Fusion Device Family Overview
1-8 Revision 4
standards. In the family’s larger devices, the north bank is divided into two banks of digital Pro I/Os,
supporting a wide variety of single-ended, differential, and voltage-referenced I/O standards.
Each I/O module contains several input, output, and enable registers. These registers allow the
implementation of the following applications:
• Single-Data-Rate (SDR) applications
• Double-Data-Rate (DDR) applications—DDR LVDS I/O for chip-to-chip communications
• Fusion banks support LVPECL, LVDS, BLVDS, and M-LVDS with 20 multi-drop points.
VersaTiles
The Fusion core consists of VersaTiles, which are also used in the successful ProASIC3 family. The
Fusion VersaTile supports the following:
• All 3-input logic functions—LUT-3 equivalent
• Latch with clear or set
• D-flip-flop with clear or set and optional enable
Refer to Figure 1-2 for the VersaTile configuration arrangement.
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.
The I/Os are controlled by the JTAG Boundary Scan register during programming, except for the analog
pins (AC, AT and AV). The Boundary Scan register of the AG pin can be used to enable/disable the gate
driver in software v9.0.
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.
4. Sort the pins as desired by clicking any of the column headers to sort the entries by that header.
Select the I/Os you wish to modify (Figure 1-3 on page 1-9).
5. Set the I/O Output State. You can set Basic I/O settings if you want to use the default I/O settings
for your pins, or use Custom I/O settings to customize the settings for each pin. Basic I/O state
settings:
1 – I/O is set to drive out logic High
0 – I/O is set to drive out logic Low
Last Known State – I/O is set to the last value that was driven out prior to entering the
programming mode, and then held at that value during programming
Z -Tri-State: I/O is tristated
Figure 1-2 • VersaTile Configurations
X1
Y
X2
X3
LUT-3
Data Y
CLK
Enable
CLR
D-FFE
Data Y
CLK
CLR
D-FF
LUT-3 Equivalent D-Flip-Flop with Clear or Set Enable D-Flip-Flop with Clear or Set
