Microsemi IGLOO2 - Page 91

Board Design and Layout Checklist
AC393 Application Note Revision 14.0 83
12. Vertical Migration
If desiring pin compatibility within the same package, choose the largest density
device for easy vertical migration without any pin conflict in case of future
development.
For more information, refer to the application notes available under
Schematics/PCB section.
13. Identify the clocking requirements.
14. Verify that the number of differential channels is adequate.
Design
15. Power Analysis
Perform power analysis and check the results against the power budget.
(Microsemi Power Calculator can be used to analyze the power consumption.
Estimate the dynamic and static power consumption, and ensure that the
design does not violate the power budget.)
16. Noise Margin Analysis
Analyze the dynamic drive capability of output drivers to ensure that the drivers
are not loaded beyond the limits (V
OH
, V
OL
, V
IH
, and V
IL
).
Loading Analysis
Analyze the dynamic drive capability of output drivers to confirm that the drivers
are not loaded beyond the limits (C
L
)
17. Programming and Debugging Scheme
Check for the programming modes and the procedure to program the device.
For programming or debugging through JTAG, add a 10-pin vertical header
(2.54 mm pitch). For more information about programming, see IGLOO2
Programming User Guide and SmartFusion2 Programming User Guide.
Power Supply
18. Reference Documentation
– IGLOO2 and SmartFusion2 Datasheet, Operating Conditions section
– IGLOO2 Pin Descriptions / SmartFusion2 Pin Descriptions
– Figure 1, page 5 (for more detailed connectivity)
19. Voltage Rails
The design can be created with just two voltage rails. See Obtaining a Two-Rail
Design for Non-SerDes Applications, page 35.
20. VDD: Core Supply
VDD operates at 1.2 V.
21. VPP: Programming Supply
Charge pump and eNVM can operate at 2.5 V or 3.3 V.
22. VDDI Bank Supplies
Connect VDDI pins to support the I/O standards of each bank.
Ensure I/O power pin compatibility with I/O standards.
Check for the banks that must be powered even when unused. For
recommendations on unused bank supplies, see Table 18, page 34.
The recommendations vary from device to device.
Table 23 • Design Checklist (continued)
S.No. Checklist Yes/No