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TMDEVM6657时钟配置设定为何? 66.67MHz?100MHz?

Lin Jia-Hung
Prodigy 190 points


在研究BOOTMODE时察觉PLL发现出问题

在Quick Setup Guide中看到的Switch设定如下

SW5[8:1] = 00001000

 其中BM_GPIO[13:11]=SW5[6:4] = 001

设定为66.67MHz

但文件都指出DSP Core Clock为100MHz

请问是设定错误?还是没参考DIP的设定

谢谢

  • 0
    TI__Mastermind 27075 points

    EVM上的DIP开关经过了CPLD的处理转换，你最好读一下寄存器DEVSTAT看看DSP最后被设置的模式是什么。

  • 0 回复 Allen35065
    Prodigy 190 points

    HI Allen Yin:

    我目前查到的设定是

    0 LENDIAN 1 = System is operating in Little Endian mode
    3-1 Boot Device 5 = I2C
    9-4 Parameter Index value = 0
    10 Speed 0 = I2C slow mode
    12-11 Address 1 = Boot from I2C EEPROM at I2C bus address 0x51
    13 Mode 0 = Master mode
    15-14 PCIESSMODE[1:0] 00b = PCIe in End-point mode
    16 PCIESSEN 0 = PCIe module disabled

    原来当选择I2C 时, PLL项目就成为I2C的设定

    而PLL部分文中指出

    2.5.2.6.1 "In this mode, the device will make the initial read of the I2C EEPROM while the PLL is in bypass mode."

    谢谢