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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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MPL460AT-I/4LB bảng dữ liệu(PDF) 24 Page - Microchip Technology |
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MPL460AT-I/4LB bảng dữ liệu(HTML) 24 Page - Microchip Technology |
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24 / 48 page  PL460 Bootloader Data Sheet © 2020-2023 Microchip Technology Inc. and its subsidiaries DS60001666D - 24 Write an Encrypted Program when Keys are already Written (continued) Command Description 0x00000000_0001_EEEEEEEE… Write the program at consecutive addresses from 0x00000000 0x00000000_0013_00000000 Launch code decryption 0x00000000_0012_00000000 Check bootloader status to know if decrypt process has finished. Answers: • 0x”Bootloader Hardware signature”_0000_ 00000002 (aes_active) • 0x”Bootloader Hardware signature”_0000_ 00000000 (bootloader ready) 0x00000000_0002_XXXXXXXX… (Optional) Read the decrypted program to validate it (READ_RAM fuse must not be set) 0x400E1800_0000_00000000 Clear CPUWAIT to start program operation 0x00000000_A66A_00000000 Give control of the MISO signal to M7-SPI and disable bootloader clock 7.4.8.3. Write Decryption Keys, or Control Bits, in the Fuse Boxes Command Description 0x00000000_DE05_5345ACBA After reset, unblock the bootloader 0x00000000_DE05_ACBA5345 0x00000000_0007_XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX Write the decryption key KEY_ENC in the Buffer register 0x00000000_0008_00000000 Write the Buffer register to the Tamper register for KEY_ENC_FUSES 0x00000000_000C_00000000 Blow fuses at corresponding fuse box 0x00000000_0012_00000000 Check bootloader status to see if the process of blowing fuses has finished. Answers: • 0x”Bootloader Hardware signature”_0000_ 00000001 (fuse blowing active) • 0x”Bootloader Hardware signature”_0000_ 00000000 (bootloader ready) 0x00000000_0007_XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX Write the signature/authentication key KEY_TAG in the Buffer register 0x00000000_0009_00000000 Write the Buffer register to the Tamper register for KEY_TAG_FUSES 0x00000000_000C_00000000 Blow fuses at corresponding fuse box 0x00000000_0012_00000000 Check bootloader status to see if the process of blowing fuses has finished. Answers: • 0x”Bootloader Hardware signature”_0000_ 00000001 (fuse blowing active) • 0x”Bootloader Hardware signature”_0000_ 00000000 (bootloader ready) 0x00000000_0007_XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX Write the signature/authentication key KEY_TAG in the Buffer register 0x00000000_000B_00000000 Write the Buffer register to the Tamper register for CONTROL_FUSES 0x00000000_000C_00000000 Blow fuses at corresponding fuse box 0x00000000_0012_00000000 Check bootloader status to see if the process of blowing fuses has finished. Answers: • 0x”Bootloader Hardware signature”_0000_ 00000001 (fuse blowing active) • 0x”Bootloader Hardware signature”_0000_ 00000000 (bootloader ready) 0x00000000_0010_00000000 Read CONTROL_FUSES fuse value to its Tamper register to load the new value in the system 7.4.8.4. Read Decryption Keys, or Control Bits, from the Fuse Boxes Command Description 0x00000000_DE05_5345ACBA After Reset, unblock the bootloader 0x00000000_DE05_ACBA5345 0x00000000_000D_00000000 Read fuse box values for KEY_ENC and write them to the corresponding Tamper register |
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