ZHCU032K December 2004 – August 2022 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253 , MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2132-EP , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2252-Q1 , MSP430F2254 , MSP430F2272 , MSP430F2272-Q1 , MSP430F2274 , MSP430F2274-EP , MSP430F233 , MSP430F2330 , MSP430F235 , MSP430F2350 , MSP430F2370 , MSP430F2410 , MSP430F2416 , MSP430F2417 , MSP430F2418 , MSP430F2419 , MSP430F247 , MSP430F2471 , MSP430F248 , MSP430F2481 , MSP430F249 , MSP430F2491 , MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2201-Q1 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2231 , MSP430G2231-Q1 , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2444 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2544 , MSP430G2553 , MSP430G2744 , MSP430G2755 , MSP430G2855 , MSP430G2955 , MSP430TCH5E
用 LOCKA 位将信息内存的段 A 与所有其它段分开锁定。当 LOCKA = 1 时,无法对段 A 进行写入或擦除,并且在批量擦除或生产编程期间,所有信息存储器都受到保护,不会被擦除。当 LOCKA = 0 时,可以像任何其他闪存段一样对段 A 进行擦除和写入,并且在批量擦除或生产编程期间所有信息存储器都被擦除。
当一个 1 被写入 LOCKA 位时,它的状态被切换。将一个 0 写入 LOCKA 无效。这样可在无需更改的情况下,使用现有的闪存编程例程。
; Unlock SegmentA
BIT #LOCKA,&FCTL3 ; Test LOCKA
JZ SEGA_UNLOCKED ; Already unlocked?
MOV #FWKEY+LOCKA,&FCTL3 ; No, unlock SegmentA
SEGA_UNLOCKED ; Yes, continue
; SegmentA is unlocked
; Lock SegmentA
BIT #LOCKA,&FCTL3 ; Test LOCKA
JNZ SEGA_LOCKED ; Already locked?
MOV #FWKEY+LOCKA,&FCTL3 ; No, lock SegmentA
SEGA_LOCKED ; Yes, continue
; SegmentA is locked