* Question What are the common formats for commands (requests) and responses, and what are the formats for VICC states and their transitions? * Answer 1.Command (request) format 2.Response format 3) r ...
* Question What are the characteristics of WiFi technology? * Answer Wide range of radio waves, fast speed, high reliability, no wiring, health and safety ...
* Question What are the characteristics of the PCA82C250/251? * Answer (1) Fully compliant with IS0 11898; (2) High rate (suitable for CAN 5kb/s to 1Mb/s rate range); (3) With transient interference i ...
* Question Why do you have sequential execution statements in Verilog? * Answer There are two reasons. The first is that many timing devices are time-dependent. For example, the D flip-flop is based o ...
* Question What conditions should the CPU respond to interrupts? * Answer (1) An interrupt source issues an interrupt request; (2) The interrupt enable bit EA=1, that is, the CPU open interrupt; (3) T ...
* Question What steps should be taken to initialize the keyboard? * Answer 1 Mask the keyboard interrupt by setting the keyboard status and the IMASKK bit of the control register. 2 Start the KB1 pin ...
* Question What is a cold reset? * Answer Cold reset: When the power supply voltage and other signals of the IC card are added in a certain order from the stationary (parking) state, it is called cold ...
* Question What are the main features of the ARM9E series of microprocessors? * Answer Support DSP instruction set, suitable for high-speed digital signal processing; 5-level integer pipeline, maximum ...
* Question What is NVRAM? * Answer NVRAM (non-volatile RAM) does not lose information after the power is turned off.This is different from most normal memory, which requires a constant power source to ...
* Question What are the types of photoelectric sensors? * Answer The first type of photoelectric sensor measurement system converts the measured light into a continuously changing photocurrent, which ...