Microcontrollori Periferiche Interne

Transcript

1 Microcontrollori Periferiche Interne 2013/2014 1

2 Microcontrollori Periferiche Interne Peripherals registers uc CORE Peripheric Device 2013/2014 2

3 Microcontrollori Periferiche Interne Peripherals registers uc CORE Peripheric Device Data Configuration Status 2013/2014 3

4 Microcontrollori Periferiche Interne 2013/2014 4

5 Microcontrollori Analogical Device Comparator Monitoring of external analog signals. Internally reference voltage generator Externally reference voltage applicable REF OUT 2013/2014 5

6 Microcontrollori Analogical Device ADC Risoluzione Indica il numero di bit di uscita: 10, 12, 16, 24 Bit ADC La variazione minima che si riesce a discriminare è legata alla risoluzione Accuratezza Livello di conformità fra dato convertito e dato analogico Velocità di conversione Massimo data rate espresso in sample per second (sps) V LSB = V 2 ref n LSB= Least Significant Bit 2013/2014 6

7 Microcontrollori Analogical Device ADC Successive Approximation (SAR) Sigma Delta (SD or Σ) Slope or Dual Slope Pipeline Flash 2013/2014 7

8 Microcontrollori Analogical Device ADC 2013/2014 8

9 Microcontrollori Analogical Device ADC ADC S&H Multiplexer PGA 2013/2014 9

10 Microcontrollori Analogical Device ADC Single Ended Input 2013/

11 Microcontrollori Analogical Device ADC Differential Input 2013/

12 Microcontrollori Analogical Device ADC Differential Input V cm = V p +V n 2 - Vn + + Vp Vo 2013/

13 Microcontrollori Analogical Device Single Conversion Continuous Conversion 2013/

14 Microcontrollori Comm. Interface SPI MASTER SLAVE 2013/

15 Microcontrollori Comm. Interface SPI 2013/

16 Microcontrollori Comm. Interface SPI 2013/

17 Microcontrollori Comm. Interface SPI POLARITY!!!!!! 2013/

18 Microcontrollori Comm. Interface SPI Code WRITE TX RX CLK TX ADDR DUMMY CLOCK ADDR READ DATA DUMMY CLOCK DUMMY RX CLK DUMMY CLOCK τ DATA CLOCK 2013/

19 I2C 2013/

20 I2C 2013/

21 I2C Bit transfer 2013/

22 I2C Start Stop 2013/

23 I2C Data Transfer 2013/

24 I2C Arbitration 2013/

25 I2C Trasmissione 2013/

26 I2C Rp e C ( L D) C L α ; 2013/

27 I2C HS mode 2013/

28 I2C HS Mode 2013/

29 I2C HS Mode Bridge 2013/

30 I2C Velocità di comunicazione 2013/

31 RS232 Universal asynchronous receiver/transmitter Transmit bits in a single channel simplex (one way) half-duplex (one direction at a time) full-duplex (two way) A sequence of bits packet or character ASCII code 7 bits for 128 characters (alphabet, numerical, and control) fixed length or variable length Start, stop, and parity bits 2013/

32 RS232 EIA RS232 Connection and signal characteristics Data terminal equipment and data communication equipment Logic '1' (marking) -3v to -25v with respect to signal ground Logic 0 (spacing) +3v to +25v Not assigned between -3v and +3v (a transition region) 2013/

33 RS /

34 UART Interface RS /

35 UART - Interface 2013/

36 UART - Interface 2013/

37 UART - Interface 2013/

38 UART Interface 2 Wire (Asincrono) Nessuna informazione di sincronismo Il sincronismo viene ricavato direttamente dalla linea dati Possibilità di errori causati dallo sfasamento fra trasmettitore E ricevitore 2013/

39 UART Interface 4 Wire (sincronizzazione) 2013/

40 UART Interface RS /