/g)
US15WPT (VL-EPMs-21b/h)
Power Requirements +5V running Windows XP with 2 GB RAM, keyboard, and mouse:
Active Sleep (S3)
VL-EPMs-21a/g 1.5A (7.5W) typ. 0.2A (1W) typ.
VL-EPMs-21b/h 1.3A (6.5W) typ. 0.2A (1W) typ.
System Reset & Hardware Monitors Watchdog timeout (1 to 255 sec. with 1 sec. resolution; 1 to 255 min. with 1 min. resolution). All voltage rails monitored.
Expansion SUMIT, PC/104 (ISA), SPX
RoHS Compliant
Environmental Operating Temperature 0 to +60C (VL-EPMs-21a/g)
-40 to +85C (VL-EPMs-21b/h)
Storage Temperature -40 to +85C
Airflow Requirements 150 LFPM from +60 to +85C (VL-EPMs-21b/h)
Thermal Shock 5C/min. over operating temperature
Humidity Less than 95%, noncondensing
Vibration, Sinusoidal Sweep MIL-STD-202G, Method 204, Modified Condition A: 2g constant acceleration from 5 to 500 Hz, 20 minutes per axis
Vibration, Random MIL-STD-202G, Method 214A, Condition A: 0.02g/Hz (5.35g rms), 15 minutes per axis
Mechanical Shock MIL-STD-202G, Method 213B, Condition J: 30g half-sine, 11 ms duration per axis
Memory System RAM One SO-DIMM socket. Up to 2 GB DDR2 SDRAM.
Flash Interface Right angle IDE DOM with retention screw
Video General Integrated high-performance video. Intel GMA 500 graphics core supports advanced 3D graphics and high-definition video decode.
OEM Flat Panel Interface 18/24-bit LVDS interface. CMOS-selectable TFT panel types.
Desktop Display Interface Analog output via optional adapter cable*
Network Interface Ethernet* Autodetect 10BaseT/100BaseTX/1000BaseT port
Network Boot Option Intel boot agent (included): supports PXE protocol. Argon Managed Boot Agent (optional with royalty fee): supports PXE, RPL, NetWare, TCP/IP (DHCP, BOOTP) remote boot protocols.
Device I/O USB*‡ Three USB 2.0/1.1 ports (one client and two host)
IDE Interface ATA-6, UDMA66/100 interface. 44-pin 2 mm connector.
COM 1, 2, 3 & 4 Interface* RS-232/422/485 selectable. 16C550 compatible. 460 Kbps.
Audio Stereo HD audio in/out
Other Four additional USB ports available through SUMIT interface with the appropriate adapter board
Software BIOS Phoenix Technologies Embedded BIOS with OEM enhancements. Field reprogrammable. Support for USB keyboard/mouse and USB boot. User-configurable CMOS defaults.
Sleep Mode ACPI 2.0 compatible
Operating Systems Compatible with most x86 operating systems, including Windows, Windows Embedded, Linux, VxWorks, and QNX

*TVS protected port (enhanced ESD protection)
‡Power pins on this port are overload protected
Data represents standard operation at 25C with 5V supply unless otherwise noted. Specifications are subject to change without notification. Intel and Atom are trademarks of Intel Corporation. PC/104 is a trademark of the PC/104 Consortium. SUMIT is a trademark of the SFF-SIG.