551
CHAPTER 24 512K-BIT FLASH MEMORY
24.9
Flash Security Feature
Flash security feature provides possibilities to protect the content of the flash memory.
■
Abstract
By writing the protection code of "01
H
" to the security bit in the flash memory, access to the flash memory
is restricted. Once the flash memory is protected, performing the chip erase operation only can unlock the
function. Otherwise, read/write access to the flash memory from the external pins is not possible.
This function is suitable for applications requiring security of self-containing and data stored in the flash
memory.
Address of the security bit depends on the size of built-in flash memory. Table 24.9-1 shows the address of
security bit.
■
How to Enable the Flash Security Feature
After writing the protection code "01
H
" to the security bit, the following external reset or power-on enables
the Flash Security Feature.
■
How to Disable the Flash Security Feature
Performing the chip erase operation.
■
Behavior Under the Flash Security Feature
Read operation: invalid data read
Write operation: ignored
■
Others
(1) About configuration of the general-purpose parallel programmer, please follow to the specification of
parallel programmer.
(2) Writing the protection code at the last of flash memory programming is recommended, in order to
prevent the device from enabling the Flash Security Feature accidentally.
Notes:
•
The flash security bit is allocated in the flash memory area. When the protection code "01
H
" is written to
the security bit, it is locked by the security. So, when not using the security function, do not write "01
H
"
to this address.
See Table 24.9-1 for the address of the security bit.
•
By specifying the sector of the flash memory, it cannot be locked the security per sector. It is the
security function for all areas in the flash memory.
•
The FLASH memory trouble in the state to put security cannot be analyzed at all.
Table 24.9-1 Address of Flash Security Bit
Flash memory size
Address of security bit
MB90F362/T(S), MB90F367/T(S)
Built-in 512K-bit flash memory
FF0001
H
Содержание F2MCTM-16LX
Страница 2: ......
Страница 3: ...FUJITSU LIMITED F2MCTM 16LX 16 BIT MICROCONTROLLER MB90360 Series HARDWARE MANUAL ...
Страница 4: ......
Страница 42: ...26 CHAPTER 1 OVERVIEW ...
Страница 66: ...50 CHAPTER 2 CPU MOV ILM imm8 The instruction is executed normally but the prefix affects the next instruction ...
Страница 70: ...54 CHAPTER 2 CPU ...
Страница 134: ...118 CHAPTER 6 CLOCK SUPERVISOR ...
Страница 176: ...160 CHAPTER 8 LOW POWER CONSUMPTION MODE ...
Страница 194: ...178 CHAPTER 10 I O PORTS ...
Страница 252: ...236 CHAPTER 13 16 Bit I O TIMER ...
Страница 282: ...266 CHAPTER 14 16 BIT RELOAD TIMER ...
Страница 295: ...279 CHAPTER 15 WATCH TIMER ORG 00FFDCH Reset vector set DSL START DB 00H Set to single chip mode VECT ENDS END START ...
Страница 296: ...280 CHAPTER 15 WATCH TIMER ...
Страница 386: ...370 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 426: ...410 CHAPTER 20 LIN UART Figure 20 5 2 ORE Flag Set Timing RDRF ORE Reception data ...
Страница 540: ...524 CHAPTER 22 ADDRESS MATCH DETECTION FUNCTION ...
Страница 568: ...552 CHAPTER 24 512K BIT FLASH MEMORY ...
Страница 633: ...617 APPENDIX B Instructions Table B 9 3 Bit Operation Instruction Map first byte 6CH ...
Страница 634: ...618 APPENDIX Table B 9 4 Character String Operation Instruction Map first byte 6EH ...
Страница 635: ...619 APPENDIX B Instructions Table B 9 5 2 byte Instruction Map first byte 6FH MUL MULW DIVU A A A ...
Страница 637: ...621 APPENDIX B Instructions Table B 9 7 ea Instruction 2 first byte 71H ...
Страница 638: ...622 APPENDIX Table B 9 8 ea Instruction 3 first byte 72H ...
Страница 639: ...623 APPENDIX B Instructions Table B 9 9 ea Instruction 4 first byte 73H ...
Страница 640: ...624 APPENDIX Table B 9 10 ea Instruction 5 first byte 74H ...
Страница 641: ...625 APPENDIX B Instructions Table B 9 11 ea Instruction 6 first byte 75H ...
Страница 642: ...626 APPENDIX Table B 9 12 ea Instruction 7 first byte 76H ...
Страница 643: ...627 APPENDIX B Instructions Table B 9 13 ea Instruction 8 first byte 77H ...
Страница 644: ...628 APPENDIX Table B 9 14 ea Instruction 9 first byte 78H ...
Страница 645: ...629 APPENDIX B Instructions Table B 9 15 MOVEA RWi ea Instruction first byte 79H ...
Страница 646: ...630 APPENDIX Table B 9 16 MOV Ri ea Instruction first byte 7AH ...
Страница 647: ...631 APPENDIX B Instructions Table B 9 17 MOVW RWi ea Instruction first byte 7BH ...
Страница 648: ...632 APPENDIX Table B 9 18 MOV Ri ea Instruction first byte 7CH ...
Страница 649: ...633 APPENDIX B Instructions Table B 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Страница 650: ...634 APPENDIX Table B 9 20 XCH Ri ea Instruction first byte 7EH ...
Страница 651: ...635 APPENDIX B Instructions Table B 9 21 XCHW RWi ea Instruction first byte 7FH ...
Страница 664: ...648 APPENDIX ...
Страница 665: ...649 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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