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ProASIC3 Flash Family FPGAs

I/Os with Advanced I/O Standards

The ProASIC3 family of FPGAs features a flexible I/O structure, supporting a range of voltages (1.5 V,

1.8 V, 2.5 V, and 3.3 V). ProASIC3 FPGAs support many different I/O standards—single-ended and

differential.

The I/Os are organized into banks, with two or four banks per device. The configuration of these banks

determines the I/O standards supported (Table 1-1).

Table 1-1 • I/O Standards Supported

I/O Standards Supported

I/O Bank Type

Device and Bank Location

LVTTL/

LVPECL, LVDS,

LVCMOS PCI/PCI-X B-LVDS, M-LVDS

Advanced

East and west Banks of A3P250 and







larger devices

Standard Plus North and south banks of A3P250 and



larger devices

All banks of A3P060 and A3P125



Not supported

Standard

All banks of A3P015 and A3P030



Not

Not supported

supported

Each I/O module contains several input, output, and enable registers. These registers allow the

implementation of the following:

• Single-Data-Rate applications

• Double-Data-Rate applications—DDR LVDS, B-LVDS, and M-LVDS I/Os for point-to-point

communications

ProASIC3 banks for the A3P250 device and above support LVPECL, LVDS, B-LVDS and M-LVDS.

B-LVDS and M-LVDS can support up to 20 loads.

Hot-swap (also called hot-plug, or hot-insertion) is the operation of hot-insertion or hot-removal of a card

in a powered-up system.

Cold-sparing (also called cold-swap) refers to the ability of a device to leave system data undisturbed

when the system is powered up, while the component itself is powered down, or when power supplies

are floating.

Wide Range I/O Support

ProASIC3 devices support JEDEC-defined wide range I/O operation. ProASIC3 supports the JESD8-B

specification, covering both 3 V and 3.3 V supplies, for an effective operating range of 2.7 V to 3.6 V.

Wider I/O range means designers can eliminate power supplies or power conditioning components from

the board or move to less costly components with greater tolerances. Wide range eases I/O bank

management and provides enhanced protection from system voltage spikes, while providing the flexibility

to easily run custom voltage applications.

Specifying I/O States During Programming

You can modify the I/O states during programming in FlashPro. In FlashPro, this feature is supported for

PDB files generated from Designer v8.5 or greater. See the FlashPro User’s Guide for more information.

Note: PDB files generated from Designer v8.1 to Designer v8.4 (including all service packs) have

limited display of Pin Numbers only.

1. Load a PDB from the FlashPro GUI. You must have a PDB loaded to modify the I/O states during

programming.

2. From the FlashPro GUI, click PDB Configuration. A FlashPoint – Programming File Generator

window appears.

3. Click the Specify I/O States During Programming button to display the Specify I/O States During

Programming dialog box.

Revision 13

1-7

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