What are the pinout for the female connector that is used with iPhone 13?

I am developing an accessory to work with iPhone 13. I am trying to find the pinout or even better if I can find the electrical spec sheet for the female lightning connector on iPhone 13. I want to know how can I wire it to my MCU and if iPhone can talk to MCU's without any additional hardware like Authentication 3.0 Coprocessor. I red the Accessory Interface Specification several times and I still can't find answers to my questions.