请问BlueNRG ota升级中ota_sw_activation变量上电是随机值吗？

最近在看BlueNRG ota升级代码时有一个疑惑，ota_sw_activation变量是一个未初始化的值，按照ram特性上电应该是一个随机值，那么在OTA_Check_ServiceManager_Operation()函数中判断值就可能存在偶然的误操作？
if (ota_sw_activation == OTA_APP_SWITCH_OP_CODE_GO_TO_OTA_SERVICE_MANAGER) //Go to OTA Service manager  {    /* Unlock the Flash */    flash_sw_lock = FLASH_UNLOCK_WORD;    /* Set Invalid valid tag x OTA Application with OTA Service Manager  for allowing jumping to OTA Service manager */    FLASH_ProgramWord(APP_WITH_OTA_SERVICE_ADDRESS + OTA_TAG_VECTOR_TABLE_ENTRY_OFFSET, OTA_INVALID_OLD_TAG);    /* Lock the Flash */    flash_sw_lock = FLASH_LOCK_WORD;    /* Reset Service Manager ram location */     ota_sw_activation = OTA_INVALID_OLD_TAG;   }