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
当 VLDx 位从 0 到其他非零值改变时,它将应用一个自动的稳定延迟 td (SVSon)从而允许 SVS 电路去结算。td (SVSon) 延迟约为 50µs。在本次延迟期间,SVS 将不会标志一个低电压状态或复位器件,并且 SVSON 被清除。软件可以检测 SVSON 位来确定延迟何时会过去及 SVS 何时正常的监控电压。在 SVSON=0 期间,写入 SVSCTL 将会中止 SVS自动的结算延迟,td(SVSon),并立即切换 SVS 到激活模式。这样做,SVS 电路可能不会被结算,就会导致不可预知的行为。
当 VLDx 位从 0 到其他非零值改变时,电路需要时间 t稳定去结算。稳定时间 t稳定最大为 ~12 µs。设置特定器件数据表。没有阻止 SVSFG 被置位或器件复位的自动延迟可使用。在不同水平间的切换建议流程显示在下列的代码中。
; Enable SVS for the first time:
MOV.B #080h,&SVSCTL ; Level 2.8V, do not cause POR
; ...
; Change SVS level
MOV.B #000h,&SVSCTL ; Temporarily disable SVS
MOV.B #018h,&SVSCTL ; Level 1.9V, cause POR
; ...