pin configuration

基本解釋

The selected function for the GP3/MCLR pin is input, and you must enable the global weak-pullup bit in the microcontroller's configuration word.
GP3/MCLR管腳的可選功能為輸入，在微處理器配置命令中，必須使能全局弱上拉位。
yheda.com
Optional user-supplied clock input. Synchronizes the initialization of one or more devices. This pin can be used as a user I/O pin after configuration.
用戶可選的時(shí)鐘輸入。同步一個(gè)或多個(gè)芯片的初始化（配置）。在配置完成后這個(gè)管腳可以當(dāng)做普通的I/O口。
blog.sina.com.cn
Research includes as following: MIFARE 1 card features, functional composition, storage structure and MIFARE 1 card reading equipment core modules features, pin configuration, operating principles.
研究?jī)?nèi)容包括：MIFARE 1射頻卡的特點(diǎn)、功能組成、存儲(chǔ)結(jié)構(gòu)以及MIFARE 1卡讀寫設(shè)備核心模塊的特點(diǎn)、管腳排列、工作原理等。