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25#
发表于 2010-6-27 17:29:10
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来自: 广东茂名 来自 广东茂名
本帖最后由 scq330 于 2010-6-27 17:32 编辑
谢谢逸风一直的帮助,现请教pdf中的这个说明,好像说高电平是1.2v什么的,英文看不懂。
pdf说明如下:
文本文字如下:
VID0, VID1, VID2, VID3, VID4, VID5, VID6, and VID7
These are the inputs for the internal DAC that provides the
reference voltage for output regulation. These pins respond to
TTL logic thresholds. These pins are internally pulled high, to
approximately 1.2V, by 40µA internal current sources for Intel
modes of operation, and pulled low by 20µA internal current
sources for AMD modes of operation. The internal pull-up
current decreases to 0 as the VID voltage approaches the
internal pull-up voltage. All VID pins are compatible with
external pull-up voltages not exceeding the IC’s bias voltage
(VCC).
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