ATMEGA256RZAV-8AU Atmel, ATMEGA256RZAV-8AU Datasheet - Page 87

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

Specifications of ATMEGA256RZAV-8AU

• 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-TQFP
• Wireless Frequency: 2.4 GHz
• Interface Type: JTAG, SPI
• Output Power: 3 dBm
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN 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

Appendix A - Continuous Transmission Test Mode
A.1 - Overview
A.2 - Configuration
5131E-MCU Wireless-02/09
The Continuous Transmission Test Mode offers the following features:
• Continuous frame transmission
• Continuous wave signal transmission
The AT86RF230 offers a Continuous Transmission Test Mode to support final
application/production tests as well as certification tests. Using this test mode the radio
transceiver transmits continuously a previously downloaded frame data (PRBS mode)
or a continuous wave signal (CW mode).
In CW mode three different signal frequencies can be transmitted:
f
f
f
where f
(PHY_CC_CCA). Note that it is not possible to transmit a CW signal on the channel
center frequency. Before starting a CW signal transmission valid data needs to be
downloaded to the Frame Buffer (refer to section 6.2.2), e.g a PHR field denotes a
frame length of 1 and one octet PSDU data.
In PRBS mode the transmission center frequency is f
Buffer must contain at least a valid Frame Length Field (see sections 8.1 and 9.1). It is
recommended to use a frame of maximum length (127 bytes) and arbitrary PSDU data.
In contrast to normal frame transmission here the SHR and the PHR are not
transmitted. The transmission starts with the PSDU data and is repeated continuously.
Before enabling the Continuous Transmission Test Mode (TST = 1) all register
configurations shall be done as follows:
• Radio transceiver initialization (TRX_STATUS = TRX_OFF)
• TX channel selection (optional)
• TX output power setting (optional)
• Frame data download (random sequence of max. length)
• Mode selection (PRBS/CW)
Setting TST = 1 enables the Continuous Transmission Test Mode. The test system or a
microcontroller has to overwrite the pull down resistor R1 connected to the TST pin (see
Figure 5-1). The pull down resistor ensures a disabled test functionality during normal
operation (TST = 0).
The transmission is started after enabling the PLL (TRX_CMD = PLL_ON) and writing
the TX_START command to register 0x02.
The detailed programming sequence is shown in Figure A-1.
1
2
3
= f
= f
= f
CH
CH
CH
– 2 MHz
+ 0.5 MHz
- 0.5 MHz
CH
is the center frequency of the current programmed cannel in register 0x08
CH
. Data downloaded to the Frame
AT86RF230
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