MTK GPIO在复位时的状态!help

niuniu302

Upon hardware reset (SYSRST#), GPIOs are all configured as inputs and the following alternative
usages of GPIO pins are enabled:
  These GPIOs are used to latch the inputs upon reset to memorize the desired configuration to make
sure that the system restarts or boots in the right mode.
——这段该怎么解释？特别是下面一句。
来自于 MTK 规格书。不知大家有没有注意。