| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 0 | 0 | WD1 | WD0 | BL1 | BL0 | WEL | WIP |
| WD1 | WD0 | 看门狗定时值 |
| 0 | 0 | 1.4s |
| 0 | 1 | 600ms |
| 1 | 0 | 200ms |
| 1 | 1 | 禁止看门狗工作 |
| BL1 | BL0 | 写保护的单元地址 |
| 0 | 0 | 没有保护 |
| 0 | 1 | 180H~1FFH |
| 1 | 0 | 100H~1FFH |
| 1 | 1 | 000H~1FFH |
| 命令名称 | 命令格式 | 内 容 |
| WREN | 0000 0110 | 打开写使能开关 |
| WRDI | 0000 0100 | 关闭写使能开关 |
| RDSR | 0000 0101 | 读状态寄存器 |
| WRSR | 0000 0001 | 写状态寄存器 |
| READ | 0000 A8011 | 读存储单元 |
| WRITE | 0000 A8010 | 写存储单元 |
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