TI中文支持网1）tms320c6713b芯片手册48页中有一段备注：
‡ IPD = Internal pulldown, IPU = Internal pullup. [To oppose the supply rail on these IPD/IPU signal pins, use external pullup or pulldown resistors no greater than 4.4 kΩ and 2.0 kΩ, respectively.]
请问To oppose the supply rail on these IPD/IPU signal pins具体什么意思？是防止电源干扰的意思吗？
2）‡ IPD = Internal pulldown, IPU = Internal pullup. [To oppose the supply rail on these IPD/IPU signal pins, use external pullup or pulldown resistors no greater than 4.4 kΩ and 2.0 kΩ, respectively.]
§ To ensure a proper logic level during reset when these pins are both routed out and 3−stated or not driven, it is recommended to include an external 10 kΩ pullup/pulldown resistor to sustain the IPU/IPD, respectively.
上面两段话中我理解意思是一个要求上下拉电阻应不大于4.4 kΩ和2.0 kΩ，另一段要求上下拉电阻应为10 kΩ，这两段话是否相互矛盾？
请各位专家帮忙解答下，非常感谢！
noaming：
2，这里就是指内部如果已经有下拉，现在要在外边再加一个下拉电阻以稳定下拉状态，则需要的阻值。
qidi xiong：
回复 noaming:
你好，非常感谢你的解答，请问tms320c6713b的trst引脚内部接的到底是上拉还是下拉？我现外部接的是1k的下拉电阻，是否有影响？
noaming：
回复 qidi xiong:
tms320c6713b的trst引脚内部是下拉的
noaming：
回复 qidi xiong:
这里加1K应该是有影响的，可以加10k。
http://c6000.spectrumdigital.com/dsk6713/revc/
这是EVM的设计，参考一下
