ATXMEGA256A3U-AU Detailed explanation of pin function specifications and circuit principle instructions

The ATXMEGA256A3U-AU is a microcontroller produced by Microchip Technology (formerly Atmel). It belongs to the Atmel (Microchip) XMEGA family and is part of their 8/16-bit microcontroller series. This specific model is an AVR-based device that has 256KB of flash memory and 32KB of SRAM.

Package Details

The "ATXMEGA256A3U-AU" part is in an LQFP (Low-profile Quad Flat Package) with 100 pins. It is often used in applications requiring high performance and low Power , such as industrial, automotive, and consumer electronics.

Pinout and Pin Function List

Here is the detailed pinout for the ATXMEGA256A3U-AU:

Pin Number Pin Name Pin Function Description 1 VCC Power Supply Voltage (3.0V to 3.6V) 2 GND Ground (0V) 3 PA0 I/O Port A, Pin 0 4 PA1 I/O Port A, Pin 1 5 PA2 I/O Port A, Pin 2 6 PA3 I/O Port A, Pin 3 7 PA4 I/O Port A, Pin 4 8 PA5 I/O Port A, Pin 5 9 PA6 I/O Port A, Pin 6 10 PA7 I/O Port A, Pin 7 11 PB0 I/O Port B, Pin 0 12 PB1 I/O Port B, Pin 1 13 PB2 I/O Port B, Pin 2 14 PB3 I/O Port B, Pin 3 15 PB4 I/O Port B, Pin 4 16 PB5 I/O Port B, Pin 5 17 PB6 I/O Port B, Pin 6 18 PB7 I/O Port B, Pin 7 19 PC0 I/O Port C, Pin 0 20 PC1 I/O Port C, Pin 1 21 PC2 I/O Port C, Pin 2 22 PC3 I/O Port C, Pin 3 23 PC4 I/O Port C, Pin 4 24 PC5 I/O Port C, Pin 5 25 PC6 I/O Port C, Pin 6 26 PC7 I/O Port C, Pin 7 27 PD0 I/O Port D, Pin 0 28 PD1 I/O Port D, Pin 1 29 PD2 I/O Port D, Pin 2 30 PD3 I/O Port D, Pin 3 31 PD4 I/O Port D, Pin 4 32 PD5 I/O Port D, Pin 5 33 PD6 I/O Port D, Pin 6 34 PD7 I/O Port D, Pin 7 35 PE0 I/O Port E, Pin 0 36 PE1 I/O Port E, Pin 1 37 PE2 I/O Port E, Pin 2 38 PE3 I/O Port E, Pin 3 39 PE4 I/O Port E, Pin 4 40 PE5 I/O Port E, Pin 5 41 PE6 I/O Port E, Pin 6 42 PE7 I/O Port E, Pin 7 43 PF0 I/O Port F, Pin 0 44 PF1 I/O Port F, Pin 1 45 PF2 I/O Port F, Pin 2 46 PF3 I/O Port F, Pin 3 47 PF4 I/O Port F, Pin 4 48 PF5 I/O Port F, Pin 5 49 PF6 I/O Port F, Pin 6 50 PF7 I/O Port F, Pin 7 51 PG0 I/O Port G, Pin 0 52 PG1 I/O Port G, Pin 1 53 PG2 I/O Port G, Pin 2 54 PG3 I/O Port G, Pin 3 55 PG4 I/O Port G, Pin 4 56 PG5 I/O Port G, Pin 5 57 PG6 I/O Port G, Pin 6 58 PG7 I/O Port G, Pin 7 59 VREF Reference Voltage 60 AREF Analog Reference 61 RESET Reset Pin 62 TDI JTAG Test Data In 63 TDO JTAG Test Data Out 64 TMS JTAG Test Mode Select 65 TCK JTAG Test Clock 66 NMI Non-Maskable Interrupt 67 SCK SPI Clock 68 MOSI SPI Master Out Slave In 69 MISO SPI Master In Slave Out 70 SS SPI Slave Select 71 RXD UART Receive Data 72 TXD UART Transmit Data 73 XCK UART External Clock 74 AIN0 Analog Input 0 75 AIN1 Analog Input 1 76 AIN2 Analog Input 2 77 AIN3 Analog Input 3 78 AIN4 Analog Input 4 79 AIN5 Analog Input 5 80 AIN6 Analog Input 6 81 AIN7 Analog Input 7 82 SCL I2C Clock 83 SDA I2C Data 84 ICP0 Input Capture 0 85 ICP1 Input Capture 1 86 ICP2 Input Capture 2 87 ICP3 Input Capture 3 88 OC0A Timer/Counter 0 Output Compare A 89 OC0B Timer/Counter 0 Output Compare B 90 OC1A Timer/Counter 1 Output Compare A 91 OC1B Timer/Counter 1 Output Compare B 92 OC2A Timer/Counter 2 Output Compare A 93 OC2B Timer/Counter 2 Output Compare B 94 OC3A Timer/Counter 3 Output Compare A 95 OC3B Timer/Counter 3 Output Compare B 96 OC4A Timer/Counter 4 Output Compare A 97 OC4B Timer/Counter 4 Output Compare B 98 OC5A Timer/Counter 5 Output Compare A 99 OC5B Timer/Counter 5 Output Compare B 100 GND Ground

20 FAQ

Q1: What is the supply voltage range for the ATXMEGA256A3U-AU? A1: The supply voltage for the ATXMEGA256A3U-AU ranges from 3.0V to 3.6V.

Q2: What is the maximum operating temperature for the ATXMEGA256A3U-AU? A2: The maximum operating temperature is 85°C.

Q3: How many I/O pins are there in the ATXMEGA256A3U-AU? A3: There are 100 pins in the ATXMEGA256A3U-AU, and many are configured as I/O ports.

Q4: Does the ATXMEGA256A3U-AU support JTAG? A4: Yes, the ATXMEGA256A3U-AU supports JTAG through the TDI, TDO, TMS, and TCK pins.

Q5: What is the main advantage of using the XMEGA architecture? A5: The XMEGA architecture offers high performance, low power consumption, and rich peripheral integration, including multiple timers, communication interface s, and ADCs.

Q6: Can the ATXMEGA256A3U-AU be used in automotive applications? A6: Yes, the ATXMEGA256A3U-AU is suitable for automotive applications due to its high reliability, robustness, and temperature tolerance.

Q7: How do you reset the ATXMEGA256A3U-AU? A7: The ATXMEGA256A3U-AU can be reset using the RESET pin.

Q8: Does the ATXMEGA256A3U-AU support UART? A8: Yes, the ATXMEGA256A3U-AU has UART functionality through the RXD and TXD pins.

Q9: What types of communication interfaces does the ATXMEGA256A3U-AU support? A9: The ATXMEGA256A3U-AU supports SPI, UART, and I2C communication interfaces.

Q10: What is the clock source for the ATXMEGA256A3U-AU? A10: The ATXMEGA256A3U-AU can use an internal or external clock source, and it has a high-frequency crystal oscillator.

Q11: How many analog input pins are available on the ATXMEGA256A3U-AU? A11: The ATXMEGA256A3U-AU has 8 analog input pins (AIN0 to AIN7).

Q12: What is the function of the VREF pin? A12: The VREF pin provides a reference voltage for the ADC.

Q13: Can the ATXMEGA256A3U-AU perform PWM? A13: Yes, the ATXMEGA256A3U-AU can perform PWM using its output compare pins (OCxA, OCxB).

Q14: Does the ATXMEGA256A3U-AU support external interrupts? A14: Yes, the ATXMEGA256A3U-AU supports external interrupts on several pins.

Q15: How much flash memory is available on the ATXMEGA256A3U-AU? A15: The ATXMEGA256A3U-AU has 256KB of flash memory.

Q16: Can the ATXMEGA256A3U-AU be programmed in-circuit? A16: Yes, the ATXMEGA256A3U-AU supports in-circuit programming via ISP (In-System Programming) and JTAG.

Q17: How many timers are available on the ATXMEGA256A3U-AU? A17: The ATXMEGA256A3U-AU features multiple timers, including 16-bit and 8-bit timers.

Q18: What is the ADC resolution on the ATXMEGA256A3U-AU? A18: The ATXMEGA256A3U-AU has a 12-bit ADC resolution.

Q19: Can the ATXMEGA256A3U-AU be used for low-power applications? A19: Yes, the ATXMEGA256A3U-AU features various low-power modes, including sleep and idle modes.

Q20: What is the maximum clock frequency for the ATXMEGA256A3U-AU? A20: The ATXMEGA256A3U-AU can operate up to 32 MHz.