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M24LR04E-R 数据表(PDF) 98 Page - STMicroelectronics |
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M24LR04E-R 数据表(HTML) 98 Page - STMicroelectronics |
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98 / 142 page ![]() Command codes M24LR04E-R 98/142 Doc ID 022208 Rev 5 26.12 Get System Info When receiving the Get System Info command, the M24LR04E-R sends back its information data in the response.The Option_flag is not supported. The Get System Info can be issued in both Addressed and Non Addressed modes. The Protocol_extension_flag must be set to 0. Table 70 shows the M24LR04E-R response to the Get System Info command depending on the value of the Protocol_extension_flag. Request parameter: ● Request flags ● UID (optional) Response parameters: ● Information flags set to 0Fh. DSFID, AFI, Memory Size and IC reference fields are present. ● UID code on 64 bits ● DSFID value ● AFI value ● Memory size. The M24LR04E-R provides 128 blocks (7Fh) of 4 bytes (03h) ● IC reference: the 8 bits are significant. Response parameter: ● Error code as Error_flag is set: – 03h: Option not supported Table 69. Get System Info request format Request SOF Request _flags Get System Info UID(1) 1. Gray means that the field is optional. CRC16 Request EOF 8 bits 2Bh 64 bits 16 bits Table 70. Get System Info response format when Protocol_extension_flag = 0 and Error_flag is NOT set Response SOF Response _flags Information flags UID DSFID AFI Memory size IC ref. CRC 16 Response EOF 00h 0Fh 64 bits 8 bits 8 bits 037F 5A 16 bits Table 71. Get System Info response format when Error_flag is set Response SOF Response_flags Error code CRC16 Response EOF 01h 8 bits 16 bits |
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