ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 44

• Manufacturer Part Number: ATMEGA128RFA1-ZU
• Description: IC AVR MCU 2.4GHZ XCEIVER 64QFN
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA128RFA1-ZU

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 3.5dBm
• Sensitivity: -100dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 12.5mA
• Current - Transmitting: 14.5mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB Flash, 4kB EEPROM, 16kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN, Exposed Pad
• Rf Ic Case Style: QFN
• No. Of Pins: 64
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Processor Series: ATMEGA128x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 16 KB
• Interface Type: JTAG
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 6
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVR128RFA1-EK1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.4.2 Extended Operating Mode
44
No
24
25
26
27
28
29
Symbol Block
t
t
t
t
t
t
TR24
TR25
TR26
TR27
TR28
TR29
ATmega128RFA1
PLL, TX
RSSI, update
ED
SHR, sync
CCA
Random value
RX
Time [µs], (typ)
The Extended Operating Mode is a hardware MAC accelerator and goes beyond the
basic radio transceiver functionality provided by the Basic Operating Mode. It handles
time critical MAC tasks requested by the IEEE 802.15.4 standard or by hardware such
as automatic acknowledgement, automatic CSMA-CA and retransmission. This results
in a more efficient IEEE 802.15.4 software MAC implementation including reduced code
size and may allow operating at lower microcontroller clock rates.
The Extended Operating Mode is designed to support IEEE 802.15.4-2006 compliant
frames; the mode is backward compatible to IEEE 802.15.4-2003 and supports non
IEEE 802.15.4 compliant frames. This mode comprises the following procedures:
Automatic acknowledgement (RX_AACK) divides into the tasks:
• Frame reception and automatic FCS check;
• Configurable addressing fields check;
• Interrupt indicating address match;
• Interrupt indicating frame reception, if it passes address filtering and FCS check;
• Automatic ACK frame transmission (if the received frame passed the address filter
• Support of slotted acknowledgment using SLPTR bit for frame start.
Automatic CSMA-CA and Retransmission (TX_ARET) divides into the tasks:
• CSMA-CA including automatic CCA retry and random back-off;
• Frame transmission and automatic FCS field generation;
• Reception of ACK frame (if an ACK was requested);
• Automatic frame retry if ACK was expected but not received;
• Interrupt signaling with transaction status.
Automatic FCS check and generation (refer to
page 67)
automatic FCS check is always performed for incoming frames.
An ACK received in TX_ARET mode within the time required by IEEE 802.15.4 is
accepted if the FCS is valid and if the sequence number of the ACK matches the
sequence number of the previously transmitted frame. Dependent on the value of the
and FCS check and if an ACK is required by the frame type and ACK request);
96
is used by the RX_AACK and TX_ARET modes. In RX_AACK mode an
140
140
32
2
1
Time [µs], (max) Comments
Maximum PLL settling time TX
RSSI update period in receive states, refer to
RSSI" on page 69
ED measurement period, refer to
Description" on page 70
Typical
"Measurement Description" on page 70
CCA measurement period, refer to
CCA Request" on page 72
Random value update period, refer to
Number Generator" on page 86
SHR
synchronization
"Frame Check Sequence (FCS)" on
RX
8266B-MCU Wireless-03/11
period,
"Configuration and
"Measurement
refer
"Random
"Reading
to