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Teeme ise 2012 Elektroonika II.

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Presentation on theme: "Teeme ise 2012 Elektroonika II."— Presentation transcript:

1 Teeme ise 2012 Elektroonika II

2 AVR 28 jalga 23 I/O 6-ch 10B ADC 4.5-5.5V DC 16MHz | 16 MIPS 8Kb FLASH
512B EEPROM 1Kb SRAM jpm

3 AVR CPU Core Harvard arhitektuur
Programmi mälu: In-System Reprogrammable Flash memory Under pure von Neumann architecture the CPU can be either reading an instruction or reading/writing data from/to the memory. Both cannot occur at the same time since the instructions and data use the same bus system. In a computer using the Harvard architecture, the CPU can both read an instruction and perform a data memory access at the same time, even without a cache. While one instruction is being executed, the next instruc-tion is pre-fetched from the Program memory. This concept enables instructions to be executed in every clock cycle.

4 AVR System clock Sisemine 8MHz R/C ossillaator Väline 0-16MHz kristall

5 AVR I/O Lüli koodi ja reaalse maailma vahel
Täielikult konfigureeritav vastavalt „disaineri“ vajadustele (max 40mA)

6 Timer 16-bit resolutsioon 2 OC units Pulse Width Modulator (PWM)

7 Fast PWM mode BOTTOM->TOP loendur 16-bit Triger OCRn1 korral

8 ADC 10-bit resolutsioon 0-Vcc Pingevahemik Automaat - / üksik mõõtmine

9 Serial Programming (ISP)
Eelised: Saab programmeerida juba joodetud kiipe Võimalus lihtalt programmeerida arendusel olevaid seadmeid Puudused: Aeglane suurte koodide puhul Kasutab AVR’i tööks vajaminevaid I/O viike Puudub võimalus „päästa“ valesti programmeeritud kiipe JTAG ja Parallel programming tutvustada

10 Korpus

11 Hädavajalik Xtal pins appera on klick


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