Ten Daily Electronic Common Sense-Section 8

What are the registers in the ARM state?

In the ARM state, the 16 general-purpose registers RO and Rl5 and one or two status registers (CPSR and SPSR) can be accessed at any time.The user mode has exactly the same register as the system mode, where R0 to R7 are general-purpose registers shared by all modes.

What are the main features of the MAX1312?

1. In order to preserve the phase information of the MAX1312 multi-channel, the input channels are all dedicated T/H speakers.·
2. To improve the bandwidth of the input signal under AC conditions, a wideband buffer (>50MHz) is used to drive the input to drive the ADC’s input capacitance (15pF) and quickly settle the signal. Although both voltage slew rate and bandwidth are important, the most critical aspect of input buffer specifications is settling time, which is required for most applications in order to achieve 12-bit accuracy.·
3. The input sampling circuit has a small signal bandwidth of 20MHz, which enables it to digitize high-speed transient signals. Due to the use of undersampling technology, it can measure periodic signals whose bandwidth exceeds the ADC sampling rate. To avoid aliasing of high frequency signals with the frequency band of interest, an antialiasing filter is recommended.
4. The MAX1312 offers great flexibility in internal or external reference and internal or external clock selection, and is easy to use.

What are the characteristics of the DM9000A?

• 48-pin LQFP package
• Support processor interface: I/O port byte or word command to read and write internal memory·
• Integrated adaptive (AUT0-MDIX) 10/100 Mbyte transceiver
• Half duplexBack pressure mode of mode flow control
• Flow control of IEEE802.3x full duplex mode;Link state change and remote wakeup
• Built-in l6 KB SRAM
• Built-in 3.3 to 2.5 V regulator
• Support for outgoing transmission
• Support for IP/TCP/UDP checksum generation
• Support for automaticLoad the manufacturer ID and product ID in the EEPROM
• Optional EEPROM configuration

What are the debugging tools embedded in the Quartus II software？

The debugging tools embedded in the Quartus II are SignalTap II (Online Logic Analyzer) and SignalProbe (Signal Probe).Common board-level simulation verification tools include Mentor Tau, Synopsys HSPICE, and Innoveda BLAST.

What properties should the material of the protective sleeve have?

Good air tightness, stable physical and chemical properties, good thermal conductivity, and sufficient mechanical strength.

What are the advantages of IGBT?

1. IGBT switching devices generate less heat.
2. High carrier control, which significantly improves the output current waveform.
3. The switching frequency is high, which makes it exceed the feeling range of the human ear, that is, the operation is quieted.
4. The driving power is small and the volume tends to be smaller.

Which three types of chemical sensors can be classified depending on the mode of conversion and the output electrical signal?

Depending on the mode of conversion and the electrical signal output, chemical sensors can be classified into three types: potential type, current type, and conductance type.

According to whether the social attributes of the nodes are used to assist the routing algorithm decision and design, what are the two routing algorithms in the delay network?

Social-aware routing algorithms and non-social-aware routing algorithms.
In the social-aware routing algorithm, according to whether the routing algorithm adopts the “community” attribute, it is further divided into “community-based social-aware routing algorithm” and “community-independent social-aware routing algorithm”.
Among the non-social-aware routing algorithms, we further divide them into “infrastructure-assisted routing algorithms” and “non-infrastructure-assisted routing algorithms” according to whether infrastructure-assisted routing algorithms are needed.

One of the simplest Bluetooth LE core systems includes four bottom-level modules, what are they?

One of the simplest Bluetooth LE core systems includes four lowest-level modules and their associated protocols, as well as two common service layer protocols—the Common Attribute Profile (GATT) and the Generic Access Profile (GAP).The former includes Security Management (SM), Attribute Agreement (ATT), and overall profile requirements.

From the system design point of view, what are the main issues related to driving white LEDs?

There are three main related issues: 1 to provide a high efficiency power supply; 2 to adjust the white LED current; 3 when the light is off, to ensure that the white LED is completely disconnected from the power supply.