ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 58

• 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

9.4.2.5 TX_ARET_ON – Transmit with Automatic Retry and CSMA-CA Retry
Figure 9-12. Flow Diagram of TX_ARET
58
ATmega128RFA1
(s e e N o te 1 )
N
T R X _ S T A T E = B U S Y _ T X _ A R E T
N
N
T R X _ S T A T E = T X _ A R E T _ O N
T R A C _ S T A T U S = IN V A L ID
fra m e _ rc tr = fra m e _ rctr + 1
c sm a _ rc tr = c sm a _ rctr + 1
M A X _ F R A M E _ R E T R IE S
MAX_CSM A_RETRIES
T R A C _ S T A T U S =
R a n d o m B a c k -O ff
T ra n s m it F ra m e
A C K re q u e ste d
fra m e _ rctr = 0
cs m a _ rctr = 0
R e c e iv e A C K
u n til tim e o u t
fra m e _ rc tr >
A C K va lid
N O _ A C K
S ta rt T X
R e su lt
C C A
C C A
< 7
S u c ce ss
Y
Y
Y
Y
N
Y
F a ilu re
N
N
Y
S U C C E S S _ D A T A _ P E N D IN G
N o te 1 : If M A X _ C S M A _ R E T R IE S = 7 n o re try is
T R A C _ S T A T U S =
D a ta P e n d in g
p e rfo rm e d
Is su e T R X 2 4 _ T X _ E N D in te rru p t
MAX_CSMA_RETRIES
T R X _ S T A T E = T X _ A R E T _ O N
Y
c sm a _ rctr >
N
N
T R A C _ S T A T U S =
S U C C E S S
Y
C H A N N E L _ A C C E S S _ F A IL U R E
T R A C _ S T A T U S =
8266B-MCU Wireless-03/11