AP163702

The AP163702 has many points of features, the first is overview about the different reset sources: during reset, the device executes a special internal sequence in order to set inside signals and the special function registers to their specified default values. The contents of some special function registers are controlled during system startup configuration via PORT0.

The second is overview about PORT0 configuration during reset:PORT0 startup configuration is sampled either with the end of the internal reset sequence or with the end of the external hardware reset. If the external RSTIN signal is deactivated before the end of the internal reset sequence (short hardware reset) then an internal reset signal (IRS) of AP163702 is used to latch the system startup configuration at PORT0, else (power-on reset or long hardware
reset) PORT0 is latched after the rising edge of RSTIN with the IRS.

And the third one is calculation of the pull-up/down resistors at PORT0 for startup configuration. If you want to know more information such as the electrical characteristics about the AP163702, please download the datasheet in www.seekic.com or www.chinaicmart.com .