AT86RF232 Atmel Corporation, AT86RF232 Datasheet - Page 60

• Manufacturer Part Number: AT86RF232
• Manufacturer: Atmel Corporation

Specifications of AT86RF232

• Max. Operating Frequency: 0 MHz
• Crypto Engine: AES
• Operating Voltage (vcc): 1.8 to 3.6
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 0.25
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -100
• Receive Current Consumption (ma): 11.8
• Transmit Current Consumption (ma): 13.8
• Link Budget (dbm): 103

Figure 7-15. Example Timing of a TX_ARET Transaction.
60
FrameType
TRX_STATE
RX/TX
SLP_TR
IRQ
Typ. Processing Delay
AT86RF232
TX_ARET_ON
0
CSMA-CA
t
CSMA-CA
Table 7-12. Interpretation of TRAC_STATUS Register Bits.
If no ACK is expected (according to the content of the received frame in the Frame
Buffer), the radio transceiver issues IRQ_3 (TRX_END) directly after the frame
transmission has been completed. The value of register bits TRAC_STATUS
(register 0x02, TRX_STATE) is set to SUCCESS.
A value of MAX_CSMA_RETRIES = 7 initiates an immediate TX_ARET transaction
without performing CSMA-CA. This can be used for example to transmit indirect data to
a device. Further the value MAX_FRAME_RETRIES is ignored and the TX_ARET
transaction is performed only once.
A timing example of a TX_ARET transaction is shown in
Here an example data frame of length 10 with an ACK request is transmitted. After that
the Atmel AT86RF232 switches to receive mode and expects an acknowledgement
response. During the whole transaction including frame transmit, wait for ACK and ACK
receive the radio transceiver status register bits TRX_STATUS (register 0x01,
TRX_STATUS) signals BUSY_TX_ARET.
A
IRQ_3 (TRX_END).
128
Notes:
Value
0
1
3
5
7
successful
t
TR10
Data Frame (Length = 10, ACK=1)
1.
2.
Name
SUCCESS
SUCCESS_DATA_PENDING
CHANNEL_ACCESS_FAILURE
NO_ACK
INVALID
t
Timing figure t
CSMA-CA
TX
TX
reception
defines the random CSMA-CA backoff time.
The
BUSY_TX_ARET
TR10
672
status
of
and t
t
TR11
the
TR11
register
refer to
x
acknowledgment
Description
The transaction was responded by a valid
ACK, or, if no ACK is requested, after a
successful frame transmission.
Equivalent to SUCCESS, indicates pending
frame data according to the MHR frame
control field of the received ACK response.
Channel is still busy after
MAX_CSMA_RETRIES of CSMA-CA.
No acknowledgement frames were received
during all retry attempts.
Transaction not yet finished.
Table
RX
RX
bits
ACK Frame
7-1.
TRX_STATUS
Figure
frame
7-15.
x+352
8321A–MCU Wireless–10/11
is
TRX_END
t
TX_ARET_ON
IRQ
(register 0x01,
indicated
time [µs]
by