ADI 微转换器突破性的技术ADI

简介：ADI 微转换器突破性的技术

问：请问芯片是否具有USB接口？
答： No. You have to use the paralle interface to external USB controller. This is the cheapest way.

问：我的ADUC812的A/D转换会出现一路正常，另外的路转换数据不正常，会是什么原因引起的？谢谢！
答： it can be some reason, from switch to writing to memory. Please give you local ADI office the detailed schematic and code for analysis.

问：ADuC812的故障报警功能是否对有些程序有冲突，编程时是否应该注意？
答： You can read the register by your program. If you use watch dog, you must re-write it every a short time period.

问：DAC的驱动能力有多大？能直接驱动LED或者LCD吗？
答： The maximum driver load is 10K@ 2.5V. You can not direct drive LED.

问：请问，在线调试时，为什么总是只能收到低8位和高8位的数据，中间的数据总是不能接收？
答： I am not sure what you mean. Do you mean serial conmunication with Frame? Please contact us later.

问：我的PCB上有一些速度很高的逻辑电路，如何连接到微转换器而不影响它的模拟性能？
答： If your logic signal edge is very fast, then you"d better use series resister around 200ohm to slow the edge, thus it will not influence analog part performance.

问：ADmC812有两个DAC, 我如何使两个DAC的输出电压同步更新？
答： The 2 D/A is seperated, so every point of D/A output is at the same time.

问：产品中的模拟地和数字地在PCB排版时能否合而为一？
DAC的输出有没有三态逻辑功能？或者说有没有高阻抗输出?
答： You"d better put ADuC in single ground. Yes DAC has tri-state output.

问：：我怎样使ADmC812的内部电压基准源有效和无效？内部电压基准源有效后，基准电压稳定时间有多长？
答： When you enable ADC or DAC (via relative SFR), the internal reference will automatically be enabled. It will require 65ms to settle after it"s enabled.

问：AVDD，DVDD是否可以是不同的电压？比如AVDD=5V，DVDD=3V
答： For the ADuC812/14 have to use the same supply voltage but the ADuC816/24 can be seperate the power supply.