有个问题还需要请教一下啊，芯片手册里写着Refresh count是4k，Row addressing是2K，Refresh period(4096 rows)最大时间是64ms.
看C6747里的话，我的连接方法，寻址空间是32MB（上图标黄的那条），但是我的SDRAM实际范围是8MB，那我要计算Refresh Rate的话应该如何计算？
- The value of this field may be calculated using the following equation:
- REFRESH_RATE = SDRAM clock frequency × SDRAM refresh rate
- Assuming 64 ms (tREF), 8192 rows (213; 13 address lines), SDRAM refresh rate = 64/8192 = 7.8 μs.
- Therefore, the following results assuming 133-MHz SDRAM clock frequency.
- REFRESH_RATE = 133 MHz × 7.8 μs = 1037.4 Therefore, REFRESH_RATE = 1038 = 40Eh
还是说因为我的SDRAM只有2K行地址，刷新4K需要64ms,CPU实际上会自动刷新8K行地址的？我的实际刷新率应当至少是1562/2？
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