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发表于 2015-1-5 11:57:23
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1. 读取可以是任意地址。
2. 擦除必须是整块。比如W25Q64，最小的擦除块是4K字节。
3. 写入是整个扇区。比如W25Q64，最小的写入扇区是256个字节。
这个基本信息还是要多读读datasheet比较快。 datasheet的第一节有如下描述。
The W25Q64FV array is organized into 32,768 programmable pages of 256-bytes each. Up to 256 bytes can be programmed at a time. Pages can be erased in groups of 16 (4KB sector erase), groups of 128 (32KB block erase), groups of 256 (64KB block erase) or the entire chip (chip erase). The W25Q64FV has 2,048 erasable sectors and 128 erasable blocks respectively. The small 4KB sectors allow for greater flexibility in applications that require data and parameter storage. (See figure 2.) |
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发表于 2015-1-5 11:13:52
楼主
发表于 2015-1-5 11:52:29
