Details

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BUY ATXMEGA64A3U-AU https://www.utsource.net/itm/p/9456998.html
IC MCU 8/16BIT 64KB FLASH 64TQFP

Parameter	Description	Value
Package	Type of package	QFN-64 (10x10)
Operating Voltage	Range of operating voltages	1.62V to 3.6V
Clock Speed	Maximum clock speed	32 MHz
Flash Memory	Size of flash memory	64 KB
SRAM	Size of SRAM	4 KB
EEPROM	Size of EEPROM	2 KB
Analog-to-Digital Converters (ADCs)	Number of ADCs and resolution	2 x 12-bit
Digital-to-Analog Converters (DACs)	Number of DACs and resolution	1 x 8-bit
Timers/Counters	Number and type of timers/counters	3 x 16-bit, 2 x 8-bit
Serial Communication Interfaces (SCI)	Number of SCI interfaces	2
Serial Peripheral Interface (SPI)	Number of SPI interfaces	2
I2C Interface	Number of I2C interfaces	2
USB Interface	USB interface support	Full-Speed USB 2.0
Temperature Range	Operating temperature range	-40°C to 85°C
Power Consumption	Typical power consumption at 32 MHz, 3.3V	9 mA
Low-Power Modes	Available low-power modes	Idle, Power-down, Standby
GPIO Pins	Number of general-purpose input/output pins	56
Capacitive Touch Channels	Number of capacitive touch channels	12
Program Memory Protection	Support for program memory protection	Yes
Watchdog Timer	Availability of watchdog timer	Yes
Brown-out Detection	Support for brown-out detection	Yes

Instructions for Use

1. Power Supply:

   • Ensure the supply voltage is within the specified range (1.62V to 3.6V).
   • Connect a decoupling capacitor (e.g., 100nF) close to the VCC and GND pins to stabilize the power supply.

2. Clock Configuration:

   • The device supports both internal and external clock sources. For external clocks, connect the clock source to the appropriate pins (XTAL1 and XTAL2).
   • Use the fuses to configure the clock source and prescaler settings.

3. Programming:

   • Use an ISP programmer or a JTAG debugger to program the device.
   • The programming interface can be selected via the fuse settings.

4. Serial Communication:

   • Configure the SCI, SPI, and I2C interfaces using the appropriate registers.
   • Set the baud rate, data format, and other parameters as needed.

5. USB Configuration:

   • The USB interface requires external components such as a pull-up resistor on the D+ line.
   • Use the USB library provided by Atmel to handle USB communication.

6. Low-Power Modes:

   • Enter low-power modes by setting the appropriate bits in the sleep control register.
   • Use the watchdog timer to wake up from low-power modes if necessary.

7. GPIO Configuration:

   • Configure GPIO pins as inputs or outputs using the PORTx.DIR register.
   • Set the pin levels using the PORTx.OUT register and read the pin states using the PORTx.IN register.

8. Analog-to-Digital Conversion:

   • Configure the ADC using the ADCx.CTRL and ADCx.MUXPOS registers.
   • Start a conversion by writing to the ADCx.COMMAND register and read the result from the ADCx.RES register.

9. Digital-to-Analog Conversion:

   • Configure the DAC using the DACx.CTRL and DACx.DATA registers.
   • Set the output level by writing to the DACx.DATA register.

10. Interrupts:

    • Enable interrupts by setting the appropriate bits in the interrupt control registers.
    • Write interrupt service routines (ISRs) to handle specific events.

11. Capacitive Touch:

    • Use the QTouch library provided by Atmel to configure and manage capacitive touch channels.
    • Calibrate the touch sensors during initialization and handle touch events in the main loop or ISRs.

12. Brown-out Detection:

    • Enable brown-out detection by setting the appropriate fuse bits.
    • The device will reset if the supply voltage drops below the threshold.

For detailed information and specific register configurations, refer to the ATXMEGA64A3U-AU datasheet and application notes.

(For reference only)