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 mode fault in SPI?
Exception conditions –Mode Fault • If the SSEL signal goes active, when the SPI block is a master, this indicates another master has selected the same device to be a slave. This condition is known as a mode fault. • When a mode fault is detected, the mode fault (MODF) bit in the status register will be activated.
Can communication in LPC2148?
CAN bus is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other within a vehicle without a host computer. The CAN communication protocol is a CSMA/CD protocol.
How is SPI communication frequency set?
Set the Serial Peripheral Interface (SPI) clock frequency. The micro:bit sets the rate of data transfer and control timing for a SPI connection. This data rate and timing signal is controlled by the SCK pin. The signal on this pin is clocked using the frequency set for it.
What are the limitations of the SPI interface?
Drawbacks or disadvantages of SPI ➨No flow control and no acknowledgment used in SPI. ➨Master and Slave relationships mapped to the devices can not be altered unlike I2C interface. ➨Master may not be aware whether slave is present or absent. Handshaking is needed using software.
Which register in LPC2148 contains PLL multiplier and divider values?
The PLLCON register contains the bits that enable and connect the PLL. Enabling the PLL allows it to attempt to lock to the current settings of the multiplier and divider values. Connecting the PLL causes the processor and all chip functions to run from the PLL output clock.
How do we set the SPI to operate in the master mode 1?
How do we set the SPI, to operate in the master mode 1? Explanation: In SPI, to make it work in the master mode, we make the MSTR bit is equal to 1 and for operating it in the mode 1 we make the CPOL=0 and CPHA=1. 8.
What is SPI master mode?
In master mode, the SPI generates the synchronous communication clock at one of four master frequencies. For most 68HC08 MCUs, the maximum bus frequency is 8 MHz, allowing up to 4 MHz master mode clock rates. In slave mode, the SPI can operate at clock rates up to the bus frequency, or 8 MHz in most 68HC08 MCUs.
Who is the founder of LPC2148 board?
| Q. | Who is the founder of LPC2148 board? |
|---|---|
| C. | motorola |
| D. | philips |
| Answer» d. philips | |
| Explanation: arm lpc2148 is arm7tdmi-s core board microcontroller that uses 16/32-bit 64 pin(lqfp) microcontroller no.lpc2148 from philips(nxp). |
What is FIFO in LPC2148?
LPC2148 has inbuilt 16byte FIFO for Receiver/Transmitter. Thus it can store 16-bytes of data received on UART without overwriting. If the data is not read before the Queue(FIFO) is filled then the new data will be lost and the OVERRUN error bit will be set.
How does SPI communication work?
SPI is a full-duplex interface; both master and slave can send data at the same time via the MOSI and MISO lines respectively. During SPI communication, the data is simultaneously transmitted (shifted out serially onto the MOSI/SDO bus) and received (the data on the bus (MISO/SDI) is sampled or read in).
Why is SPI used?
Serial Peripheral Interface (SPI) is an interface bus commonly used to send data between microcontrollers and small peripherals such as shift registers, sensors, and SD cards. It uses separate clock and data lines, along with a select line to choose the device you wish to talk to.
Who is the SPI protocol in LPC2148?
1. SPI Protocol in LPC2148 By- Dnyanesh P. Joshi Instrumentation & Communication Unit 2.
Is there a tutorial for the LPC2148 microcontroller?
This article is a continuation of the series of tutorials on the LPC2148 Microcontroller (ARM7). The aim of this series is to provide easy and practical examples that anyone can understand. In the previous tutorial, we have seen how to set up the PLL and clock for LPC2148 (ARM7).
What is the slave select line in LPC2148?
4. Slave Select line is shown as Input & not Output MOSI is configured as Input when we are using LPC2148 as SPI Slave MOSI is configured as Output, when we are using LPC2148 as SPI Master Instrumentation & Communication Unit 5.
What can I do with LPC2148 ARM7 architecture?
Serial communications interfaces ranging from a USB 2.0 Full-speed device, multiple UARTs, SPI, SSP to I2C-bus and on-chip SRAM of 8 kB up to 40 kB, make these devices very well suited for communication gateways and protocol converters, soft modems, voice recognition, and low-end imaging, providing both large buffer size and high processing power.
