F28335的I2C模块产生STOP中断的条件

初次使用F28335的I2C模块，就我的理解，STOP条件只会在读写EEPROM完成时产生，

但根据Example_2833xI2C_eeprom.c例程中的注释：

// If a message receives a NACK during the address setup portion of the
// EEPROM read, the code further below included in the register access ready
// interrupt source code will generate a stop condition. After the stop
// condition is received (here), set the message status to try again.
// User may want to limit the number of retries before generating an error.

似乎还有其他条件下会产生STOP条件，谁能帮我解释一下呀？ 

非常感谢！