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LRIS2K 数据表(PDF) 13 Page - STMicroelectronics |
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LRIS2K 数据表(HTML) 13 Page - STMicroelectronics |
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13 / 102 page  LRIS2K Description 13/102 1.1 Memory mapping The LRIS2K is divided into 64 blocks of 32 bits as shown in Table 2. Each block can be individually read- and/or write-protected using a specific lock or password command. The user area consists of blocks that are always accessible. Read and Write operations are possible if the addressed block is not protected. During a Write, the 32 bits of the block are replaced by the new 32-bit value. The LRIS2K also has a 64-bit block that is used to store the 64-bit unique identifier (UID). The UID is compliant with the ISO 15963 description, and its value is used during the anticollision sequence (Inventory). This block is not accessible by the user and its value is written by ST on the production line. The LRIS2K also includes an AFI register in which the application family identifier is stored, and a DSFID register in which the data storage family identifier used in the anticollision algorithm is stored. The LRIS2K has four additional 32-bit blocks in which the Kill code and the password codes are stored. Table 2. Memory map Add 0 7 8 15 16 23 24 31 Protect status 0 User area 5 bits 1 User area 5 bits 2 User area 5 bits 3 User area 5 bits 4 User area 5 bits 5 User area 5 bits 6 User area 5 bits 7 User area 5 bits 8 User area 5 bits User area 5 bits User area 5 bits User area 5 bits 60 User area 5 bits 61 User area 5 bits 62 User area 5 bits 63 User area 5 bits UID 0 UID 1 UID 2 UID 3 UID 4 UID 5 UID 6 UID 7 AFI DSFID 0 Kill code 5 bits 1 Password code 1 5 bits 2 Password code 2 5 bits 3 Password code 3 5 bits |
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