What is SPI LPC2148?
The Serial Peripheral Interface (SPI) is a bus interface connection protocol originally started by Motorola Corp. SPI Interface uses four wires for communication. Hence it is also known as four wire serial communication protocol. SPI is a full duplex master-slave communication protocol.
What is the use of LPC2148?
The application program, using IAP functions may also erase and/or program the FLASH while the application is running. When the LPC2148 on chip bootloader is used, 500kB of flash memory is available for user code. RAM Memory System: LPC2148 provides 32kB of static RAM which may be used for code and/or data storage.
What is pinsel in LPC2148?
PINSEL Register It means that the pin can either act as an Input or Output with no specific functions. There are totally three PINSEL registers in LPC2148 Controller in order to control the functions of the Pins in the respective ports.
What is the function of pinsel1 register in LPC2148?
Any pin on the LPC2148 can have a maximum of 4 functions. Hence in order to select one of the four functions, two corresponding bits of the PINSEL register are needed. So, a 32-bit PINSEL register can control 16 pins with 2-bits to control each pin. PINSEL0 controls PORT0 pins P0.
Which of the following is an advantage of SPI?
Which of the following is an advantage of SPI? Explanation: As we don’t have start and stop bits, so the data can be streamed continuously without interruption.
How many PLL modules are there in LPC2148?
two PLLs
In LPC2148 microcontrollers there are two PLLs which provide programmable frequencies to the CPU and USB System. [PLL0: For System Clock, PLL1: For USB Clock. 4. ARM7 LPC2148 Microcontroller needs two clocks; one is for its peripherals and other for its CPU.
How many interrupt sources are there in LPC2148?
Out of the possible 32 interrupt requests, 16 interrupt requests can be defined as Vectored IRQ. In this 16 slots, any of the 22 interrupts that are available in LPC2148 can be assigned….Interrupt Related Registers in LPC2148.
| Interrupt Source | Source number In Decimal |
|---|---|
| USB | 22 |
How many devices can be connected to SPI?
You can connect not only two SPI devices but also three or more SPI devices to Arduino. If you takes a look to SPI reference, you will know that SPI requires four pins: MOSI, MISO, SCK, and SS . Among them: Three pins (MOSI, MISO, SCK) must be shared between SPI devices.
What is the disadvantage of SPI interface?
Disadvantages of SPI: It requires more signal lines (wires) than other communications methods. The communications must be well-defined in advance (you can’t send random amounts of data whenever you want) The controller must control all communications (peripherals can’t talk directly to each other)
Which is the fastest bus in LPC2148 microcontroller?
Advanced High performance Bus
VLSI Peripheral Bus (VPB) for other onchip peripherals. AHB acts as a bridge for VPB. The ARM7 core is connected to the Advanced High performance Bus (AHB) • This is the Fastest Bus in ARM7 core.
What are different source of interrupt in LPC2148?
Interrupt Related Registers in LPC2148
| Interrupt Source | Source number In Decimal |
|---|---|
| ADC0 | 18 |
| I2C1 | 19 |
| BOD | 20 |
| ADC1 | 21 |
How many capture registers are there in LPC2148?
Each Timer has four 32-bit Match Registers and four 32-bit Capture Registers.
How do you calculate baud rate UART in LPC2148?
Baudrate Calculation LPC1768 generates the baud rate depending on the values of DLM,DLL. Using the above parameters , DLL/DLM is calculated as below. (256 * DLL + DLM) = PCLK / (16* Baudrate).
How do I get LPC2148 in Keil?
Click on Download MDK-Core.
- Install the software by following the simple instructions provided during installation process.
- Install the executable file that will be downloaded.
- Go to the Project tab.
- Type in LPC2148 in search and select the device under NXP with the name LPC2148 and click on OK.
What happens when 8 bits are transferred in the SPI?
What happens when 8 bits are transferred in the SPI? Explanation: The interrupts are locally generated when 8-bits are transferred so that the data can be read before the next byte is clocked through.
Which is a predecessor of SPI?
Explanation: Microwire often spelled uwire, is essential a predecessor od SPI and a trademark of National Semiconductor.
Which LCD display is present in LPC2148 Developmentboard?
On-board two line LCD Display
Which LCD display is present in LPC 2148 Development Board? Explanation: On-board two line LCD Display (2*16) with jumper selection option to disable LCD when not required.
What is the width of address bus of LPC2148?
Features of LPC2148 On-chip static RAM is 8 kB-40 kB, on-chip flash memory is 32 kB-512 kB, the wide interface is 128 bit, or accelerator allows 60 MHz high-speed operation. It takes 400 milliseconds time for erasing the data in full chip and 1 millisecond time for 256 bytes of programming.
What is UART in LPC2148?
UART (Universal Asynchronous Receiver/Transmitter) is a serial communication protocol in which data is transferred serially bit by bit at a time. Asynchronous serial communication is widely used for byte oriented transmission. In Asynchronous serial communication, a byte of data is transferred at a time.
What is SPI Mcq?
SPI is described as Asynchronous serial interface. Explanation: The SPI is accurately described as a synchronous interface, but it is different from the synchronous serial interface(SSI) protocol, which is also a employs differential signaling and provides only a single simplex communication channel.