ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 127

• 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

9.12.44 XAH_CTRL_0 – Transceiver Extended Operating Mode Control Register
8266A-MCU Wireless-12/09
• Bit 7:0 – IEEE_ADDR_77:70 - MAC IEEE Address
These bits map to the bits [63:56] of the 64 bit MAC IEEE address.
This register is used to control various settings of the Extended Operating Mode.
• Bit 7:4 – MAX_FRAME_RETRIES3:0 - Maximum Number of Frame Re-
The setting of MAX_FRAME_RETRIES in TX_ARET mode specifies the number of
attempts to retransmit a frame when it was not acknowledged by the recipient. The
transaction gets canceled if the number of attempts exceeds MAX_FRAME_RETRIES.
Table 9-66 MAX_FRAME_RETRIES Register Bits
• Bit 3:1 – MAX_CSMA_RETRIES2:0 - Maximum Number of CSMA-CA Procedure
MAX_CSMA_RETRIES specifies the number of retries in TX_ARET mode to repeat the
CSMA-CA procedure before the transaction gets canceled. According to IEEE 802.15.4
the valid range of MAX_CSMA_RETRIES is 0 to 5. A value of MAX_CSMA_RETRIES =
7 initiates an immediate frame transmission without performing CSMA-CA. This may
especially be required for slotted acknowledgment operation. MAX_CSMA_RETRIES =
6 is reserved.
Bit
NA ($16C)
Read/Write
Initial Value
Bit
NA ($16C)
Read/Write
Initial Value
Bit
NA ($16C)
Read/Write
Initial Value
Bit
NA ($16C)
Read/Write
Initial Value
Register Bits
MAX_FRAME_RETRIES3:0
transmission Attempts
Repetition Attempts
MAX_FRAME_RETRIES3
MAX_FRAME_RETRIES1
MAX_CSMA_RETRIES2
MAX_CSMA_RETRIES0
RW
RW
RW
RW
7
0
5
1
3
1
1
0
Value
0xF
0x0
0x1
0x2
MAX_FRAME_RETRIES2
MAX_FRAME_RETRIES0
MAX_CSMA_RETRIES1
SLOTTED_OPERATION
Description
Retransmission of frame is not attempted.
Retransmission of frame is attempted once.
...
Retransmission of frame is attempted 15
times.
ATmega128RFA1
RW
RW
RW
RW
6
0
4
1
2
0
0
0
XAH_CTRL_0
XAH_CTRL_0
XAH_CTRL_0
XAH_CTRL_0
127