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  • k64 datasheet学习笔记10---Signal Multiplexing and Signal Descriptions

    1.前言

    本文主要描述多功能引脚相关的内容,包括5个32位的引脚的端口,每个32pin端口被指定一个中断

    2.Signal Multiplexing Integration

    3. Port control and interrupt summary

    4. PCRn reset values for port A

    PCRn bit reset values for port A are 1 for the following bits:
    • For PCR0: bits 1, 6, 8, 9, and 10.
    • For PCR1 to PCR4: bits 0, 1, 6, 8, 9, and 10.
    • For PCR5 : bits 0, 1, and 6.
    All other PCRn bit reset values for port A are 0

    5.Clock gating

    The clock to the port control module can be gated on and off using the SCGC5[PORTx] bits in the SIM module.

    6. Signal multiplexing constraints

    1. A given peripheral function must be assigned to a maximum of one package pin. Do
    not program the same function to more than one pin.
    2. To ensure the best signal timing for a given peripheral's interface, choose the pins in
    closest proximity to each other.

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  • 原文地址:https://www.cnblogs.com/smartjourneys/p/8076282.html
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