{"id":20966,"date":"2024-12-23T10:54:07","date_gmt":"2024-12-23T02:54:07","guid":{"rendered":"https:\/\/www.simcentric.com\/uncategorized-sc\/nand-flash-technology-in-ssds-for-hong-kong-server-storage\/"},"modified":"2024-12-23T10:57:04","modified_gmt":"2024-12-23T02:57:04","slug":"nand-flash-technology-in-ssds-for-hong-kong-server-storage","status":"publish","type":"post","link":"https:\/\/www.simcentric.com\/sc\/hong-kong-dedicated-server-sc\/nand-flash-technology-in-ssds-for-hong-kong-server-storage\/","title":{"rendered":"\u4e86\u89e3\u9999\u6e2f\u670d\u52a1\u5668SSD\u4e2d\u7684NAND Flash\u6280\u672f"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=””]<\/p>\n

\u9999\u6e2f\u6570\u636e\u4e2d\u5fc3\u670d\u52a1\u5668SSD\u7684\u6f14\u8fdb<\/strong><\/h2>\n

\u5728\u9999\u6e2f\u5feb\u901f\u6269\u5f20\u7684\u6570\u636e\u4e2d\u5fc3\u9886\u57df\uff0cNAND Flash\u6280\u672f\u5f7b\u5e95\u6539\u53d8\u4e86\u670d\u52a1\u5668\u5b58\u50a8\u89e3\u51b3\u65b9\u6848<\/a>\u3002\u4ece\u4f20\u7edfHDD\u5411SSD\u7684\u8f6c\u53d8\u5728\u670d\u52a1\u5668\u79df\u7528<\/a>\u73af\u5883\u4e2d\u9700\u8981\u66f4\u6df1\u5165\u5730\u7406\u89e3NAND Flash\u67b6\u6784\u3002\u5bf9\u4e8e\u7ba1\u7406\u670d\u52a1\u5668\u6258\u7ba1\u8bbe\u65bd\u7684IT\u4e13\u4e1a\u4eba\u5458\u6765\u8bf4\uff0c\u638c\u63e1\u8fd9\u4e9b\u6982\u5ff5\u5bf9\u4e8e\u4f18\u5316SSD\u6027\u80fd\u548c\u53ef\u9760\u6027\u81f3\u5173\u91cd\u8981\u3002\u57fa\u4e8eNAND Flash\u7684SSD\u7684\u6574\u5408\u5df2\u6210\u4e3a\u5b9e\u73b0\u73b0\u4ee3\u4e91\u670d\u52a1\u548c\u4f01\u4e1a\u5e94\u7528\u9ad8\u6027\u80fd\u8981\u6c42\u7684\u57fa\u77f3\u3002<\/p>\n

NAND Flash\u57fa\u7840\uff1a\u6df1\u5165\u89e3\u6790<\/strong><\/h2>\n

NAND Flash\u91c7\u7528\u77e9\u9635\u914d\u7f6e\u7684\u6d6e\u6805\u6676\u4f53\u7ba1\u3002\u4e0e\u6613\u5931\u6027\u5b58\u50a8\u5668\u4e0d\u540c\uff0c\u8fd9\u4e9b\u6676\u4f53\u7ba1\u901a\u8fc7\u88ab\u56f0\u7535\u5b50\u5728\u65ad\u7535\u540e\u4ecd\u80fd\u4fdd\u6301\u5176\u72b6\u6001\u3002\u5176\u57fa\u672c\u64cd\u4f5c\u6d89\u53ca\u64cd\u7eb5\u6d6e\u6805\u5185\u7684\u7535\u5b50\u72b6\u6001\uff0c\u5b9e\u73b0\u6301\u4e45\u6570\u636eSSD\u3002\u8fd9\u79cd\u67b6\u6784\u5728\u4fdd\u6301\u5408\u7406\u7684\u8bbf\u95ee\u901f\u5ea6\u548c\u80fd\u6e90\u6548\u7387\u7684\u540c\u65f6\uff0c\u53ef\u5b9e\u73b0\u9ad8\u5bc6\u5ea6SSD\u3002<\/p>\n

\r\n\/\/ NAND Flash\u5355\u5143\u72b6\u6001\u7684\u7b80\u5316\u8868\u793a\r\nclass NANDCell {\r\n    private:\r\n        enum State {\r\n            ERASED = 1,    \/\/ \u51681\uff08\u901a\u5e38\u7ea63V\uff09\r\n            PROGRAMMED = 0 \/\/ \u9009\u5b9a\u76840\uff08\u901a\u5e38\u7ea60.5V\uff09\r\n        };\r\n        \r\n    public:\r\n        void Program() {\r\n            \/\/ \u5411\u63a7\u5236\u6805\u6781\u65bd\u52a0\u7ea620V\r\n            \/\/ \u7535\u5b50\u96a7\u7a7f\u8fdb\u5165\u6d6e\u6805\r\n            state = PROGRAMMED;\r\n        }\r\n        \r\n        void Erase() {\r\n            \/\/ \u5411\u886c\u5e95\u65bd\u52a0\u7ea620V\r\n            \/\/ \u7535\u5b50\u4ece\u6d6e\u6805\u4e2d\u96a7\u7a7f\u51fa\u53bb\r\n            state = ERASED;\r\n        }\r\n        \r\n        bool ReadState() {\r\n            \/\/ \u65bd\u52a0\u53c2\u8003\u7535\u538b\r\n            return (state == ERASED);\r\n        }\r\n};\r\n<\/code><\/pre>\n
\u67b6\u6784\u6df1\u5165\uff1aSSD\u9635\u5217\u7ec4\u7ec7<\/strong><\/h2>\n
NAND Flash\u67b6\u6784\u5305\u62ec\u5757\u3001\u9875\u548c\u5355\u5143\u3002\u4f01\u4e1a\u7ea7SSD\u901a\u5e38\u5b9e\u65bd\u590d\u6742\u7684\u635f\u8017\u5e73\u8861\u7b97\u6cd5\u6765\u5747\u5300\u5206\u914d\u5199\u5165\u64cd\u4f5c\u3002NAND Flash SSD\u7684\u5c42\u6b21\u7ed3\u6784\u6d89\u53ca\u591a\u4e2a\u7ec4\u7ec7\u5c42\u7ea7\uff0c\u6bcf\u4e2a\u5c42\u7ea7\u5728\u6570\u636e\u7ba1\u7406\u548c\u6027\u80fd\u4f18\u5316\u4e2d\u90fd\u6709\u7279\u5b9a\u7528\u9014\u3002\u7406\u89e3\u8fd9\u79cd\u67b6\u6784\u5bf9\u5f00\u53d1\u9ad8\u6548SSD\u7b56\u7565\u81f3\u5173\u91cd\u8981\u3002<\/p>\n
\r\nstruct NANDStructure {\r\n    const int PAGES_PER_BLOCK = 256;      \/\/ \u6bcf\u5757\u9875\u6570\r\n    const int BLOCKS_PER_PLANE = 1024;    \/\/ \u6bcf\u5e73\u9762\u5757\u6570\r\n    const int PLANES_PER_DIE = 4;         \/\/ \u6bcf\u88f8\u7247\u5e73\u9762\u6570\r\n    const int DIES_PER_PACKAGE = 8;       \/\/ \u6bcf\u5c01\u88c5\u88f8\u7247\u6570\r\n    \r\n    typedef struct {\r\n        uint8_t data[4096];      \/\/ \u4e3b\u6570\u636e\u533a\r\n        uint8_t spare[224];      \/\/ \u5143\u6570\u636e\/ECC\r\n        uint32_t page_number;    \/\/ \u903b\u8f91\u9875\u5730\u5740\r\n        bool is_valid;           \/\/ \u9875\u6709\u6548\u6807\u5fd7\r\n    } Page;\r\n    \r\n    typedef struct {\r\n        Page pages[PAGES_PER_BLOCK];\r\n        uint32_t erase_count;    \/\/ \u5757\u635f\u8017\u76d1\u63a7\r\n        bool is_bad;             \/\/ \u574f\u5757\u6307\u793a\u5668\r\n    } Block;\r\n    \r\n    typedef struct {\r\n        Block blocks[BLOCKS_PER_PLANE];\r\n        uint32_t active_blocks;  \/\/ \u5f53\u524d\u4f7f\u7528\u7684\u5757\u6570\r\n    } Plane;\r\n};\r\n<\/code><\/pre>\n
\u9ad8\u7ea7\u9519\u8bef\u68c0\u6d4b\u548c\u7ea0\u6b63<\/strong><\/h2>\n
\u73b0\u4ee3NAND Flash\u5b9e\u73b0\u91c7\u7528\u590d\u6742\u7684\u9519\u8bef\u7ea0\u6b63\u7801(ECC)\u673a\u5236\u6765\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3002\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528BCH\u6216LDPC\u7801\uff0c\u80fd\u591f\u7ea0\u6b63\u591a\u4e2a\u4f4d\u9519\u8bef\u3002\u968f\u7740SSD\u5bc6\u5ea6\u7684\u589e\u52a0\uff0c\u8fd9\u4e9b\u9519\u8bef\u7ea0\u6b63\u529f\u80fd\u53d8\u5f97\u8d8a\u6765\u8d8a\u91cd\u8981\uff1a<\/p>\n
\r\nclass ErrorCorrection {\r\n    private:\r\n        const int MAX_ERRORS_CORRECTABLE = 72; \/\/ \u6bcf1KB\u4f4d\u6570\r\n        \r\n    public:\r\n        bool implement_LDPC() {\r\n            \/\/ \u4f4e\u5bc6\u5ea6\u5947\u5076\u6821\u9a8c\u5b9e\u73b0\r\n            calculate_syndrome();\r\n            perform_belief_propagation();\r\n            return verify_correction();\r\n        }\r\n        \r\n        void calculate_error_metrics() {\r\n            \/\/ \u76d1\u63a7\u9519\u8bef\u7387\u548c\u6a21\u5f0f\r\n            track_uncorrectable_errors();\r\n            adjust_read_voltage_thresholds();\r\n        }\r\n};\r\n<\/code><\/pre>\n
SLC vs MLC vs TLC\uff1a\u6027\u80fd\u6743\u8861<\/strong><\/h2>\n
\u6bcf\u79cdNAND Flash\u7c7b\u578b\u4e3a\u4e0d\u540c\u7684\u670d\u52a1\u5668\u79df\u7528\u573a\u666f\u63d0\u4f9b\u72ec\u7279\u4f18\u52bf\uff1a<\/p>\n
– SLC (\u5355\u5c42\u5355\u5143):<\/p>\n
\u2022 \u6bcf\u4e2a\u5355\u51431\u4f4d<\/p>\n
\u2022 \u7ea610\u4e07\u6b21P\/E\u5faa\u73af<\/p>\n
\u2022 \u6700\u5feb\u7684\u8bfb\u5199\u901f\u5ea6<\/p>\n
\u2022 \u6bcfGB\u6210\u672c\u6700\u9ad8<\/p>\n
\u2022 \u9002\u5408\u5199\u5165\u5bc6\u96c6\u578b\u4f01\u4e1a\u5e94\u7528<\/p>\n
– MLC (\u591a\u5c42\u5355\u5143):<\/p>\n
\u2022 \u6bcf\u4e2a\u5355\u51432\u4f4d<\/p>\n
\u2022 \u7ea63\u5343\u6b21P\/E\u5faa\u73af<\/p>\n
\u2022 \u6027\u80fd\u548c\u6210\u672c\u7684\u826f\u597d\u5e73\u8861<\/p>\n
\u2022 \u9002\u5408\u6df7\u5408\u4f7f\u7528\u573a\u666f<\/p>\n
– TLC (\u4e09\u5c42\u5355\u5143):<\/p>\n
\u2022 \u6bcf\u4e2a\u5355\u51433\u4f4d<\/p>\n
\u2022 \u7ea61\u5343\u6b21P\/E\u5faa\u73af<\/p>\n
\u2022 \u66f4\u9ad8\u5bc6\u5ea6\uff0c\u66f4\u4f4e\u6210\u672c<\/p>\n
\u2022 \u6700\u9002\u5408\u8bfb\u53d6\u5bc6\u96c6\u578b\u5de5\u4f5c\u8d1f\u8f7d<\/p>\n
– QLC (\u56db\u5c42\u5355\u5143):<\/p>\n
\u2022 \u6bcf\u4e2a\u5355\u51434\u4f4d<\/p>\n
\u2022 \u7ea6500\u6b21P\/E\u5faa\u73af<\/p>\n
\u2022 \u6700\u9ad8\u5bc6\u5ea6\uff0c\u6700\u4f4e\u6210\u672c<\/p>\n
\u2022 \u6700\u9002\u5408\u5f52\u6863SSD<\/p>\n
\u4f01\u4e1a\u7ea7\u4f18\u5316\u6280\u672f<\/strong><\/h2>\n
\u73b0\u4ee3\u4f01\u4e1a\u7ea7SSD\u91c7\u7528\u5e26\u6709\u5b9a\u5236\u56fa\u4ef6\u7684\u590d\u6742\u63a7\u5236\u5668\u6765\u6700\u5927\u5316\u6027\u80fd\u548c\u5bff\u547d\u3002\u8fd9\u4e9b\u63a7\u5236\u5668\u5b9e\u73b0\u5404\u79cd\u4f18\u5316\u7b56\u7565\u4ee5\u786e\u4fdd\u7a33\u5b9a\u6027\u80fd\u5e76\u5ef6\u957fSSD\u5bff\u547d\uff1a<\/p>\n
\r\nclass EnterpriseController {\r\n    private:\r\n        struct WriteAmplificationMetrics {\r\n            float user_writes;\r\n            float actual_writes;\r\n            float wa_factor;\r\n        };\r\n        \r\n        void implement_wear_leveling() {\r\n            \/\/ \u52a8\u6001\u635f\u8017\u5e73\u8861\u7b97\u6cd5\r\n            monitor_block_erase_counts();\r\n            redistribute_hot_data();\r\n            balance_write_operations();\r\n        }\r\n        \r\n        void manage_over_provisioning() {\r\n            \/\/ \u4f01\u4e1a\u7ea7SSD\u901a\u5e38\u4e3a28%\r\n            reserve_blocks = total_blocks * 0.28;\r\n            maintain_write_performance();\r\n            handle_garbage_collection();\r\n        }\r\n        \r\n        void optimize_garbage_collection() {\r\n            \/\/ \u540e\u53f0\u64cd\u4f5c\r\n            identify_invalid_pages();\r\n            consolidate_valid_data();\r\n            schedule_block_erasure();\r\n        }\r\n};\r\n<\/code><\/pre>\n
\u9999\u6e2f\u6570\u636e\u4e2d\u5fc3\u5b9e\u65bd\u6307\u5357<\/strong><\/h2>\n
\u5728\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u90e8\u7f72NAND Flash SSD\u65f6\uff0c\u9700\u8981\u8003\u8651\u4ee5\u4e0b\u5173\u952e\u56e0\u7d20\uff1a<\/p>\n
1. \u5de5\u4f5c\u8d1f\u8f7d\u7279\u5f81\uff1a<\/p>\n
– \u8bfb\/\u5199\u6bd4\u7387\u5206\u6790<\/p>\n
– I\/O\u6a21\u5f0f\u5206\u6790<\/p>\n
– \u961f\u5217\u6df1\u5ea6\u8981\u6c42<\/p>\n
– \u5757\u5927\u5c0f\u5206\u5e03<\/p>\n
2. \u73af\u5883\u8003\u8651\uff1a<\/p>\n
– \u8fd0\u884c\u6e29\u5ea6\u8303\u56f4<\/p>\n
– \u6e7f\u5ea6\u63a7\u5236<\/p>\n
– \u7535\u6e90\u7a33\u5b9a\u6027<\/p>\n
– \u6563\u70ed\u6548\u7387<\/p>\n
3. \u53ef\u9760\u6027\u8981\u6c42\uff1a<\/p>\n
– \u65ad\u7535\u4fdd\u62a4<\/p>\n
– \u6570\u636e\u5197\u4f59<\/p>\n
– \u5907\u4efd\u7b56\u7565<\/p>\n
– \u5e73\u5747\u6545\u969c\u95f4\u9694\u65f6\u95f4(MTBF)<\/p>\n
4. \u6027\u80fd\u6307\u6807\uff1a<\/p>\n
– IOPS\u8981\u6c42<\/p>\n
– \u5ef6\u8fdf\u671f\u671b<\/p>\n
– \u5e26\u5bbd\u9700\u6c42<\/p>\n
– \u670d\u52a1\u8d28\u91cf(QoS)<\/p>\n
\u672a\u6765\u53d1\u5c55\u4e0e\u65b0\u5174\u6280\u672f<\/strong><\/h2>\n
NAND Flash\u6280\u672f\u7684\u53d1\u5c55\u524d\u666f\u663e\u793a\u51fa\u4ee4\u4eba\u671f\u5f85\u7684\u8fdb\u5c55\uff1a<\/p>\n
– 200+\u5c423D NAND<\/p>\n
– \u7535\u8377\u9677\u9631Flash(CTF)\u5b9e\u73b0<\/p>\n
– \u591a\u5c42\u5355\u5143\u521b\u65b0<\/p>\n
– \u533a\u57df\u547d\u540d\u7a7a\u95f4\u63d0\u5347\u6548\u7387<\/p>\n
– PLC(\u4e94\u5c42\u5355\u5143)\u7814\u7a76<\/p>\n
– \u5148\u8fdb\u63a7\u5236\u5668\u67b6\u6784<\/p>\n
– \u8ba1\u7b97SSD\u96c6\u6210<\/p>\n
– AI\u9a71\u52a8\u7684\u635f\u8017\u5e73\u8861<\/p>\n
\u5b9e\u9645\u90e8\u7f72\u8003\u8651\u4e8b\u9879<\/strong><\/h2>\n
\u5bf9\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\u6258\u7ba1\u63d0\u4f9b\u5546\uff0c\u90e8\u7f72\u4f01\u4e1a\u7ea7SSD\u9700\u8981\u4ed4\u7ec6\u89c4\u5212\u5e76\u8003\u8651\u5404\u79cd\u5de5\u4f5c\u8d1f\u8f7d\u6a21\u5f0f\uff1a<\/p>\n
\r\nfunction calculate_storage_requirements(workload_type) {\r\n    \/\/ DWPD = \u6bcf\u65e5\u5199\u5165\u8010\u4e45\u5ea6\r\n    const enterprise_workload = {\r\n        \"OLTP\": {\r\n            min_DWPD: 3,\r\n            recommended_type: \"SLC\/eMLC\",\r\n            over_provisioning: \"40%\",\r\n            endurance_target: \"5\u5e74\"\r\n        },\r\n        \"Mixed\": {\r\n            min_DWPD: 1,\r\n            recommended_type: \"TLC\",\r\n            over_provisioning: \"28%\",\r\n            endurance_target: \"3\u5e74\"\r\n        },\r\n        \"Read-Heavy\": {\r\n            min_DWPD: 0.3,\r\n            recommended_type: \"QLC\",\r\n            over_provisioning: \"15%\",\r\n            endurance_target: \"2\u5e74\"\r\n        }\r\n    };\r\n    \r\n    return enterprise_workload[workload_type];\r\n}\r\n<\/code><\/pre>\n
\u7ed3\u8bba\uff1a\u4f18\u5316\u9999\u6e2f\u5e02\u573a<\/strong><\/h2>\n
\u6df1\u5165\u7406\u89e3NAND Flash\u6280\u672f\u5bf9\u4e8e\u5728\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u4f18\u5316\u90e8\u7f72SSD\u81f3\u5173\u91cd\u8981\u3002NAND Flash\u6280\u672f\u7684\u6301\u7eed\u53d1\u5c55\uff0c\u52a0\u4e0a\u65e5\u76ca\u590d\u6742\u7684\u63a7\u5236\u5668\u8bbe\u8ba1\uff0c\u4e3a\u6570\u636e\u4e2d\u5fc3\u8fd0\u8425\u5546\u63d0\u4f9b\u4e86\u6784\u5efa\u9ad8\u6027\u80fdSSD\u89e3\u51b3\u65b9\u6848\u7684\u5f3a\u5927\u5de5\u5177\u3002\u5c55\u671b\u672a\u6765\u53d1\u5c55\uff0cNAND Flash\u5728\u670d\u52a1\u5668SSD\u4e2d\u7684\u4f5c\u7528\u5c06\u53d8\u5f97\u66f4\u52a0\u91cd\u8981\uff0c\u8fd9\u4e9b\u77e5\u8bc6\u5bf9\u670d\u52a1\u5668\u79df\u7528\u884c\u4e1a\u7684IT\u4e13\u4e1a\u4eba\u5458\u6765\u8bf4\u5c06\u53d8\u5f97\u6108\u53d1\u5b9d\u8d35\u3002<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
[vc_row][vc_column][vc_column_text css=””] \u9999\u6e2f\u6570\u636e\u4e2d\u5fc3\u670d\u52a1\u5668SSD\u7684\u6f14\u8fdb \u5728\u9999\u6e2f\u5feb\u901f\u6269\u5f20\u7684\u6570\u636e\u4e2d\u5fc3\u9886\u57df\uff0cNAND Flash\u6280\u672f\u5f7b\u5e95\u6539\u53d8\u4e86\u670d\u52a1\u5668\u5b58\u50a8\u89e3\u51b3\u65b9\u6848\u3002\u4ece\u4f20\u7edfHDD\u5411SSD\u7684\u8f6c\u53d8\u5728\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u4e2d\u9700\u8981\u66f4\u6df1\u5165\u5730\u7406\u89e3NAND Flash\u67b6\u6784\u3002\u5bf9\u4e8e\u7ba1\u7406\u670d\u52a1\u5668\u6258\u7ba1\u8bbe\u65bd\u7684IT\u4e13\u4e1a\u4eba\u5458\u6765\u8bf4\uff0c\u638c\u63e1\u8fd9\u4e9b\u6982\u5ff5\u5bf9\u4e8e\u4f18\u5316SSD\u6027\u80fd\u548c\u53ef\u9760\u6027\u81f3\u5173\u91cd\u8981\u3002\u57fa\u4e8eNAND Flash\u7684SSD\u7684\u6574\u5408\u5df2\u6210\u4e3a\u5b9e\u73b0\u73b0\u4ee3\u4e91\u670d\u52a1\u548c\u4f01\u4e1a\u5e94\u7528\u9ad8\u6027\u80fd\u8981\u6c42\u7684\u57fa\u77f3\u3002 NAND Flash\u57fa\u7840\uff1a\u6df1\u5165\u89e3\u6790 NAND Flash\u91c7\u7528\u77e9\u9635\u914d\u7f6e\u7684\u6d6e\u6805\u6676\u4f53\u7ba1\u3002\u4e0e\u6613\u5931\u6027\u5b58\u50a8\u5668\u4e0d\u540c\uff0c\u8fd9\u4e9b\u6676\u4f53\u7ba1\u901a\u8fc7\u88ab\u56f0\u7535\u5b50\u5728\u65ad\u7535\u540e\u4ecd\u80fd\u4fdd\u6301\u5176\u72b6\u6001\u3002\u5176\u57fa\u672c\u64cd\u4f5c\u6d89\u53ca\u64cd\u7eb5\u6d6e\u6805\u5185\u7684\u7535\u5b50\u72b6\u6001\uff0c\u5b9e\u73b0\u6301\u4e45\u6570\u636eSSD\u3002\u8fd9\u79cd\u67b6\u6784\u5728\u4fdd\u6301\u5408\u7406\u7684\u8bbf\u95ee\u901f\u5ea6\u548c\u80fd\u6e90\u6548\u7387\u7684\u540c\u65f6\uff0c\u53ef\u5b9e\u73b0\u9ad8\u5bc6\u5ea6SSD\u3002 \/\/ NAND Flash\u5355\u5143\u72b6\u6001\u7684\u7b80\u5316\u8868\u793a class NANDCell { private: enum State { ERASED = 1, \/\/ \u51681\uff08\u901a\u5e38\u7ea63V\uff09 PROGRAMMED = 0 \/\/ \u9009\u5b9a\u76840\uff08\u901a\u5e38\u7ea60.5V\uff09 }; public: void Program() { \/\/ \u5411\u63a7\u5236\u6805\u6781\u65bd\u52a0\u7ea620V \/\/ \u7535\u5b50\u96a7\u7a7f\u8fdb\u5165\u6d6e\u6805 state = PROGRAMMED; } void Erase() { \/\/ \u5411\u886c\u5e95\u65bd\u52a0\u7ea620V \/\/ \u7535\u5b50\u4ece\u6d6e\u6805\u4e2d\u96a7\u7a7f\u51fa\u53bb state = ERASED; } […]<\/p>\n
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