AT86RF230-ZUR Atmel, AT86RF230-ZUR Datasheet - Page 48

• Manufacturer Part Number: AT86RF230-ZUR
• Description: TXRX LOW POWER 2.4GHZ 32VQFN
• Manufacturer: Atmel

Specifications of AT86RF230-ZUR

• Frequency: 2.4GHz
• 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: 15.5mA
• Current - Transmitting: 16.5mA
• 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: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 16.5 mA
• Minimum Operating Temperature: - 40 C
• Modulation: OQPSK
• Protocol Supported: 802.15.4
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 1.8V
• Operating Supply Voltage (typ): 3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Data Rate - Maximum: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

8.1.2.6 MAC Footer (MFR) Fields
8.2 Frame Check Sequence (FCS)
8.2.1.1 Overview
8.2.2 CRC calculation
48
AT86RF230
The MAC footer consists of a two-octet frame checksum (FCS). The AT86RF230 can
generate and evaluate this FCS automatically, for details refer to section 8.2.
The frame check sequence main features are:
• Indicates bit errors, based on a cyclic redundancy check (CRC) of length 16 bit
• Uses International Telecommunication Union (ITU) CRC polynomial
• Automatically evaluated during reception
• Can be automatically generated during transmission
The FCS is intended for use at the MAC level to detect corrupted frames. It is computed
by applying an ITU CRC polynomial to all transferred bytes following the length field
(MHR and MSDU fields). The frame check sequence has a length of 16 bit and is
located in the last two bytes of a frame (MAC footer, see Figure 8-2).
The AT86RF230 applies an FCS check on each received frame. The FCS check result
is stored to register bit RX_CRC_VALID in register 0x06 (PHY_RSSI). On transmit the
radio transceiver can be configured to autonomously compute and append the FCS
bytes.
The CRC polynomial used in IEEE 802.15.4-2003 networks is defined by
The FCS shall be calculated for transmission using the following algorithm:
Let
be the polynomial representing the sequence of bits for which the checksum is to be
computed. Multiply M(x) by x
Divide N(x) modulo 2 by the generator polynomial, G
polynomial,
The FCS field is given by the coefficients of the remainder polynomial, R(x) .
Example:
Considering a 5 octet ACK frame. The MHR field consists of
The leftmost bit (b
The leftmost bit (r
0100 0000 0000 0000 0101 0110.
0010 0111 1001 1110.
G
M
R
N
16
(
(
(
x
(
x
x
)
x
)
)
)
=
=
=
=
M
b
r
0
0
0
) is transmitted first in time.
x
0
) is transmitted first in time. The FCS would be following
x
(
16
x
15
x
k
)
−
+
+
1
⋅
x
x
+
x r
16
1
12
b
.
1
14
+
x
16
k
+
, giving the polynomial
x
−
5
2
...
+
+
+
1
K
r
.
14
+
x
b
+
k
−
r
15
2
x
+
b
k
−
1
16
(x) , to obtain the remainder
5131E-MCU Wireless-02/09