ATMEGA256RZBV-8AU Atmel, ATMEGA256RZBV-8AU Datasheet - Page 13

• Manufacturer Part Number: ATMEGA256RZBV-8AU
• Description: MCU ATMEGA2560/AT86RF230 100TQFP
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA256RZBV-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: 100-TQFP
• Wireless Frequency: 2.4 GHz
• Interface Type: JTAG, SPI
• Output Power: 3 dBm
• Operating Temperature Range: - 55 C to + 125 C
• 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

Figure 6-6. Example SPI Sequence - Register Access Mode
6.2.2 Frame Buffer Access Modes
Figure 6-7. Packet Structure - Frame Buffer Write Access
SCLK
MOSI
MISO
5131E-MCU Wireless-02/09
SEL
Register Write Access
WRITE COMMAND
XX
Figure 6-5. Packet Structure – Register Read Access
Each register access must be terminated by setting SEL = H.
Figure 6-6 illustrates a typical SPI sequence for a register access sequence for write
and read respectively.
The Frame Buffer read access and the Frame Buffer write access are used to upload or
download frames to the microcontroller.
Each access starts by setting SEL = L. The first byte transferred on MOSI is the
command byte and must indicate a Frame Buffer access mode according to the
definition in Table 6-2.
On Frame Buffer write access the second byte transferred on MOSI contains the frame
length (PHR field) followed by the payload data (PSDU) as shown by Figure 6-7.
On Frame Buffer read access PHR and PSDU are transferred via MISO starting with
the second byte. After the PSDU data bytes one more byte can be transferred
containing the link quality indication (LQI) value of the received frame, for details refer
to section 8.5. Figure 6-8 illustrates the packet structure of a Frame Buffer read access.
Note, the Frame Buffer read access can be terminated at any time without any
consequences by setting SEL = H, e.g. after reading the frame length byte only.
MOSI
MISO
WRITE DATA
1
XX
byte 1 (command byte)
0
address[5:0]
XX
Register Read Access
read data[7:0]
byte 2 (data byte)
READ COMMAND
XX
XX
READ DATA
AT86RF230
XX
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