ATmega128RFA1 Atmel Corporation, ATmega128RFA1 Datasheet - Page 7

• Manufacturer Part Number: ATmega128RFA1
• Manufacturer: Atmel Corporation

Specifications of ATmega128RFA1

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 16 MHz
• Max I/o Pins: 38
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 6
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3.5
• Receiver Sensitivity (dbm): -100
• Receive Current Consumption (ma): 16.6
• Transmit Current Consumption (ma): 18.6
• Link Budget (dbm): 103.5

3.4 Compatibility to ATmega1281/2561
3.4.1 Port A and Port C
3.4.2 External Memory Interface
3.4.3 High Voltage Programming Mode
3.4.4 AVR Oscillators and External Clock
3.4.5 Analog Frontend
8266CS-MCU Wireless-08/11
resistors can be enabled (in Reset all GPIO are configured as input and the pull-up
resistors are still not enabled).
Bi-directional I/O pins shall not be connected to ground or power supply directly.
The digital input pins TST and CLKI must be connected. If unused pin TST can be
connected to AVSS while CLKI should be connected to DVSS.
Output pins are driven by the device and do not float. Power supply pins respective
ground supply pins are connected together internally.
XTAL1 and XTAL2 shall never be forced to supply voltage at the same time.
The basic AVR feature set of the ATmega128RFA1 is derived from the
ATmega1281/2561. Address locations and names of the implemented modules and
registers are unchanged as long as it fits the target application of a very small and
power efficient radio system. In addition, several new features were added.
Backward compatibility of the ATmega128RFA1 to the ATmega1281/2561 is provided
in most cases. However some incompatibilities between the microcontrollers exist.
Port A and Port C are not implemented. The associated registers are available but will
not provide any port control. Remaining ports are kept at their original address location
to not require changes of existing software packages.
The alternate pin function “External Memory interface” using Port A and Port C is not
implemented due to the missing ports.
The large internal data memory (SRAM) does not require an external memory and the
associated parallel interface. It keeps the system radiation (EMC) at a very small level
to provide very high sensitivity at the antenna input.
Alternate pin function BS2 (high voltage programming) of pin PA0 is mapped to a
different pin. Entering the parallel programming mode is controlled by the TST pin.
The AVR microcontroller can utilize the high performance crystal oscillator of the
2.4GHz transceiver connected to the pins XTAL1 and XTAL2. An external clock can be
applied to the microcontroller using the clock input CLKI.
The ATmega128RFA1 has a new A/D converter. Software compatibility is basically
assured. Nevertheless to benefit from the higher conversion speeds and the better
performance some changes are required.
ATmega128RFA1
7