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LRI64 数据表(PDF) 37 Page - STMicroelectronics |
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LRI64 数据表(HTML) 37 Page - STMicroelectronics |
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37 / 52 page ![]() LRI64 Command codes 37/52 18.5 Get System Info When receiving the Get System Info command, the LRI64 send back its information data in the Response.The Option_Flag is not supported and must be set to 0. The Get System Info can be issued in both addressed and non addressed modes. The Request Frame (Figure 26) contains: ● Request Flags (Table 3 and Table 4) ● Get System Info Command Code (2Bh, Table 9) ● Unique ID (Optional) ● 2-byte CRC (Figure 15) If there is no error, at the LRI64, the Response Frame (Figure 27) contains: ● Response Flags (Table 6) ● Information Flags set to 0Fh, indicating the four information fields that are present (DSFID, AFI, Memory Size, IC Reference) ● Unique ID ● DSFID value (as written in block 9) ● AFI value (as written in block 8) ● Memory size: for the LRI64, there are 15 blocks (0Eh) of 1 byte (00h). ● IC Reference: only the 6 most significant bits are used. The product code of the LRI64 is 00 0101b=5d ● 2-byte CRC (Figure 15) Otherwise, if there is an error, the Response Frame (Figure 28) contains: ● Response Flags (01h, Table 6) ● Error Code (0Fh, Table 7) ● 2-byte CRC (Figure 15) Figure 34. Get System Info, request frame format Figure 35. Get System Info, response frame format, when Error_Flag is not set Figure 36. Get System Info, response frame format, when Error_Flag is set AI09738 Request SOF Request Flags Command Code UID 2-Byte CRC Request EOF 8 bits 8 bits 2Bh 64 bits 16 bits AI09739 Response SOF Response Flags Information Flags UID 2-Byte CRC Response EOF 8 bits 00h 8 bits 0Fh 64 bits 16 bits DSFID 8 bits AFI 8 bits Memory Size 16 bits 000Eh IC Ref 8 bits 000101xxb AI09740 Response SOF Response Flags Error Code 2-Byte CRC Response EOF 8 bits 01h 8 bits 0Fh 16 bits |
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