PC/104 – USB I/O

Advanced Digital Logic, Inc.; 4411 Morena Blvd., Suite 101; San Diego, CA 92117-4345

USB-DIO-32 - Buffered Digital I/O, Three Counter/Timers

FEATURES

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High-speed USB 2.0 device, USB 1.1 compatible

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Small, portable 32-channel digital I/O module

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Four 8-bit ports independently selectable for inputs or outputs

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All 32 I/O lines buffered with Sink 64mA / Source 32mA current capabilities

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Removable screw terminal adaptor for easy wiring

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Standard 50-pin IDC connector with key

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Custom high-speed function driver

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PC/104 module size and mounting compatibility

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Small (4" x 4" x 1.25") rugged industrial enclosure

FACTORY OPTIONS

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Three 82C54 counter/timers

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External power for high current capabilities

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DIN rail mounting provision

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Economy "E" version also available without the screw terminal board

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OEM (board only) version with PC/104 mounting holes and PCB footprint for

added flexibility in embedded applications

FUNCTIONAL DESCRIPTION

The USB-DIO-32 is an ideal solution for adding portable, easy-to-install digital I/O and counter capabilities to any computer with a USB port. The USB-DIO-32

is a USB 2.0 high-speed device, offering the highest speed available with the USB bus. It is fully compatible with both USB 1.1 and USB 2.0 ports. The unit is

plug-and-play allowing quick connect or disconnect whenever you need additional I/O on your USB port.

The USB-DIO-32 features 32 bits of TTL-compatible digital I/O with high-current capabilities and three optional 82C54 counters. Each digital port can be pro-

grammed to accept inputs or to drive outputs on four 8-bit ports, designated as port A, B, C, and D. Power is supplied to the board via the USB cable or for

higher current capabilities, external power may be used. The I/O wiring connections for USB-DIO-32 are via an industry standard 50-pin connector. For exter-

nal circuits, fused +5VDC power is available at the connector. This resettable fuse is rated at 0.5A.

All I/O lines are buffered by a type 74ABT245 tri-state buffer transceiver capable of sinking 64 mA or sourcing 32 mA. The buffers are configured under pro-

gram control for input or output. Jumper selectable pull-ups (to +5 VDC) or pull-downs (to ground) on the board allow for contact monitoring and assure that

there are no erroneous outputs at power-up until the board is initialized by system software.

The USB-DIO-32 is designed to be used in rugged industrial environments but is small enough to fit nicely onto any desk or testing station. The board is

PC/104 sized (3.550 by 3.775 inches) and ships inside a steel powder-coated enclosure with an anti-skid bottom.

COUNTER/TIMERS

Three 82C54 chips each include three 16-bit counter/timers factory configured in an optimal module for use as event counters, frequency output, pulse width,

and frequency measurement (see the Block Diagram).

OEM USB/104 FORM FACTOR

The OEM (board only) version is perfect for a variety of embedded applications. What makes the OEM option unique is that its PCB size and mounting holes

match the PC/104 form factor (without the bus connections). This allows our rugged digital board to be added to any PCI-104 or PC/104 stack by connecting it

to a simple USB port usually included on-board with embedded CPU form factors such as EBX, EPIC, and PC/104. This is especially important since many

newer CPU chipsets do not support ISA and have plenty of USB ports. The USB-DIO-32 OEM board can also be installed using standoffs inside other enclo-

sures or systems.

ACCESSORIES

The USB-DIO-32 is available with optional cable assemblies and screw terminal board. The pin connections are also compatible with industry standard I/O

racks such as ACCES A24A, OPTO22, Gordos, Potter & Brumfield, etc. with optional cable.

SOFTWARE

The USB-DIO-32 is plug-and-play which allows quick connect or disconnect whenever you need additional I/O on your USB port. The module utilizes a high-

speed custom function driver optimized for a maximum data throughput that is 50-100 times faster than the USB human interface device (HID) driver used by

many competing products. This approach maximizes the full functionality of the hardware along with capitalizing the advantage of high-speed USB 2.0. The

USB-DIO-32 is supported for use in most USB supported operating systems and includes a free Linux and Windows 98se/Me/2000/XP/2003 compatible soft-

ware package. This package contains sample programs and source code in Visual Basic, Delphi, C++ Builder, and Visual C++ for Windows. Also incorporated

is a graphical setup program in Windows. Third party support includes a Windows standard DLL interface usable from the most popular application programs.

Embedded OS support include Windows XPe.