ATMEGA256RZAV-8AU Atmel, ATMEGA256RZAV-8AU Datasheet - Page 75
![MCU ATMEGA2561/AT86RF230 64-TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA256RZAV-8AU
Manufacturer Part Number
ATMEGA256RZAV-8AU
Description
MCU ATMEGA2561/AT86RF230 64-TQFP
Manufacturer
Atmel
Series
ATMEGAr
Datasheets
1.ATMEGA640V-8CU.pdf
(38 pages)
2.ATMEGA640V-8CU.pdf
(444 pages)
3.AT86RF230-ZU.pdf
(98 pages)
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
10 Radio Transceiver Usage
10.1 Frame Receive Procedure
10.2 Frame Transmit Procedure
5131E-MCU Wireless-02/09
This section describes basic procedures to receive and transmit frames using the
AT86RF230. For a detailed programming description refer to application note AVR2009
“AT86RF230 – Software Programming Model”.
While in state RX_ON the radio transceiver searches for incoming frames on the
selected channel. A detection of a valid IEEE 802.15.4 frame is indicated by an IRQ_2
(RX_START) interrupt. The frame reception is completed when issuing the IRQ_3
(TRX_END) interrupt. Waiting for IRQ_3 (TRX_END) interrupt before uploading the
frame to the microcontroller is recommended for operations considered to be non time
critical. Figure 9-6 illustrates the frame receive procedure.
Figure 9-6. Frame Receive Procedure - Transactions between AT86RF230 and
Microcontroller
Critical protocol timing could require starting the frame upload as soon as possible. The
first byte of the frame data can be read 32 µs after the IRQ_2 (RX_START) interrupt.
The microcontroller must ensure to read slower than the frame is received. Otherwise,
the Frame Buffer wills under run, IRQ_6 (TRX_UR) interrupt is issued. The frame data
are not valid anymore and need to read again. The LQI byte can be uploaded to the
microcontroller after the IRQ_3 (TRX_END) interrupt was issued.
A frame transmission comprises two actions, a frame download to the Frame Buffer and
the transmission of the Frame Buffer content. Both actions can be run in parallel if
required by critical protocol timing.
Figure 9-7 illustrates the frame transmit procedure, when downloading and transmitting
the frame consecutively. After a frame download by a Frame Buffer write access, the
frame transmission is initiated by asserting pin SLP_TR or writing the TRX command
TX_START to register 0x02 (TRX_STATE), while the radio transceiver is in state
PLL_ON. The completion of the transmission is indicated by an IRQ_3 (TRX_END)
interrupt.
AT86RF230
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