AT86RF231-ZU Atmel, AT86RF231-ZU Datasheet - Page 62
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AT86RF231-ZU
Manufacturer Part Number
AT86RF231-ZU
Description
IC TXRX ZIGBE/802.15.4/ISM 32QFN
Manufacturer
Atmel
Datasheet
1.AT86RF231-ZUR.pdf
(198 pages)
Specifications of AT86RF231-ZU
Frequency
2.4GHz
Data Rate - Maximum
2Mbps
Modulation Or Protocol
802.15.4 Zigbee, 6LoWPAN, RF4CE, SP100, WirelessHART™, ISM
Applications
Industrial Monitoring and Control, Wireless Alarm and Security Systems
Power - Output
-17dBm ~ 3dBm
Sensitivity
-101dBm
Voltage - Supply
1.8 V ~ 3.6 V
Current - Receiving
12.3mA
Current - Transmitting
14mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Number Of Receivers
1
Number Of Transmitters
1
Wireless Frequency
2405 MHz to 2480 MHz
Interface Type
SPI
Noise Figure
6 dB
Output Power
20 dB
Operating Supply Voltage
2.5 V, 3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Maximum Supply Current
12.3 mA
Minimum Operating Temperature
- 40 C
Modulation
OQPSK
Protocol Supported
802.15.4
Transmitting Current
11.6mA
Data Rate
2Mbps
Frequency Range
2.405GHz To 2.48GHz
Modulation Type
O-QPSK
Sensitivity Dbm
-101dBm
Rf Ic Case Style
QFN
No. Of Pins
32
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT86RF231-ZU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
7.2.3.6
Figure 7-10. Example Timing of an RX_AACK Transaction for Slotted Operation
7.2.3.7
8111C–MCU Wireless–09/09
Frame Type
TRX_STATE
RX/TX
IRQ
Typ. Processing Delay
SLP_TR
RX_AACK Slotted Operation - Slotted Acknowledgement
RX_AACK Mode Timing
RX_AACK_ON
AT86RF231 supports slotted acknowledgement operation, refer to IEEE 802.15.4-2006, section
7.5.6.4.2, in conjunction with the microcontroller.
In RX_AACK mode with register bit SLOTTED_OPERATION (register 0x2C, XAH_CTRL_0) set,
the transmission of an acknowledgement frame has to be controlled by the microcontroller. If an
ACK frame has to be transmitted, the radio transceiver expects a rising edge on pin 11
(SLP_TR) to actually start the transmission. This waiting state is signaled 6 symbol periods after
the reception of the last symbol of a data or MAC command frame by register bits
TRAC_STATUS (register 0x02, XAH_CTRL_0), which are set to SUCCESS_WAIT_FOR_ACK
in that case. In networks using slotted operation the start of the acknowledgment frame, and
thus the exact timing, must be provided by the microcontroller.
A timing example of an RX_AACK transaction with register bit SLOTTED_OPERATION (register
0x2C, XAH_CTRL_0) set is shown in
ready to transmit 6 symbol times after the reception of the last symbol of a data or MAC com-
mand frame. The transmission of the acknowledgement frame is initiated by the microcontroller
with the rising edge of pin 11 (SLP_TR) and starts t
specified in
12.4.17.
If register bit AACK_ACK_TIME (register 0x17, XAH_CTRL_1) is set, an acknowledgment frame
can be sent already 2 symbol times after the reception of the last symbol of a data or MAC com-
mand frame.
A timing example of an RX_AACK transaction is shown in
ple a data frame of length 10 with an ACK request is received. The AT86RF231 changes to state
BUSY_RX_AACK after SFD detection. The completion of the frame reception is indicated by a
TRX_END interrupt. Interrupts IRQ_2 (RX_START) and IRQ_5 (AMI) are disabled in this exam-
ple. The ACK frame is automatically transmitted after a default wait period of 12 symbols
(192 µs), register bit AACK_ACK_TIME = 0 (reset value). The interrupt latency t
in
0
Section 12.4 “Digital Interface Timing Characteristics” on page
64
SFD
Section 12.4 “Digital Interface Timing Characteristics” on page
RX
RX
Data Frame (Length = 10, ACK=1)
waiting period signalled by register bits TRAC_STATUS
TRX_END
t
IRQ
512
BUSY_RX_AACK
(6 symbols)
Figure 7-10 on page
96 µs
t
TR10
SLP_TR
704
TR10
ACK transmission initated by microcontroller
= 16 µs later. The interrupt latency t
ACK Frame
Figure 7-11 on page
TX
TX
62. The acknowledgement frame is
157, parameter 12.4.17.
1026
AT86RF231
RX_AACK_ON
RX
RX
time [µs]
63. In this exam-
157, parameter
IRQ
is specified
IRQ
62
is