Other Parts Discussed in Thread: OPA690 , DEM-OPA-SO-1A 工程师您好:我用OPA690实现了一个负电阻电路,在没有任何输入的情况下,给负电阻电路提供正负5V的供电电压,发现输出端的电压一会是3.773V,一会又变为-3.821V,这是什么原因呢? 在电路中反馈电阻R=46Ω,
HI Shine,
1.现在我们板子的状态就是SPI0接口挂了一个nor flash,量测DSP的发给flash的clk,MOSI,CS都是正常的,就是flash给DSP的返回值是FF,这个现象会和我选择的flash有关吗?我的flash的型号是GD25S512MDYIGR,规格书在附件中,能帮忙看下吗?谢谢 GD25S512MDFIG.pdf
Hello Chen,
I assume you have monitored the output of SRC and you see it is giving 44.1K not 48K.
There are bits that need to be set in some registers such as :
Register 07: Transmitter Control Register 1 bits TXDIV[1:0] that are used to select the Transmitter…