ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 6

• 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

1.2.3
1.2.4
Table 1-2.
8111C–MCU Wireless–09/09
Pin
RFP/RFN
XTAL1/ XTAL2
DVDD
AVDD
Crystal Oscillator Pins
Analog Pin Summary
Analog Pin Behavior - DC values
Values and Conditions
V
V
V
V
C
V
V
V
SLEEP, RESET, and TRX_OFF)
V
DC
DC
DC
DC
PAR
DC
DC
DC
DC
= 0.9V (BUSY_TX)
= 20 mV (receive states)
= 0 mV (otherwise)
= 0.9V at both pins
= 1.8V (all states, except SLEEP)
= 0 mV (otherwise)
= 1.8V (all states, except P_ON,
= 0 mV (otherwise)
= 3 pF
The RF port DC values depend on the operating state, refer to
page
“TRX_OFF - Clock State” on page
voltage.
In transmit mode, a control loop provides a common-mode voltage of 0.9V. Transistor M0 is off,
allowing the PA to set the common-mode voltage. The common-mode capacitance at each pin
to ground shall be < 30 pF to ensure the stability of this common-mode feedback loop.
In receive mode, the RF port provides a low-impedance path to ground when transistor M0, see
Figure 1-2 on page
across the on-chip inductor can be measured at the RF pins.
XTAL1, XTAL2
The pin XTAL1 is the input of the reference oscillator amplifier (XOSC), XTAL2 is the output. A
detailed description of the crystal oscillator setup and the related XTAL1/XTAL2 pin configura-
tion can be found in
When using an external clock reference signal, XTAL1 shall be used as input pin.
For further details, refer to
33. In TRX_OFF state, when the analog front-end is disabled (see
Section 9.6 “Crystal Oscillator (XOSC)” on page
5, pulls the inductor center tap to ground. A DC voltage drop of 20 mV
Section 9.6.3 “External Reference Frequency Setup” on page
Comments
DC level at pins RFP/RFN for various transceiver states
AC coupling is required if an antenna with a DC path to ground is used.
Serial capacitance and capacitance of each pin to ground must be < 30 pF.
DC level at pins XTAL1/XTAL2 for various transceiver states
Parasitic capacitance (C
load capacitance to the crystal.
DC level at pin DVDD for various transceiver states
Supply pins (voltage regulator output) for the digital 1.8V voltage domain,
recommended bypass capacitor 1 µF.
DC level at pin AVDD for various transceiver states
Supply pin (voltage regulator output) for the analog 1.8V voltage domain,
recommended bypass capacitor 1 µF.
35), the RF pins are pulled to ground, preventing a floating
PAR
) of the pins must be considered as additional
Section 7. “Operating Modes” on
116.
AT86RF231
Section 7.1.2.3
117.
6