QueryCAT Logo
Search 5,000,000+ questions and answers.

Frequently Asked Questions

What is an MCU?

TKO Video Conferencing FAQ - MCU, Codec, H.320/H.323, Equipm...
MCU stands for Multipoint Control Unit. It is a device that is used to connect more than two video conferencing endpoints at a time into one video conference session. Much like a large audio conference, an MCU joins multiple video conferencing participants into a single conference, allowing them to see and interact with each other.

Do I have to program the microcontroller?

MIDIsense FAQ
If you buy a kit the microcontroller comes preprogrammed. You will know because when you turn it on the MIDI light will blink orange once.

How can I connect KC module to microcontroller?

Cytron Technologies - Robot . Head to Toe
Although both device is low voltage powered, a voltage divider is proposed to ensure that RxD of Bluetooth module is not damaged by 5V from TxD of microcontroller. A simple voltage divider can be implemented using resistor or 3.3V zener diode. RTS and CTS of Bluetooth module can be connected to each (shorted) if the baud rate <= 115.2 Kbps.

How to send AT command using microcontroller?

Cytron Technologies - Robot . Head to Toe
Microcontroller must be configure to the correct baud rate for UART, setup UART configuration according to each microcontroller spec. Microcontroller must send AT command in Hex code. Try to search for ASCII to Hex code converter in website. Here is one: http://centricle.com/tools/ascii-hex/ . For example, to send "AT", microcontroller should send 0x41 and follow by 0x54.

Question: Do I need a microcontroller to use this part?

E-Field Sensor Contest
Answer: Depending on the particular design, an MCU may not be needed. To fully utilize the capabilities of the MC33794 would suggest some form of program control done by an MCU with an on-board analog-to-voltage converter. The choice of the MCU is the designer's.

Do I need an MCU or EEPROM together with the nRF24Z1?

Nordic Semiconductor Technical FAQ
We recommend that you to use a MCU on the ATX and an EEPROM on the ARX. This kind of setup has many advantages:- Gives access to all nRF24Z1 features- System can change all audio parameters - Gives system full control of external circuitry in the ARX (DAC/codecs, volume control...

How much power does the Flight MCU take?

CubeSat Kit - FAQ
The Flight MCU uses an ultra-low-power microcontroller. At full speed, [1] the entire Flight Module should consume no more than 20mA @ +3.3V (66mW). By taking advantage of the MSP430's power-saving design and the event-driven Salvo RTOS, the average current should drop to well below 1mA (3.3mW).

What are the MCU, PPM and EEPROM?

Nokia Flash Reverse Electronic Engineering - FAQ: NOKIAFREE ...
The MCU (Micro Control Unit) SW is the main software which initialises the phone on startup, and where all the needed functions for proper operation of phone is stored. So the MCU is actually your phone's operating system. Don't mess with MCU SW unless you wish to UPGRADE current software with new one, that have fixed bugs, or got some new functions. The MCU of the Nokia is based on ARM architecture (Advanced Risc Machine). Most of the code uses Thumb instructions.

What microcontroller packages should I consider?

FAQ
We highly recommend the BasicX-24 package which uses an AVR as its microcontroller. It uses a subset of Basic as a programming syntax that has a generous function library that makes complicated routines easy. The compiler interface is also a snap! You can get one of these up and running within minutes!

Whether it is possible to interface an FPAA output with a microcontroller?

Welcome to ni2designs
Yes, the user can connect FPAA outputs to a microcontroller for further processing. But only the dedicated output can be connected to the microcontroller, because these are the only ports which can be configured as digital outputs. For microcontroller interface the output ports have to be configured as digital outputs and the signal connected to these ports should be passes through a SAR ADC CAM.

How do I configure the nRF24Z1 from MCU, without using an EEPROM?

Nordic Semiconductor Technical FAQ
The easiest way is to first use the z1config utility to set all desired values. Then generate the EEPROM hex file which contain all the configuration. Now open the hex file: :100000000B83010048000000000000000000000613 :100010001C344C183048142C441028400C243C0844 :100020002038041E3...

How is the HT46 MCU A/D Converter setup?

Holtek Semiconductor - Cost-Effective A/D Type MCU Series
Select the channel for A/D conversion by setting ACS2, ACS1 and ACS0. Note the channel selected should be configured in the previous step. Set ADCR.7=0 -->1-->0 to start the A/D conversion, EOCB=1 indicating A/D conversion is in process. Wait 76 TAD periods to complete the A/D conversion, EOCB=0 indicating the end of A/D conversion and interrupt request flag ADF=1

What equipment do I need to program the Flight MCU?

CubeSat Kit - FAQ
All you need beyond the CubeSat kit is a PC with a parallel port and a compiler / Integrated Development Environment (IDE). You will need a compiler to develop software for this MCU. Low-cost compilers and IDEs are commercially available. We recommend Rowley's CrossWorks 430 IDE. The CubeSat Kit contains all of the hardware required to connect a PC to the Development Board and Flight MCUs for downloading, programming and debugging.

Can I leave the Flight MCU on all the time while in orbit?

CubeSat Kit - FAQ
Theoretically, yes. Its power consumption is so small (especially in its power-saving modes) that you can probably leave it on all the time.

What makes Cortex-M3 more desirable than an ARM7TDMI MCU?

Luminary Micro
Luminary Micro chose to build the company’s microcontrollers on the Cortex-M3 core because we believe that Cortex-M3 is the technology that will obsolete ARM7.

What are the differences between the MCS 251 microcontroller A-Stepping and C-Stepping?

Intel(R) MCS(R) 251 Microcontroller Components - Hardware De...
The C-stepping of the device came out in May 1996; there are several differences. The configuration bytes CONFIG0 and CONFIG1 were renamed to UCONFIG0 and UCONFIG1. The user must program these configuration bytes. Please refer to the 8XC251SA/SB/SP/SQ User's Manual on Intel's Developer site, as well as the latest 8XC251SA/SB/SP/SQ Specification Update. In the C-stepping of the MCS 251 microcontroller, a new address line on P1.7 has been added allowing for 18-bit addressing.

When Using the MCS 251 Microcontroller, 8xC251SX, does the stack grow up or down?

Intel(R) MCS(R) 251 Microcontroller Components - Hardware De...
The stack grows in the upward direction. In other words, the stack pointer is incremented depending on the number of bytes pushed to the stack.

Should unused pins on the MCS 251 Microcontroller, 8xC251SX, be tied to Vcc or Vss?

Intel(R) MCS(R) 251 Microcontroller Components - Hardware De...
Ports 1, 2 and 3 have fixed internal s and are referred to as quasi-bi-directional ports. Port 0 is a true bi-directional port (open drain); i.e., the port pins float when configured as input pins. If port 0 is not used, it is advisable to terminate the pins with pull-up resistors or pull the pins to ground in order to avoid floating. All other control pins have internal pull-up resistors. It is up to the user to determine if unused pins require a pull down to Vss.

What happens when an interrupt occurs when using an MCS 251 microcontroller?

Intel(R) MCS(R) 251 Microcontroller Components - Hardware De...
A typical interrupt event chain occurs as follows. An internal or external device initiates an interrupt request signal. This signal, connected to an input pin and periodically sampled by the MCS 251 microcontroller, 8xC251SX, latches the event into a flag buffer. The interrupt handler compares the priority of the flag to the priority of other interrupts. A high priority causes the handler to set an interrupt flag. This signals the instruction execution unit to execute a context switch.
More Questions >>

© Copyright 2007-2012 QueryCAT
About • Webmasters • Contact