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임베디드 통신 프로토콜(UART, SPI, I2C)
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Taeyeop Kim
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임베디드 환경에서 사용되는 통신 프로토콜 3가지를 설명한다. ktim610@gmail.com
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In the case of class A amplifier, we have observed that the transistor conducts for the full cycle of the input signal i.e. the conduction angle is 180◦. Although the transistor conducts for the full cycle of the input signal, the power conversion efficiency is poor in class A amplifier. In addition to that, a great deal of distortion is introduced by the nonlinearity in the dynamic transfer characteristic of the transistor. The power conversion efficiency can be improved by biasing the transistor at cut off point on VCE axis and a great deal of the distortion due to nonlinearity in dynamic transfer characteristic may be eliminated by the push-pull configuration of the transistor as discussed in next section
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임베디드 통신 프로토콜(UART, SPI, I2C)
1.
시리얼 통신
2.
Parallel(병렬) vs Serial(직렬)
3.
Synchronous(동기식) Asynchronous(비동기식) Serial SPI(1:N) I2C(N:N) UART(1:1)
4.
UART (Universal Asynchronous Receiver/Transmitter) ●
Data bits - 전송 데이터 ● Synchronization bits - 패킷의 시작과 끝 ● Parity bits - 데이터 손실 검출 ● Baud rate - 1 bit가 유지되는 시간
5.
Framing
6.
Wiring
7.
● Clock -
동기화 클럭 ● MOSI(Master out / Slave In) - 송신 ● MISO(Master In / Slave Out) - 수신 ● SS(Slave Select) - 장치 선택 SPI (Serial Peripheral Interface)
8.
SPI (Serial Peripheral Interface) 데이터
송신 데이터 수신 장치 선택
9.
I2C (Inter - Integrated
Circuit) ● SCL - 동기화 클럭 ● SDA - 데이터 라인
10.
I2C (Inter - Integrated
Circuit)
11.
I2C (Inter - Integrated
Circuit)
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