serial to peripheral interface spi®

... out on the Serial Out pin, in this case, 0xAA In order to a sequential read, more clocks need to be generated It is possible to read the entire chip by continuing to provide clocks to the device ... needs to be added (~5ms), if the WIP bit is not being polled This code uses WIP polling FIGURE 4: A page write can be accomplished by continuing to give data bytes to the device without toggling ... register has been set The device is now ready to a write to either the STATUS register or the array Figure shows an example of the Read Status Register command to check for the WEL bit The WEL bit must...

Ngày tải lên: 11/01/2016, 16:35

... needs to be added to ensure the write has finished This code uses WIP polling FIGURE 4: A page write can be accomplished by continuing to send data bytes to the device without toggling CS Up to ... timings are designed to meet the data sheet specs, and a 10 MHz crystal oscillator is used to clock the PIC18F1220 If a different clock is used, the code may need to be modified to avoid violating ... case, is clocked out on the Serial Out (SO) pin In order to perform a sequential read, more clocks need to be generated It is possible to read the entire chip by continuing to clock the device Once...

Ngày tải lên: 11/01/2016, 16:36

... needs to be added to ensure the write has finished This code uses WIP polling FIGURE 4: A page write can be accomplished by continuing to send data bytes to the device without toggling CS Up to ... designed to meet the data sheet specs, and an MHz crystal oscillator is used to clock the dsPIC33F DSC or PIC24F microcontroller If a different clock is used, the code may need to be modified to avoid ... case, is clocked out on the Serial Out (SO) pin In order to perform a sequential read, more clocks need to be generated It is possible to read the entire chip by continuing to clock the device Once...

Ngày tải lên: 11/01/2016, 16:39

... introduction to the humancomputer interface Chapter examines what an interface is, its importance, and its history Chapter reviews the two dominant user interfaces today: the graphical user interface ... Essential Guide to User Interface Design An Introduction to GUI Design Principles and Techniques Third Edition Wilbert O Galitz The Essential Guide to User Interface Design An Introduction to GUI Design ... introduction to the humancomputer interface Chapter examines what an interface is, its importance, and its history Chapter reviews the two dominant user interfaces, the graphical user interface...

Ngày tải lên: 17/03/2014, 22:20

... is a chemoattractant for human CD34+ hematopoietic progenitor cells and provides a new mechanism to explain the mobilization of CD34+ progenitors to peripheral blood J Exp Med 1997, 185:111-120 ... of stem cells to be returned to patients following chemotherapy or bone marrow transplantation Whether or not inflammatory cytokines such as TNF affect the SDF-1/CXCR4 axis in vivo to control OCP ... factor expression by stromal TNF inhibits stromal cell-derived factor expression by ST2ST2 stromal cells ST2 cells, a bone marrow stromal cell line, were treated with TNF or osteoclastogenic cytokines,...

Ngày tải lên: 09/08/2014, 10:23

... muscle -to- capillary interface is an important factor involved in oxygen supply to the muscle [14-19] and may thereby be used as a more sensitive marker for changes in the capillary bed compared to ... fibre perimeter [19] As CFPE-index has been shown to be correlated to precise stereological methods it can be used to assess muscle fibre -to- capillary interface in human studies [15,19] Measuring ... cooled to its freezing point in liquid nitrogen and stored in -80°C until analyses were performed Immunohistochemistry Serial transverse sections, μm thick, were cut at -22°C using a microtome...

Ngày tải lên: 12/08/2014, 11:22

... needs to be added to ensure the write has finished This code uses WIP polling FIGURE 4: A page write can be accomplished by continuing to send data bytes to the device without toggling CS Up to ... timings are designed to meet the data sheet specs, and the internal oscillator is used to clock the P89LPC9XX If a different clock is used, the code may need to be modified to avoid violating timing ... case, is clocked out on the Serial Out (SO) pin In order to perform a sequential read, more clocks need to be generated It is possible to read the entire chip by continuing to clock the device Once...

Ngày tải lên: 11/01/2016, 16:38

... master generates a Stop condition to end the operation In order to read the data byte, the ACKDT bit is first set to indicate that a NO ACK should be sent Then the RCEN bit is set to initiate the ... similar to the byte write operation However, instead of generating a Stop condition after the first data byte has been transmitted, the master continues to send more data bytes, up to page total ... generates a Stop condition This consists of a low -to- high transition of SDA while the clock (SCL) is high Initiating a Stop condition using the I2C1 module FIGURE 4: is similar to initiating...

Ngày tải lên: 11/01/2016, 16:38

... The serial EEPROM automatically increments the internal Address Pointer to the next higher address with receipt of each byte It is important to point out that page write operations are limited to ... READ The byte read operation can be used to read data from the serial EEPROM The MCU transmits the command byte followed by the word address bytes to the serial EEPROM Figure shows an example of ... attempts to write across a physical page boundary, the result is that the data wraps around to the beginning of the current page (overwriting data previously stored there) instead of being written to...

Ngày tải lên: 11/01/2016, 16:49

... The serial EEPROM automatically increments the internal Address Pointer to the next higher address with receipt of each byte It is important to note that page write operations are limited to writing ... to check if the internal write cycle has been initiated The STATUS register can be continuously monitored to look for the end of the write cycle FIGURE 5: DATA POLLING (READ STATUS REGISTER TO ... READ The byte read operation can be used to read data from the serial EEPROM The MCU transmits the command byte followed by the word address bytes to the serial EEPROM Figure shows an example of...

Ngày tải lên: 11/01/2016, 16:49

... register may be read to check if the internal write cycle has been initiated, and it can be continuously monitored to look for the end of the write cycle The MCU selects the serial EEPROM and sends ... 25XX080A serial EEPROM features a 16bytes page Up to full page of data can be written consecutively by using the page write feature It is important to note that page write operations are limited to ... there The page write operation is very similar to the byte write operation The serial EEPROM automatically increments the internal Address Pointer to the next higher address with receipt of each...

Ngày tải lên: 11/01/2016, 17:02

... printf(“\n\r Press R to start the motor”); printf(“\n\r Press S to stop the motor”); printf(“\n\r Press C to rotate motor in clockwise direction”); printf(“\n\r Press A to rotate motor in Anti-clockwise ... - When Key ‘R’ Run the Motor Key ‘S’ Stop the Motor Key ‘C’ Run the Motor in clockwise direction Key ‘A’ Run the Motor in Anti-clockwise direction 78 Serial Interface to PIC ——————————————————————————— ... follows: ● ● ● +3 to +12 V corresponds to an “ON” or 0-state (SPACE) condition −3 to −12 V corresponds to an “OFF” 1-state (MARK) condition +3 to −3 V corresponds to the “dead area” kept to absorb line...

Ngày tải lên: 03/10/2013, 01:20

... oscillator is used to clock the PIC18F1220 If a faster clock is used, the code may need to be modified to ensure all timing specs are met The waveforms provided are shown from CS active to CS ... constant is used in the output subroutines to determine how many bits are required to be output More specifically, it is used by the EWEN and EWDS commands to calculate the number of dummy bits required ... command is given, the DO line of the 93XXXX can be monitored to check if the internal write cycle has been successfully initiated and, if so, to determine when the write cycle is complete The oscilloscope...

Ngày tải lên: 11/01/2016, 16:35

... out on the Serial Out pin, in this case, 0xA5 In order to a sequential read, more clocks need to be generated It is possible to read the entire chip by continuing to provide clocks to the device ... needs to be added (~5ms) if the WIP bit is not being polled This code uses WIP polling FIGURE 3: A page write can be accomplished by continuing to give data bytes to the device without toggling ... code was tested using a 25LC160B serial EEPROM A 10 MHz crystal oscillator is used to clock the PIC18F1220 If a faster clock is used, the code must be modified to ensure all timing specs are met...

Ngày tải lên: 11/01/2016, 16:36

... similar to that of Figure will be shown with the values being programmed by the firmware to also assist in ease of reading To use an SPI port to communicate with Microchip’s Microwire Serial EEPROMs, ... are indicator bits and should be cleared initially The SSP Enable bit (SSPEN) needs to be set in order to enable the SSP module and the Clock Polarity Select bit needs to be cleared to set the ... bits required to access 512 bytes DS01020B-page © 2006 Microchip Technology Inc AN1020 INITIALIZATION TRISC Register In order to configure the MSSP module to work for the Microwire protocol, several...

Ngày tải lên: 11/01/2016, 16:36

... out on the Serial Out pin, in this case, 0xA5 In order to a sequential read, more clocks need to be generated It is possible to read the entire chip by continuing to provide clocks to the device ... needs to be added (~5ms), if the WIP bit is not being polled This code uses WIP polling FIGURE 4: A page write can be accomplished by continuing to give data bytes to the device without toggling ... set for data to be sampled at the end of the output time The Clock Polarity Select bit (CKP) needs to be cleared for Idle state of the clock to be a low level The MSTEN bit needs to be set for...

Ngày tải lên: 11/01/2016, 16:37

... similar to the byte write operation However, instead of generating a Stop condition after the first data byte has been transmitted, the master continues to send more data bytes, up to page total ... the master generates a Stop condition This consists of a low -to- high transition of SDA while the clock (SCL) is high Initiating a Stop condition is done by calling bstop() function FIGURE 4: ... generates a Stop condition to end the operation After the word address has been transmitted, the bstart() function is used to initiate a Restart condition Note that a Restart is very similar to a Start,...

Ngày tải lên: 11/01/2016, 16:44

... memory address has been sent to the serial EEPROM, a new Start condition is generated to switch the MCU from Transmitter to Receiver mode and the serial EEPROM from Receiver to Transmitter mode Before ... Inc AN1113 STOP DATA TRANSFER The MCU generates a Stop condition on the I2C bus to stop data transfer Figure shows a typical scope plot of a byte write operation followed by a Stop condition ... the serial EEPROM which operation to perform To access an I2C serial EEPROM at the start, the MCU writes the device address and the byte address to the I2C serial EEPROM; thus, each access cycle...

Ngày tải lên: 11/01/2016, 16:45

... similar to the byte write operation However, instead of generating a NoMAK after the first data byte has been transmitted, the MCU continues to send more data bytes, up to page total The serial ... modified to generate the correct delays DS01184B-page © 2008 Microchip Technology Inc AN1184 INITIALIZATION Before initiating communication with the serial EEPROM, the MCU must generate a low -to- high ... low -to- high edge on the SCIO to release the serial EEPROM from Power-on Reset (POR) Because bus idle is high, the MCU must create a high-low-high pulse on the SCIO Once the serial EEPROM has been released...

Ngày tải lên: 11/01/2016, 16:48

... generate a low -to- high edge on the SCIO to release the serial EEPROM from Power-on Reset (POR) Because bus idle is high, the MCU must create a high-low-high pulse on the SCIO Once the serial EEPROM ... has been performed, a page write operation can be executed to write data to the array The serial EEPROM features a 16-byte page, so up to 16 bytes of data can be written within a single operation ... The serial EEPROM allows data to be read from the array in a random access manner Reading data from the array is very similar to the write operation, except that the Read is not limited to a...

Ngày tải lên: 11/01/2016, 16:48