Details

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BUY ATMEGA1284P-AU https://www.utsource.net/itm/p/11249125.html

Parameter	Symbol	Min	Typical	Max	Unit	Description
Supply Voltage	VCC	1.8	-	5.5	V	Operating voltage range
Supply Current (Active)	ICC(ACTIVE)	-	15	-	mA	Active mode supply current at 5V, 1 MHz
Supply Current (Power Down)	ICC(PD)	-	0.1	-	μA	Power-down mode supply current at 5V
Operating Temperature	Toperating	-40	-	85	°C	Operating temperature range
Clock Frequency	fosc	0	-	20	MHz	Maximum clock frequency
Flash Memory		-	128	-	KB	Program memory size
EEPROM		-	4	-	KB	EEPROM size
SRAM		-	16	-	KB	SRAM size
I/O Pins		-	32	-		Number of I/O pins
ADC Channels		-	8	-		Number of analog-to-digital converter channels
ADC Resolution		-	10-bit	-	bits	Analog-to-digital converter resolution
DAC Channels		-	0	-		Number of digital-to-analog converter channels
Timer/Counters		-	3	-		Number of timer/counters
UARTs		-	2	-		Number of universal asynchronous receiver-transmitters
SPI Interfaces		-	1	-		Number of serial peripheral interfaces
TWI/I2C Interfaces		-	1	-		Number of two-wire interface/I2C interfaces
Watchdog Timer		-	1	-		Number of watchdog timers
External Interrupts		-	6	-		Number of external interrupt sources
Package Type		-	TQFP-44	-		Package type

Instructions for Using ATMEGA1284P-AU

1. Power Supply:

   • Ensure the supply voltage (VCC) is within the range of 1.8V to 5.5V.
   • Connect the VCC pin to the power source and GND pin to ground.

2. Clock Configuration:

   • The device can operate with an internal RC oscillator or an external crystal/clock source.
   • For external crystal, connect the crystal between the XTAL1 and XTAL2 pins and add appropriate load capacitors.

3. Programming:

   • Use an ISP (In-System Programming) programmer to program the flash memory.
   • Connect the programmer to the ISP header (MISO, MOSI, SCK, RESET, VCC, GND).

4. I/O Configuration:

   • Configure I/O pins as input or output using the DDRx (Data Direction Register) registers.
   • Set the initial state of the pins using the PORTx registers.

5. ADC Usage:

   • Initialize the ADC by setting the appropriate bits in the ADMUX and ADCSRA registers.
   • Start a conversion by setting the ADSC bit in the ADCSRA register.
   • Read the result from the ADCL and ADCH registers.

6. Timer/Counter Usage:

   • Configure the timer/counter by setting the appropriate bits in the TCCRnA, TCCRnB, and TCNTn registers.
   • Use the OCRnA and OCRnB registers for compare match operations.
   • Enable interrupts if needed by setting the corresponding bits in the TIMSKn register.

7. UART Configuration:

   • Set the baud rate using the UBRRnH and UBRRnL registers.
   • Configure the data frame format (8-bit, parity, stop bits) using the UCSRnC register.
   • Enable the transmitter and receiver using the UCSRnB register.
   • Send and receive data using the UDRn register.

8. SPI Configuration:

   • Set the SPI mode and data order using the SPCR and SPSR registers.
   • Enable the SPI interface by setting the SPE bit in the SPCR register.
   • Transfer data using the SPDR register.

9. TWI/I2C Configuration:

   • Set the TWI prescaler and bit rate using the TWBR and TWSR registers.
   • Enable the TWI interface by setting the TWEN bit in the TWCR register.
   • Initiate read/write operations using the TWCR register and monitor the status using the TWSR register.

10. Watchdog Timer:

    • Enable the watchdog timer by setting the WDE bit in the WDTCSR register.
    • Set the watchdog timeout period using the WDP[3:0] bits in the WDTCSR register.
    • Reset the watchdog timer by writing to the WDTCSR register.

11. External Interrupts:

    • Enable external interrupts by setting the appropriate bits in the EIMSK register.
    • Set the trigger level (low level, any logical change, falling edge, rising edge) using the EICRA register.
    • Write interrupt service routines (ISRs) to handle the interrupts.

12. Power Management:

    • Use sleep modes to reduce power consumption by setting the appropriate bits in the MCUCR and SMCR registers.
    • Wake up the device from sleep mode using external interrupts or the watchdog timer.

13. Reset Conditions:

    • The device can be reset by applying a low signal to the RESET pin for a minimum duration.
    • Ensure the reset circuitry is properly designed to avoid unintentional resets.

For detailed information, refer to the ATMEGA1284P-AU datasheet and application notes provided by Microchip Technology.

(For reference only)