Adaptec AVA-1505A Guía de usuario descargar pdf (Pagina 25)

FAQ’s for Actel’s Antifuse FPGA Programming 25

65. Can I use 1020A files to program a 1020B device?

Ans. Yes, the 1020B is compatible to the 1020A, but the timing will be different because the 1020B

device technology is faster. Actel strongly recommends that you rerun all timing analyses after making the

compatible die change.

66. How do I check which version of Designer was used to create my *.afm

file?

Ans. Open the *.afm file in a text editor. The header states the Designer release number that was used.

The following example is an excerpt from a *.afm file:

| PROGRAM Designer Series (tm) Development System

| VERSION R2-2001 Post-Prod 4.3.4.7

67. What is the silicon signature?

Ans. A silicon signature is a 1-5 digit hexadecimal number that can optionally be programmed into an

Actel device. The silicon signature must be assigned by you during the Fuse Generation function in

Designer. This feature is provided so you can program an individual identification code into your devices.

After programming, the silicon signature can be read from the device by executing Dev_Status from the

Special Operation tab.

Figure 4: The Silicon Signature

68. What is PINCHECKSUM in the *.afm file?

Ans. The PINCHECKSUM variable in the *.afm file is the package-pin checksum. This checksum always

has the following two values:

; VAR PINCHECKSUM 5e7dbf37_c9cf9fee

The first value (5e7dbf37) represents the package type used (for example, 84PLCC vs. 84CQFP). The

second value refers to the mapping between design I/Os and their pin assignments.

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Adaptec AVA-1505A Guía de usuario Pagina 25