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
表 17-1描述了 I2C 状态更改中断标志。
中断标志 | 中断条件 |
---|---|
UCALIFG | 仲裁丢失。在两个或两个以上的发送器同时开始发送数据时,或者是当 USCI 作为主器件工作,但被系统中其他主器件作为从器件来寻址时,可能会发生仲裁丢失。当仲裁丢失时,UCALIFG 标志被置位。当 UCALIFG 被置位时,UCMST 位被清零,同时 I2C 模块变成一个从器件。 |
UCNACKIFG | 无应答中断。当接收不到预期的应答时此标志被置位。当接收到一个起始条件时,UCNACKIFG 被自动清零。 |
UCSTTIFG | 起始条件检测到的中断。在受控模式下,当 I2C 模块检测到一个带有其本地地址的起始条件时,该标志会被置位。UCSTPIFG 只能在受控模式下使用,并且在接收到一个停止条件时被自动清零。 |
UCSTPIFG | 停止条件检测到的中断。在受控模式下,当 I2C 模块检测到一个停止条件时,该标志会被置位。UCSTPIFG 只能在受控模式下使用,并且在接收到一个起始条件时被自动清零。 |