SLAA685 December   2015 CC430F6125 , CC430F6125 , CC430F6126 , CC430F6126 , CC430F6127 , CC430F6127 , CC430F6135 , CC430F6135 , CC430F6137 , CC430F6137 , CC430F6147 , CC430F6147 , MSP430AFE221 , MSP430AFE221 , MSP430AFE222 , MSP430AFE222 , MSP430AFE223 , MSP430AFE223 , MSP430AFE231 , MSP430AFE231 , MSP430AFE232 , MSP430AFE232 , MSP430AFE233 , MSP430AFE233 , MSP430AFE251 , MSP430AFE251 , MSP430AFE252 , MSP430AFE252 , MSP430AFE253 , MSP430AFE253 , MSP430BT5190 , MSP430BT5190 , MSP430F1101 , MSP430F1101 , MSP430F1101A , MSP430F1101A , MSP430F1111A , MSP430F1111A , MSP430F112 , MSP430F112 , MSP430F1121 , MSP430F1121 , MSP430F1121A , MSP430F1121A , MSP430F1122 , MSP430F1122 , MSP430F1132 , MSP430F1132 , MSP430F122 , MSP430F122 , MSP430F1222 , MSP430F1222 , MSP430F123 , MSP430F123 , MSP430F1232 , MSP430F1232 , MSP430F133 , MSP430F133 , MSP430F135 , MSP430F135 , MSP430F147 , MSP430F147 , MSP430F1471 , MSP430F1471 , MSP430F148 , MSP430F148 , MSP430F1481 , MSP430F1481 , MSP430F149 , MSP430F149 , MSP430F1491 , MSP430F1491 , MSP430F155 , MSP430F155 , MSP430F156 , MSP430F156 , MSP430F157 , MSP430F157 , MSP430F1610 , MSP430F1610 , MSP430F1611 , MSP430F1611 , MSP430F1612 , MSP430F1612 , MSP430F167 , MSP430F167 , MSP430F168 , MSP430F168 , MSP430F169 , MSP430F169 , MSP430F2001 , MSP430F2001 , MSP430F2002 , MSP430F2002 , MSP430F2003 , MSP430F2003 , MSP430F2011 , MSP430F2011 , MSP430F2012 , MSP430F2012 , MSP430F2013 , MSP430F2013 , MSP430F2013-EP , MSP430F2013-EP , MSP430F2101 , MSP430F2101 , MSP430F2111 , MSP430F2111 , MSP430F2112 , MSP430F2112 , MSP430F2121 , MSP430F2121 , MSP430F2122 , MSP430F2122 , MSP430F2131 , MSP430F2131 , MSP430F2132 , MSP430F2132 , MSP430F2232 , MSP430F2232 , MSP430F2234 , MSP430F2234 , MSP430F2252 , MSP430F2252 , MSP430F2254 , MSP430F2254 , MSP430F2272 , MSP430F2272 , MSP430F2274 , MSP430F2274 , MSP430F233 , MSP430F233 , MSP430F2330 , MSP430F2330 , MSP430F235 , MSP430F235 , MSP430F2350 , MSP430F2350 , MSP430F2370 , MSP430F2370 , MSP430F2410 , MSP430F2410 , MSP430F2416 , MSP430F2416 , MSP430F2417 , MSP430F2417 , MSP430F2418 , MSP430F2418 , MSP430F2419 , MSP430F2419 , MSP430F247 , MSP430F247 , MSP430F2471 , MSP430F2471 , MSP430F248 , MSP430F248 , MSP430F2481 , MSP430F2481 , MSP430F249 , MSP430F249 , MSP430F2491 , MSP430F2491 , MSP430F2616 , MSP430F2616 , MSP430F2617 , MSP430F2617 , MSP430F2618 , MSP430F2618 , MSP430F2619 , MSP430F2619 , MSP430F412 , MSP430F412 , MSP430F413 , MSP430F413 , MSP430F4132 , MSP430F4132 , MSP430F415 , MSP430F415 , MSP430F4152 , MSP430F4152 , MSP430F417 , MSP430F417 , MSP430F423 , MSP430F423 , MSP430F423A , MSP430F423A , MSP430F425 , MSP430F425 , MSP430F4250 , MSP430F4250 , MSP430F425A , MSP430F425A , MSP430F4260 , MSP430F4260 , MSP430F427 , MSP430F427 , MSP430F4270 , MSP430F4270 , MSP430F427A , MSP430F427A , MSP430F435 , MSP430F435 , MSP430F4351 , MSP430F4351 , MSP430F436 , MSP430F436 , MSP430F4361 , MSP430F4361 , MSP430F437 , MSP430F437 , MSP430F4371 , MSP430F4371 , MSP430F438 , MSP430F438 , MSP430F439 , MSP430F439 , MSP430F447 , MSP430F447 , MSP430F448 , MSP430F448 , MSP430F4481 , MSP430F4481 , MSP430F449 , MSP430F449 , MSP430F4491 , MSP430F4491 , MSP430F4616 , MSP430F4616 , MSP430F46161 , MSP430F46161 , MSP430F4617 , MSP430F4617 , MSP430F46171 , MSP430F46171 , MSP430F4618 , MSP430F4618 , MSP430F46181 , MSP430F46181 , MSP430F4619 , MSP430F4619 , MSP430F46191 , MSP430F46191 , MSP430F47126 , MSP430F47126 , MSP430F47127 , MSP430F47127 , MSP430F47163 , MSP430F47163 , MSP430F47166 , MSP430F47166 , MSP430F47167 , MSP430F47167 , MSP430F47173 , MSP430F47173 , MSP430F47176 , MSP430F47176 , MSP430F47177 , MSP430F47177 , MSP430F47183 , MSP430F47183 , MSP430F47186 , MSP430F47186 , MSP430F47187 , MSP430F47187 , MSP430F47193 , MSP430F47193 , MSP430F47196 , MSP430F47196 , MSP430F47197 , MSP430F47197 , MSP430F477 , MSP430F477 , MSP430F478 , MSP430F478 , MSP430F4783 , MSP430F4783 , MSP430F4784 , MSP430F4784 , MSP430F479 , MSP430F479 , MSP430F4793 , MSP430F4793 , MSP430F4794 , MSP430F4794 , MSP430F5212 , MSP430F5212 , MSP430F5214 , MSP430F5214 , MSP430F5217 , MSP430F5217 , MSP430F5219 , MSP430F5219 , MSP430F5222 , MSP430F5222 , MSP430F5224 , MSP430F5224 , MSP430F5229 , MSP430F5229 , MSP430F5232 , MSP430F5232 , MSP430F5234 , MSP430F5234 , MSP430F5237 , MSP430F5237 , MSP430F5239 , MSP430F5239 , MSP430F5242 , MSP430F5242 , MSP430F5244 , MSP430F5244 , MSP430F5247 , MSP430F5247 , MSP430F5249 , MSP430F5249 , MSP430F5252 , MSP430F5252 , MSP430F5253 , MSP430F5253 , MSP430F5254 , MSP430F5254 , MSP430F5255 , MSP430F5255 , MSP430F5256 , MSP430F5256 , MSP430F5257 , MSP430F5257 , MSP430F5258 , MSP430F5258 , MSP430F5259 , MSP430F5259 , MSP430F5304 , MSP430F5304 , MSP430F5308 , MSP430F5308 , MSP430F5309 , MSP430F5309 , MSP430F5310 , MSP430F5310 , MSP430F5324 , MSP430F5324 , MSP430F5325 , MSP430F5325 , MSP430F5326 , MSP430F5326 , MSP430F5327 , MSP430F5327 , MSP430F5328 , MSP430F5328 , MSP430F5329 , MSP430F5329 , MSP430F5333 , MSP430F5333 , MSP430F5335 , MSP430F5335 , MSP430F5336 , MSP430F5336 , MSP430F5338 , MSP430F5338 , MSP430F5340 , MSP430F5340 , MSP430F5341 , MSP430F5341 , MSP430F5342 , MSP430F5342 , MSP430F5358 , MSP430F5358 , MSP430F5359 , MSP430F5359 , MSP430F5418 , MSP430F5418 , MSP430F5418A , MSP430F5418A , MSP430F5419 , MSP430F5419 , MSP430F5419A , MSP430F5419A , MSP430F5435 , MSP430F5435 , MSP430F5435A , MSP430F5435A , MSP430F5436 , MSP430F5436 , MSP430F5436A , MSP430F5436A , MSP430F5437 , MSP430F5437 , MSP430F5437A , MSP430F5437A , MSP430F5438 , MSP430F5438 , MSP430F5438A , MSP430F5438A , MSP430F5500 , MSP430F5500 , MSP430F5501 , MSP430F5501 , MSP430F5502 , MSP430F5502 , MSP430F5503 , MSP430F5503 , MSP430F5504 , MSP430F5504 , MSP430F5505 , MSP430F5505 , MSP430F5506 , MSP430F5506 , MSP430F5507 , MSP430F5507 , MSP430F5508 , MSP430F5508 , MSP430F5509 , MSP430F5509 , MSP430F5510 , MSP430F5510 , MSP430F5513 , MSP430F5513 , MSP430F5514 , MSP430F5514 , MSP430F5515 , MSP430F5515 , MSP430F5517 , MSP430F5517 , MSP430F5519 , MSP430F5519 , MSP430F5521 , MSP430F5521 , MSP430F5522 , MSP430F5522 , MSP430F5524 , MSP430F5524 , MSP430F5525 , MSP430F5525 , MSP430F5526 , MSP430F5526 , MSP430F5527 , MSP430F5527 , MSP430F5528 , MSP430F5528 , MSP430F5529 , MSP430F5529 , MSP430F5630 , MSP430F5630 , MSP430F5631 , MSP430F5631 , MSP430F5632 , MSP430F5632 , MSP430F5633 , MSP430F5633 , MSP430F5634 , MSP430F5634 , MSP430F5635 , MSP430F5635 , MSP430F5636 , MSP430F5636 , MSP430F5637 , MSP430F5637 , MSP430F5638 , MSP430F5638 , MSP430F5658 , MSP430F5658 , MSP430F5659 , MSP430F5659 , MSP430F6433 , MSP430F6433 , MSP430F6435 , MSP430F6435 , MSP430F6436 , MSP430F6436 , MSP430F6438 , MSP430F6438 , MSP430F6458 , MSP430F6458 , MSP430F6459 , MSP430F6459 , MSP430F6630 , MSP430F6630 , MSP430F6631 , MSP430F6631 , MSP430F6632 , MSP430F6632 , MSP430F6633 , MSP430F6633 , MSP430F6634 , MSP430F6634 , MSP430F6635 , MSP430F6635 , MSP430F6636 , MSP430F6636 , MSP430F6637 , MSP430F6637 , MSP430F6638 , MSP430F6638 , MSP430F6658 , MSP430F6658 , MSP430F6659 , MSP430F6659 , MSP430F6745 , MSP430F6745 , MSP430F67451 , MSP430F67451 , MSP430F67451A , MSP430F67451A , MSP430F6745A , MSP430F6745A , MSP430F6746 , MSP430F6746 , MSP430F67461 , MSP430F67461 , MSP430F67461A , MSP430F67461A , MSP430F6746A , MSP430F6746A , MSP430F6747 , MSP430F6747 , MSP430F67471 , MSP430F67471 , MSP430F67471A , MSP430F67471A , MSP430F6747A , MSP430F6747A , MSP430F6748 , MSP430F6748 , MSP430F67481 , MSP430F67481 , MSP430F67481A , MSP430F67481A , MSP430F6748A , MSP430F6748A , MSP430F6749 , MSP430F6749 , MSP430F67491 , MSP430F67491 , MSP430F67491A , MSP430F67491A , MSP430F6749A , MSP430F6749A , MSP430F67621 , MSP430F67621 , MSP430F67621A , MSP430F67621A , MSP430F67641 , MSP430F67641 , MSP430F67641A , MSP430F67641A , MSP430F6765 , MSP430F6765 , MSP430F67651 , MSP430F67651 , MSP430F67651A , MSP430F67651A , MSP430F6765A , MSP430F6765A , MSP430F6766 , MSP430F6766 , MSP430F67661 , MSP430F67661 , MSP430F67661A , MSP430F67661A , MSP430F6766A , MSP430F6766A , MSP430F6767 , MSP430F6767 , MSP430F67671 , MSP430F67671 , MSP430F67671A , MSP430F67671A , MSP430F6767A , MSP430F6767A , MSP430F6768 , MSP430F6768 , MSP430F67681 , MSP430F67681 , MSP430F67681A , MSP430F67681A , MSP430F6768A , MSP430F6768A , MSP430F6769 , MSP430F6769 , MSP430F67691 , MSP430F67691 , MSP430F67691A , MSP430F67691A , MSP430F6769A , MSP430F6769A , MSP430F6775 , MSP430F6775 , MSP430F67751 , MSP430F67751 , MSP430F67751A , MSP430F67751A , MSP430F6775A , MSP430F6775A , MSP430F6776 , MSP430F6776 , MSP430F67761 , MSP430F67761 , MSP430F67761A , MSP430F67761A , MSP430F6776A , MSP430F6776A , MSP430F6777 , MSP430F6777 , MSP430F67771 , MSP430F67771 , MSP430F67771A , MSP430F67771A , MSP430F6777A , MSP430F6777A , MSP430F6778 , MSP430F6778 , MSP430F67781 , MSP430F67781 , MSP430F67781A , MSP430F67781A , MSP430F6778A , MSP430F6778A , MSP430F6779 , MSP430F6779 , MSP430F67791 , MSP430F67791 , MSP430F67791A , MSP430F67791A , MSP430F6779A , MSP430F6779A , MSP430FE423 , MSP430FE423 , MSP430FE4232 , MSP430FE4232 , MSP430FE423A , MSP430FE423A , MSP430FE4242 , MSP430FE4242 , MSP430FE425 , MSP430FE425 , MSP430FE4252 , MSP430FE4252 , MSP430FE425A , MSP430FE425A , MSP430FE427 , MSP430FE427 , MSP430FE4272 , MSP430FE4272 , MSP430FE427A , MSP430FE427A , MSP430FG4250 , MSP430FG4250 , MSP430FG4260 , MSP430FG4260 , MSP430FG4270 , MSP430FG4270 , MSP430FG437 , MSP430FG437 , MSP430FG438 , MSP430FG438 , MSP430FG439 , MSP430FG439 , MSP430FG4616 , MSP430FG4616 , MSP430FG4617 , MSP430FG4617 , MSP430FG4618 , MSP430FG4618 , MSP430FG4619 , MSP430FG4619 , MSP430FG477 , MSP430FG477 , MSP430FG478 , MSP430FG478 , MSP430FG479 , MSP430FG479 , MSP430FR2032 , MSP430FR2032 , MSP430FR2033 , MSP430FR2033 , MSP430FR2110 , MSP430FR2110 , MSP430FR2111 , MSP430FR2111 , MSP430FR2311 , MSP430FR2311 , MSP430FR2433 , MSP430FR2433 , MSP430FR2532 , MSP430FR2532 , MSP430FR2533 , MSP430FR2533 , MSP430FR2632 , MSP430FR2632 , MSP430FR2633 , MSP430FR2633 , MSP430FR4131 , MSP430FR4131 , MSP430FR4132 , MSP430FR4132 , MSP430FR5720 , MSP430FR5720 , MSP430FR5721 , MSP430FR5721 , MSP430FR5722 , MSP430FR5722 , MSP430FR5723 , MSP430FR5723 , MSP430FR5724 , MSP430FR5724 , MSP430FR5725 , MSP430FR5725 , MSP430FR5726 , MSP430FR5726 , MSP430FR5727 , MSP430FR5727 , MSP430FR5728 , MSP430FR5728 , MSP430FR5729 , MSP430FR5729 , MSP430FR5730 , MSP430FR5730 , MSP430FR5731 , MSP430FR5731 , MSP430FR5732 , MSP430FR5732 , MSP430FR5733 , MSP430FR5733 , MSP430FR5734 , MSP430FR5734 , MSP430FR5735 , MSP430FR5735 , MSP430FR5736 , MSP430FR5736 , MSP430FR5737 , MSP430FR5737 , MSP430FR5738 , MSP430FR5738 , MSP430FR5739 , MSP430FR5739 , MSP430FR5847 , MSP430FR5847 , MSP430FR58471 , MSP430FR58471 , MSP430FR5848 , MSP430FR5848 , MSP430FR5849 , MSP430FR5849 , MSP430FR5857 , MSP430FR5857 , MSP430FR5858 , MSP430FR5858 , MSP430FR5859 , MSP430FR5859 , MSP430FR5867 , MSP430FR5867 , MSP430FR58671 , MSP430FR58671 , MSP430FR5868 , MSP430FR5868 , MSP430FR5869 , MSP430FR5869 , MSP430FR5870 , MSP430FR5870 , MSP430FR5872 , MSP430FR5872 , MSP430FR58721 , MSP430FR58721 , MSP430FR5887 , MSP430FR5887 , MSP430FR5888 , MSP430FR5888 , MSP430FR5889 , MSP430FR5889 , MSP430FR58891 , MSP430FR58891 , MSP430FR5922 , MSP430FR5922 , MSP430FR59221 , MSP430FR59221 , MSP430FR5947 , MSP430FR5947 , MSP430FR59471 , MSP430FR59471 , MSP430FR5948 , MSP430FR5948 , MSP430FR5949 , MSP430FR5949 , MSP430FR5957 , MSP430FR5957 , MSP430FR5958 , MSP430FR5958 , MSP430FR5959 , MSP430FR5959 , MSP430FR5967 , MSP430FR5967 , MSP430FR5968 , MSP430FR5968 , MSP430FR5969 , MSP430FR5969 , MSP430FR5969-SP , MSP430FR5969-SP , MSP430FR59691 , MSP430FR59691 , MSP430FR5970 , MSP430FR5970 , MSP430FR5972 , MSP430FR5972 , MSP430FR59721 , MSP430FR59721 , MSP430FR5986 , MSP430FR5986 , MSP430FR5987 , MSP430FR5987 , MSP430FR5988 , MSP430FR5988 , MSP430FR5989 , MSP430FR5989 , MSP430FR5989-EP , MSP430FR5989-EP , MSP430FR59891 , MSP430FR59891 , MSP430FR5994 , MSP430FR5994 , MSP430FR6820 , MSP430FR6820 , MSP430FR6822 , MSP430FR6822 , MSP430FR68221 , MSP430FR68221 , MSP430FR6870 , MSP430FR6870 , MSP430FR6872 , MSP430FR6872 , MSP430FR68721 , MSP430FR68721 , MSP430FR6877 , MSP430FR6877 , MSP430FR6879 , MSP430FR6879 , MSP430FR68791 , MSP430FR68791 , MSP430FR6887 , MSP430FR6887 , MSP430FR6888 , MSP430FR6888 , MSP430FR6889 , MSP430FR6889 , MSP430FR68891 , MSP430FR68891 , MSP430FR6920 , MSP430FR6920 , MSP430FR6922 , MSP430FR6922 , MSP430FR69221 , MSP430FR69221 , MSP430FR6927 , MSP430FR6927 , MSP430FR69271 , MSP430FR69271 , MSP430FR6928 , MSP430FR6928 , MSP430FR6970 , MSP430FR6970 , MSP430FR6972 , MSP430FR6972 , MSP430FR69721 , MSP430FR69721 , MSP430FR6977 , MSP430FR6977 , MSP430FR6979 , MSP430FR6979 , MSP430FR69791 , MSP430FR69791 , MSP430FR6987 , MSP430FR6987 , MSP430FR6988 , MSP430FR6988 , MSP430FR6989 , MSP430FR6989 , MSP430FR69891 , MSP430FR69891 , MSP430FW423 , MSP430FW423 , MSP430FW425 , MSP430FW425 , MSP430FW427 , MSP430FW427 , MSP430FW428 , MSP430FW428 , MSP430FW429 , MSP430FW429 , MSP430G2001 , MSP430G2001 , MSP430G2101 , MSP430G2101 , MSP430G2102 , MSP430G2102 , MSP430G2111 , MSP430G2111 , MSP430G2112 , MSP430G2112 , MSP430G2121 , MSP430G2121 , MSP430G2131 , MSP430G2131 , MSP430G2132 , MSP430G2132 , MSP430G2152 , MSP430G2152 , MSP430G2153 , MSP430G2153 , MSP430G2201 , MSP430G2201 , MSP430G2202 , MSP430G2202 , MSP430G2203 , MSP430G2203 , MSP430G2210 , MSP430G2210 , MSP430G2211 , MSP430G2211 , MSP430G2212 , MSP430G2212 , MSP430G2213 , MSP430G2213 , MSP430G2221 , MSP430G2221 , MSP430G2230 , MSP430G2230 , MSP430G2231 , MSP430G2231 , MSP430G2232 , MSP430G2232 , MSP430G2233 , MSP430G2233 , MSP430G2252 , MSP430G2252 , MSP430G2253 , MSP430G2253 , MSP430G2302 , MSP430G2302 , MSP430G2303 , MSP430G2303 , MSP430G2312 , MSP430G2312 , MSP430G2313 , MSP430G2313 , MSP430G2332 , MSP430G2332 , MSP430G2333 , MSP430G2333 , MSP430G2352 , MSP430G2352 , MSP430G2353 , MSP430G2353 , MSP430G2402 , MSP430G2402 , MSP430G2403 , MSP430G2403 , MSP430G2412 , MSP430G2412 , MSP430G2413 , MSP430G2413 , MSP430G2432 , MSP430G2432 , MSP430G2433 , MSP430G2433 , MSP430G2444 , MSP430G2444 , MSP430G2452 , MSP430G2452 , MSP430G2453 , MSP430G2453 , MSP430G2513 , MSP430G2513 , MSP430G2533 , MSP430G2533 , MSP430G2544 , MSP430G2544 , MSP430G2553 , MSP430G2553 , MSP430G2744 , MSP430G2744 , MSP430G2755 , MSP430G2755 , MSP430G2855 , MSP430G2855 , MSP430G2955 , MSP430G2955 , MSP430L092 , MSP430L092 , MSP430TCH5E , MSP430TCH5E , MSP430V294 , MSP430V294

 

  1.   MSP Code Protection Features
    1.     Trademarks
    2. 1 Introduction
    3. 2 Locking JTAG Across Different MSP Families
      1. 2.1 Physical JTAG Fuse (F1xx/F2xx/F4xx)
      2. 2.2 Electronic Fuse or Lock Without Password
        1. 2.2.1 F5xx/F6xx Electronic Fuse Implementation
        2. 2.2.2 FR5xx/FR6xx Electronic Fuse Implementation (Lock without password)
        3. 2.2.3 FR2xx/FR4xx Electronic Fuse Implementation
        4. 2.2.4 MSP430i2xx Electronic Fuse Implementation – Start-Up Code (SUC)
      3. 2.3 JTAG Lock With Password (FR5xx/FR6xx)
        1. 2.3.1 Using JTAG Lock With Password in CCS
        2. 2.3.2 Using JTAG Lock With Password in IAR
    4. 3 IP Encapsulation (IPE)
      1. 3.1 IP Encapsulation Using the IPE Tool in CCS
        1. 3.1.1 CCS Linker File Features for IPE
        2. 3.1.2 Placing Code and Data in the IPE Sections in CCS
        3. 3.1.3 Enabling IPE in CCS Project Options
        4. 3.1.4 Viewing the Compiler-Selected IPE partitioning in CCS
        5. 3.1.5 Running and Testing IPE Code in CCS
          1. 3.1.5.1 Debug Settings With IPE in CCS
          2. 3.1.5.2 Testing IPE in CCS
      2. 3.2 IP Encapsulation Using the IPE Tool in IAR
        1. 3.2.1 IAR Linker File Features for IPE
        2. 3.2.2 Placing Code and Data in the IPE Sections in IAR
        3. 3.2.3 Enabling IPE in IAR Project Options
        4. 3.2.4 Viewing the Compiler-Selected IPE Partitioning in IAR
        5. 3.2.5 Running and Testing IPE Code in IAR
          1. 3.2.5.1 Debug Settings With IPE in IAR
          2. 3.2.5.2 Testing IPE in IAR
    5. 4 Bootloader (BSL) Security Features
      1. 4.1 Password Protection
      2. 4.2 Mass Erase on Incorrect Password
      3. 4.3 Disabling Bootloader (BSL)
    6. 5 References

4.2 Mass Erase on Incorrect Password

By default, on most MSP430 bootloaders, an incorrect BSL password results in mass erase of the device. The mass erase causes all code to be erased. This feature adds another layer of security by helping to prevent someone from doing a "brute force" guessing of the password by trying every combination of 32 bytes. If the password is not correct on the first attempt, the part is mass erased and now there is no code to be read out. See the corresponding device user's guide to determine if a particular device supports this feature. A BSL mass erase does not erase the IPE regions and IPE security settings are retained, if enabled.

The mass erase also erases the IVT, so after one bad password attempt the firmware is gone and the BSL password then returns to the default blank value of FFh for all 32 bytes. This means that after one bad password the default password can then be used to access the device – this helps for cases where perhaps a bad load or corrupted firmware was present in the device, where the BSL password may not be correct, by still allowing for a load of new firmware. This should be considered however as a possibility if there is a concern about unauthorized sources being able to load new firmware into the unit – in that case, other measures may need to be taken.

Bootloaders that the support mass erase on incorrect password feature also provide a way to disable this feature if desired. This is done by setting a BSL signature in the device memory to indicate that mass erase should not occur on an incorrect BSL password. More information on disabling this feature can be found in the BSL user's guide or device user's guide. Note that in this case the device may be vulnerable to more "brute force" type of attempts to guess the password.

Table 9. BSL Signature Functionality on MSP430FR5xx/FR6xx Devices

Name Addresses Value Device Security
BSL Password FFE0h–FFFFh User Defined + Vector Table Configuration This password must be provided by BSL host before the device is accessible by the BSL.
BSL Signature FF84h–FF87h 5555_5555h BSL is disabled.
AAAA_AAAAh BSL is password-protected. Mass erase on wrong BSL password feature is disabled.
Any other value BSL is password-protected. Mass erase on wrong BSL password.

Table 10. BSL Signature Functionality on MSP430F1xx/F2xx/F4xx Devices

Name Addresses Value Device Security
BSL Password FFE0h–FFFFh User Defined + Vector Table Configuration This password must be provided by BSL host before the device is accessible by the BSL.
BSL Signature Data word beneath the IVT(1) AA55h BSL is disabled.
0000h BSL is password-protected. Mass erase on wrong BSL password feature is disabled.
Any other value BSL is password-protected. Mass erase on wrong BSL password.
(1) The start of the IVT varies depending on the device. Refer to the "Memory Organization" section of the device-specific data sheet. For example, the MSP430F2131 IVT starts at FFE0h. Therefore, the BSL signature on that device is located at FFDEh–FFDFh.