EPCS选型时,看官方数据手册Serial Configuration Devices (EPCS1,EPCS4, EPCS16, EPCS64, and EPCS128)Data Sheet,有实例,很好,想照着做
Example 3–1. Compression Ratio Calculation
EP4SGX530 = 189,000,000 bits
EPCS128 = 134,217,728 bits
Preliminary data indicates that compression typically reduces the configuration
bitstream size by 35% to 55%. We take the worst case that is 35% compression.
189,000,000 bits × 0.65 = 122,850,000 bits
It fits EPCS128 device.
结果再打开Stratix IV Device Handbook,怎么也找不到189,000,000 bits
这个数是怎么得到的?是不是通过某种方式计算得到的? |