Ten Daily Electronic Common Sense-Section 36

What types of ARM data processing instructions are there?

Data processing instructions can be roughly divided into three categories: data transfer instructions (such as MOV, MVN), arithmetic and logic operation instructions (such as ADD, SUB, AND) and comparison instructions (such as CMP, TST).

What are the impedance matching techniques for electronic tag antennas?

1. Horizontal bar loading
2. Inductive coupling
3. Capacitive coupling (inductive loading of open-ended stubs)
4. Series stub feed
5. T-type matching network
6. Embedding gap matching

How to check the triggering ability?

First, connect the black test lead to the A pole, the red test lead to the K pole, and the resistance is infinite, which proves that the device is turned off. Then follow the steps described in F.  
①Put an F GA pole with the tip of the red test pen, and then disengage it (but the red test pen is always connected to the A pole), which is quite j-to G. A negative pulse is applied to the pole, and if the resistance decreases rapidly, the device has the ability to trigger. ②Pull the GK pole with the black test pen, and then disengage it, which is equivalent to losing A to the GK pole. The iE pulse,} the resistance decreases rapidly, indicating the ability to trigger.

What are the characteristics of networked smart sensors?

1. The introduction of embedded technology and integrated circuit technology reduces the power consumption of the sensor, reduces the size, improves the anti-interference and reliability, and can better meet the needs of engineering applications.
2. The introduction of the processor makes the sensor a combination of hardware and software, which can judge and make decisions to a certain extent according to the input signal value, and realize the functions of self-correction and self-protection. The application of software technologies such as nonlinear compensation, zero drift and temperature compensation enables the sensor to have high linearity and measurement accuracy. At the same time, a large amount of information is processed by the sensor, which also reduces the amount of information transmission between the field equipment and the main control station, which improves the reliability and real-time performance of the system.
3. The application of network interface technology enables the sensor to easily access the network, which provides great convenience for the expansion and maintenance of the system. At the same time, the sensor can be connected to the network nearby, which changes the point-to-point connection between traditional sensors and specific measurement and control equipment, thus significantly reducing the complexity of field wiring.

What is the richness of the Verilog hardware description language?

The richness of the Verilog hardware description language is reflected in the following two aspects: First, the richness of the circuit structure itself. Second, the richness of language description methods.
First, to achieve the same function, a variety of circuit structures or architectures can be used. Second, different description styles and methods can be used to implement the same circuit architecture.

What are the main functions of the TWL2213 Li-Ion battery charger control circuit?

1. Perform the charging function and provide necessary signals for external circuits.
2. Provide two A/D converter inputs to complete the measurement function.
3. Control the oscillator generation circuit to generate the clock signal with the main clock frequency of 500kHz for the TWL2213.

What is the register protected by the PRCR register?

1. Registers protected by the PRC0 bit: CM0, CM1, CM2, PLC0 and PCLKR registers.
2. Registers protected by the PRCl bit: PM0, PM1, PM2, TB2SC, INVC0, and INVCl registers.
3. Registers protected by the PRC2 bit: PD9, $3C and $4C registers.
4. Registers protected by the PRC3 bit: VCR2 and D4INT registers.

What is the zero potential error of the Hall element?

The zero potential error of Hall element includes unequal potential, parasitic DC potential, induced zero potential and self-excited magnetic field zero potential.

What types of modules are supported by the time base period high resolution shadow registers?

Type 1 ePWM module.

What are the main features of MPLS?

1. MPLS packet forwarding in the network is based on fixed-length labels, which simplifies the forwarding mechanism and makes it easy to expand the capacity of forwarding routers to the terabit level.
2. Fully adopt the original IP routing and improve it on this basis to ensure the flexibility of MPLS network routing.
3. Adopt the efficient transmission and switching mode of ATM, abandon the complex ATM signaling, and seamlessly integrate the advantages of IP technology into the efficient hardware forwarding of ATM.
4. MPLS network data transmission and routing calculation are separated, which is a connection-oriented transmission technology, which can provide effective QoS guarantee.
5. MPLS not only supports a variety of network layer technologies, but also is a technology independent of the link layer. It also supports X. 25. Frame Relay, ATM, PPP, SDH, DWDM… ensure the interconnection and interoperability of various networks, so that various technologies are unified on the same MPLS platform.
6. MPLS supports large-scale hierarchical networks and has good network scalability.
7. MPLS label combining mechanism supports combined transmission of different data streams.
8. MPLS supports traffic engineering, CoS, QoS, etc.
9. The standardization of MPLS is very fast, which is the key to its rapid popularization and success.