HC210 datasheet(145/228 Pages) ALTERA

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Altera Corporation

6–17

September 2008

Making Global Assignments

Making I/O

Assignments

Because of the complex rules governing the use of programmable I/O

cells and their availability for specific pins and packages, Altera highly

recommends that I/O assignments are completed using the Pin Planning

tool and the Assignment Editor in the Quartus II GUI. These tools ensure

that all of the rules regarding each pin and I/O cell are applied correctly.

The Quartus II GUI can export a Tcl script containing all I/O assignments

and specifications. I/O assignments are described here for information

only.

For more information on I/O location and type assignments using the

Quartus II Assignment Editor and Pin Planner tools, refer to the

Assignment Editor chapter in volume 2 of the Quartus II Handbook.

In this section, I/O specification is considered in two parts:

■

Pin assignments

■

I/O type assignments

Pin Assignments

Design I/O signals are assigned to package balls using the

set_location_assignment

command. The syntax for this command is

given below:

tcl> set_location_assignment [-comment <comment>] \

[-disable] [-remove] -to <destination> <value>

Here, <destination> is the package ball name and <value> is the design I/O

signal name. For BGA and FBGA packages, the ball name follows the

form

PIN_<coordinate>. For example, to assign design I/O signal

data_out[15] to package ball AL17:

tcl> set_location_assignment -to PIN_AL17 data_out[15]

Setting I/O Type and Parameters

For I/O type and parameter specification, the set_instance_assignment

command is used. The syntax for this command is:

tcl> set_instance_assignment [-comment <comment>] \

[-disable] [-entity <entity_name>] \

[-from <source>] -name <name> [-remove] \

[-section_id <section_id>] \

[-to <destination>] <value>

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