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Glossary
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SPI
- Serial Peripheral Interface
- The Serial Peripheral Interface (SPI) allows a synchronous high-speed data transfer between the
ATmega644P and peripheral devices or between several AVR devices.
USART can also be used in Master SPI mode
USART / UART
- the Universal Synchronous and Asynchronous serial Receiver and Transmitter (USART) is a
highly flexible serial communication device.
ADC - Analog-to-digital Converter
- The ADC converts an analog input voltage to a 10-bit digital value through successive approximation.
JTAG
- JTAG stands for IEEE 1149.1 standard that was developed by the Joint Test Action Group.
With the JTAG-protocol the programming, debugging and testing of processors and FPGAs (Field Programmable Gate Array)
is directly realisable in the circuit.
XMLHttpRequest-Object
- API for the data transfer with the HTTP protocol
- the use of different query methods (GET, POST, HEAD, PUT)
- basic module of the AJAX-technique to retrieve data dynamically without loading the web site again
HTTP - Hypertext Transfer Protocol
- protocol for the transfer of data over a network
- basically web sites are the main focus
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