1. SPI hardware interface
GPIO54 ------- SPISIMOA
GPIO55 ------- SPISOMIA
GPIO56 ------- SPCLK
GPIO57 ------- SPSTEA
Configure IO functions: As shown in the figure above, if you need to ...
2. About the direction of embedded systems Embedded systems are undoubtedly one of the hottest and most promising IT application fields. Embedded systems are used on some specific dedicated devices. U...
I need a circuit diagram urgently. It requires AT89C52 control, 2 1M flash memory, an EEPROM, 4*4 keyboard, 8 LED digital display, an RS232 interface, and needs to be controlled by IIC. Please help me...
We should know that there is a switching power supply that is realized by PWM wave, but do you know that negative voltage can also be output through PWM wave?Negative voltage generation circuit diagra...
I've been developing simulation software recently, which requires strong real-time performance. In order to facilitate development and user use, I don't want to change the operating system. I saw that...
Circuit Function and Advantages
The circuit shown in Figure 1 generates a high voltage signal that controls the capacitance of a BST (barium strontium titanate) capacitor. The BST capacitance can be c...