188.8.131.52. Estimating ROM Usage
The .jbc size can be separated into these categories:
- The amount of memory required to store the programming data.
- The space required for the programming algorithm.
This equation provides a .jbc size estimate that may vary by ±10%, depending on device utilization. If device utilization is low, .jbc sizes tend to be smaller because the compression algorithm used to minimize file size will more likely find repetitive data.
This equation also indicates that the algorithm size stays constant for a device family but the programming data size grows slightly as more devices are targeted. For a given device family, the increase in the .jbc size caused by the data component is linear.
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