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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC912XDP512F0MPVR 데이터시트(PDF) 1117 Page - Freescale Semiconductor, Inc |
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PC912XDP512F0MPVR 데이터시트(HTML) 1117 Page - Freescale Semiconductor, Inc |
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1117 / 1348 page  Chapter 27 512 Kbyte Flash Module (S12XFTX512K4V2) MC9S12XDP512 Data Sheet, Rev. 2.21 Freescale Semiconductor 1119 All possible Flash protection scenarios are shown in Figure 27-11. Although the protection scheme is loaded from the Flash array at global address 0x7F_FF0D during the reset sequence, it can be changed by the user. This protection scheme can be used by applications requiring re-programming in single chip mode while providing as much protection as possible if re-programming is not required. 2 FPLDIS Flash Protection Lower Address Range Disable — The FPLDIS bit determines whether there is a protected/unprotected area in a specific region of the Flash memory beginning with global address 0x7F_8000. 0 Protection/Unprotection enabled. 1 Protection/Unprotection disabled. 1–0 FPLS[1:0] Flash Protection Lower Address Size — The FPLS[1:0] bits determine the size of the protected/unprotected area as shown in Table 27-14. The FPLS[1:0] bits can only be written to while the FPLDIS bit is set. Table 27-12. Flash Protection Function FPOPEN FPHDIS FPLDIS Function1 1 For range sizes, refer to Table 27-13 and Table 27-14. 1 1 1 No Protection 1 1 0 Protected Low Range 1 0 1 Protected High Range 1 0 0 Protected High and Low Ranges 0 1 1 Full Flash memory Protected 0 1 0 Unprotected Low Range 0 0 1 Unprotected High Range 0 0 0 Unprotected High and Low Ranges Table 27-13. Flash Protection Higher Address Range FPHS[1:0] Global Address Range Protected Size 00 0x7F_F800–0x7F_FFFF 2 Kbytes 01 0x7F_F000–0x7F_FFFF 4 Kbytes 10 0x7F_E000–0x7F_FFFF 8 Kbytes 11 0x7F_C000–0x7F_FFFF 16 Kbytes Table 27-14. Flash Protection Lower Address Range FPLS[1:0] Global Address Range Protected Size 00 0x7F_8000–0x7F_83FF 1 Kbytes 01 0x7F_8000–0x7F_87FF 2 Kbytes 10 0x7F_8000–0x7F_8FFF 4 Kbytes 11 0x7F_8000–0x7F_9FFF 8 Kbytes Table 27-11. FPROT Field Descriptions (continued) Field Description |
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