ATMEGA256RZAV-8MU Atmel, ATMEGA256RZAV-8MU Datasheet - Page 5

• Manufacturer Part Number: ATMEGA256RZAV-8MU
• Description: MCU ATMEGA2561/AT86RF230 64-QFN
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA256RZAV-8MU

• Frequency: 2.4GHz
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: ISM, ZigBee™
• Power - Output: 3dBm
• Sensitivity: -101dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 15.5mA
• Current - Transmitting: 16.5mA
• Data Interface: PCB, Surface Mount
• Memory Size: 256kB Flash, 4kB EEPROM, 8kB RAM
• Antenna Connector: PCB, Surface Mount
• Package / Case: 64-QFN
• Wireless Frequency: 2.4 GHz
• Interface Type: JTAG, SPI
• Output Power: 3 dBm
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Data Rate - Maximum: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: ATmega256

4.2 Analog and RF Pins
5131E-MCU Wireless-02/09
AVDD, DVDD
AVDD and DVDD are outputs of the internal 1.8V voltage regulators. The voltage
regulators are controlled independently by the radio transceivers state machine and are
activated depending on the current radio transceiver state. The voltage regulators can
be configured for external supply. For details refer to section 9.4.
AVSS, DVSS
AVSS and DVSS are analog and digital ground pins respectively.
The analog and digital power domains should be separated on the PCB, for further
details see application note AVR2005 "Design Considerations for the AT86RF230".
RFP, RFN
A differential RF port (RFP/RFN) provides common-mode rejection to suppress the
switching noise of the internal digital signal processing blocks. At the board-level, the
differential RF layout ensures high receiver sensitivity by rejecting any spurious
interspersions originating from other digital ICs such as a microcontroller.
The RF port is designed for a 100Ω differential load. A DC path between the RF pins is
allowed. A DC path to ground or supply voltage is not allowed. Therefore, when
connecting a RF-load providing a DC path to the power supply or to ground, capacitive
coupling is required as indicated in Table 4-2.
A simplified schematic of the RF front end is shown in Figure 4-1.
Figure 4-1. Simplified RF Front-End Schematic
RF port DC values depend on the operating mode. In TRX_OFF state (see section
7.1.2), when the analog front end is disabled, the RF pins are pulled to ground,
preventing a floating voltage.
RFN
RFP
PCB
AT86RF230
M0
0.9V
RXTX
CM
Feedback
LNA
PA
RX
TX
AT86RF230
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