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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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FTS64K 数据表(PDF) 21 Page - Freescale Semiconductor, Inc |
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FTS64K 数据表(HTML) 21 Page - Freescale Semiconductor, Inc |
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21 / 44 page  FTS64K Block User Guide — Version V01.00 21 The FSEC register is loaded from the Flash Protection/Options field byte at $FF0F during the reset sequence, indicated by “F” in Figure 3-3. KEYEN — Enable backdoor key to security. 1 = backdoor to Flash is enabled. 0 = backdoor to Flash is disabled. NV[6:2] — Non Volatile Flag Bits. These 5 bits are available to the user as non-volatile flags. SEC[1:0] — Memory Security Bits. The SEC[1:0] bits define the security state of the device as shown in Table 3-4. If the Flash is unsecured using the Backdoor Key Access, the SEC bits are forced to 10. The security function in the Flash module is described in section 4.5. 3.3.3 RESERVED1 This register is reserved and is not accessible to the user. Register address BASE + $102 Figure 3-4 RESERVED 1 Table 3-4 Security States SEC[1:0] Description 00 secured 01 secured 10 unsecured 11 secured 76543210 R 00000000 W Reset: 00000000 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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