ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 64

• Manufacturer Part Number: ATmega1284PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega1284PR231

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -101
• Receive Current Consumption (ma): 13.2
• Transmit Current Consumption (ma): 14.4
• Link Budget (dbm): 104

7.2.4
8111C–MCU Wireless–09/09
TX_ARET_ON - Transmit with Automatic Retry and CSMA-CA Retry
Figure 7-12. Flow Diagram of TX_ARET
(see Note 1)
N
TRX_STATE = BUSY_TX_ARET
N
N
TRX_STATE = TX_ARET_ON
TRAC_STATUS = INVALID
frame_rctr = frame_rctr + 1
csma_rctr = csma_rctr + 1
MAX_FRAME_RETRIES
MAX_CSMA_RETRIES
TRAC_STATUS =
Random Back-Off
Transmit Frame
ACK requested
frame_rctr = 0
csma_rctr = 0
Receive ACK
until timeout
frame_rctr >
ACK valid
NO_ACK
Start TX
Result
CCA
CCA
<7
Success
Y
Y
Y
Y
N
Y
Failure
N
N
Y
SUCCESS_DATA_PENDING
Note 1: If MAX_CSMA_RETRIES = 7 no retry is
TRAC_STATUS =
Data Pending
performed
Issue IRQ_3 (TRX_END) interrupt
MAX_CSMA_RETRIES
TRX_STATE = TX_ARET_ON
Y
csma_rctr >
N
N
TRAC_STATUS =
SUCCESS
Y
CHANNEL_ACCESS_FAILURE
AT86RF231
TRAC_STATUS =
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