HC1S25 Datasheet, PDF (81/110 Pages) Altera Corporation – HardCopy Stratix Device Family

Checking Designs for HardCopy Design Guidelines
LogicLock Region Definition in the Migrated HardCopy Stratix
Quartus II Settings File
set_global_assignment -name LL_HEIGHT 15 -entity risc8 -section_id test
set_global_assignment -name LL_WIDTH 15 -entity risc8 -section_id test
set_global_assignment -name LL_STATE FLOATING -entity risc8 -section_id test
set_global_assignment -name LL_AUTO_SIZE ON -entity risc8 -section_id test
Checking
Designs for
HardCopy
Design
Guidelines
f
When you develop a design with HardCopy migration in mind, you must
follow Altera-recommended design practices that ensure a
straightforward migration process or the design will not be able to be
implemented in a HardCopy device. Prior to starting migration of the
design to a HardCopy device, you must review the design and identify
and address all the design issues. Any design issues that have not been
addressed can jeopardize silicon success.
Altera Recommended HDL Coding Guidelines
Designing for Altera PLD, FPGA, and HardCopy structured ASIC
devices requires certain specific design guidelines and hardware
description language (HDL) coding style recommendations be followed.
For more information about design recommendations and HDL coding
styles, refer to the Design Guidelines section in volume 1 of the Quartus II
Handbook.
Design Assistant
The Quartus II software includes the Design Assistant feature to check
your design against the HardCopy design guidelines. Some of the design
rule checks performed by the Design Assistant include the following
rules:
■ Design should not contain combinational loops
■ Design should not contain delay chains
■ Design should not contain latches
To use the Design Assistant, you must run Analysis and Synthesis on the
design in the Quartus II software. Altera recommends that you run the
Design Assistant to check for compliance with the HardCopy design
guidelines early in the design process and after every compilation.
Altera Corporation
September 2008
5–19
Preliminary