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HT56R67 Datasheet(PDF) 33 Page - Holtek Semiconductor Inc

Part # HT56R67
Description  TinyPower A/D Type with LCD 8-Bit OTP MCU
Download  129 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT56R67 Datasheet(HTML) 33 Page - Holtek Semiconductor Inc

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HT56R67/HT56R668/HT56C668/HT56R678/HT56C678/HT56R688
Rev. 1.70
2014-04-04
33
A/D 输入
该单片机具有一个多通道的 A/D 转换器输入。所有的模拟输入与 PB 口的 I/O 引脚共用。
如果想要将这些引脚设置为 A/D 输入引脚而非普通的输入/输出引脚,用户则应要正确地对 A/D
转换寄存器中相应的位进行正确的设置。 配置中没有与 A/D 功能有关的选项。如果这些引脚作为
I/O 引脚使用,仍可以通过寄存器选择是否要接上拉电阻。然而如果作为 A/D 输入使用,则这些引
脚上的上拉电阻会自动断开。
I/O 引脚结构
所附图表显示了 I/O 引脚的内部结构。I/O 引脚的精确逻辑结构可能不同于这些图所示,它们提
供的仅作为参考,以协助功能性的理解 I/O 引脚。附图中引脚共用结构并不适用于所有类型。
普通输入/输出口结构


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