7

ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P [DATASHEET SUMMARY]

Atmel-8272FS-AVR--07/2014

timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O

modules except Asynchronous Timer and ADC, to minimize switching noise during ADC conversions. In

Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows

very fast start-up combined with low power consumption. In Extended Standby mode, both the main Oscillator

and the Asynchronous Timer continue to run.

AVR microcontrollers. The patented charge-transfer signal acquisition offers robust sensing and includes fully

unambiguous detection of key events. The easy-to-use QTouch Suite toolchain allows you to explore, develop

and debug your own touch applications.

The device is manufactured using Atmel’s high-density nonvolatile memory technology. The On-chip ISP Flash

allows the program memory to be reprogrammed in-system through an SPI serial interface, by a conventional

nonvolatile memory programmer, or by an On-chip Boot program running on the AVR core. The boot program

can use any interface to download the application program in the application Flash memory. Software in the

Boot Flash section will continue to run while the Application Flash section is updated, providing true Read-

While-Write operation. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a

monolithic chip, the Atmel ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P is a powerful

microcontroller that provides a highly flexible and cost effective solution to many embedded control applications.

The ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P is supported with a full suite of program and

system development tools including: C compilers, macro assemblers, program debugger/simulators, in-circuit

emulators, and evaluation kits.

2.2

Comparison between ATmega164A, ATmega164PA, ATmega324A, ATmega324PA,

ATmega644A, ATmega644PA, ATmega1284 and ATmega1284P

2.3

Pin Descriptions11

2.3.1

VC

Digital supply voltage.

2.3.2

GND

Ground.

Table 2-1.

Differences between ATmega164A, ATmega164PA, ATmega324A, ATmega324PA, ATmega644A,

ATmega644PA, ATmega1284 and ATmega1284P.

Device

Flash

EEPROM

RAM

Units

ATmega164A

16K

512

1K

bytes

ATmega164PA

16K

512

1K

ATmega324A

32K

1K

2K

ATmega324PA

32K

1K

2K

ATmega644A

64K

2K

4K

ATmega644PA

64K

2K

4K

ATmega1284

128K

4K

16K

ATmega1284P

128K

4K

16K