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请问AM3352 GPIO内部上拉电阻大小是多少?

本帖最后由 一只耳朵怪 于 2018-6-21 10:24 编辑

在Datasheets中找不到关于芯片管脚设置内部上下拉的电阻的大小,谁能告诉我是多少?或者告诉我在Datasheets中什么地方有描述?

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余少虹

2018-6-21 02:36:45
AM335x的内部上下拉阻值请参考:

e2e.ti.com/.../214911
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h1654155275.5814

2018-6-21 02:55:53
引用: vuywsdfwf 发表于 2018-6-21 02:36
AM335x的内部上下拉阻值请参考:

e2e.ti.com/.../214911

点击进去之后,只看到“Access Denied (Note: a common reason this message is displayed is because the thread was deleted)
You do not have permission to view/download this item.”,这个怎么解?
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余少虹

2018-6-21 03:09:08
引用: kasonandy 发表于 2018-6-21 02:55
点击进去之后,只看到“Access Denied (Note: a common reason this message is displayed is because the thread was deleted)
You do not have permission to view/download this item.”,这个怎么解?

The values of the internal pullup/pulldown resistors are not directly stated. They can be derived from the Il parameter in Table 3-7 of the datasheet. Leakage currents with pullup/pulldown resistors enabled in the range of 80 - 240uA, typically 100uA. This would give a typical value of 18kOhm at 1.8V, or 33kOhm at 3.3V for 100uA leakage.
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