ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 16

• Manufacturer Part Number: ATmega1284PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega1284PR231

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -101
• Receive Current Consumption (ma): 13.2
• Transmit Current Consumption (ma): 14.4
• Link Budget (dbm): 104

6. Microcontroller Interface
8111C–MCU Wireless–09/09
This section describes the AT86RF231 to microcontroller interface. The interface comprises a
slave SPI and additional control signals; see
are described below.
Figure 6-1.
Microcontrollers with a master SPI such as Atmel's AVR family interface directly to the
AT86RF231. The SPI is used for register, Frame Buffer, SRAM and AES access. The additional
control signals are connected to the GPIO/IRQ interface of the microcontroller.
Table 6-1 on page 16
Table 6-1.
Signal
/SEL
MOSI
MISO
SCLK
CLKM
IRQ
Microcontroller to AT86RF231 Interface
Signal Description of Microcontroller Interface
Microcontroller
Description
SPI select signal, active low
SPI data (master output slave input) signal
SPI data (master input slave output) signal
SPI clock signal
Clock output, refer to
Interrupt request signal, further used as:
GPIO1/CLK
GPIO2/IRQ
introduces the radio transceiver I/O signals and their functionality.
-microcontroller clock source
-high precision timing reference
-MAC timer reference
-Frame Buffer Empty Indicator, refer to
GPIO3
GPIO4
GPIO5
SCLK
MOSI
MISO
/SEL
Section 9.6.4
SLP_TR
Figure 6-1 on page
CLKM
SCLK
MOSI
MISO
/RST
DIG2
/SEL
SPI
IRQ
usable as:
Section 11.7
AT86RF231
MOSI
MISO
SCLK
CLKM
IRQ
SLP_TR
/RST
/SEL
DIG2
16. The SPI timing and protocol
AT86RF231
16