AT86RF231-ZU Atmel, AT86RF231-ZU Datasheet - Page 136

• Manufacturer Part Number: AT86RF231-ZU
• Description: IC TXRX ZIGBE/802.15.4/ISM 32QFN
• Manufacturer: Atmel

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

11.2
11.2.1
11.2.2
8111C–MCU Wireless–09/09
Random Number Generator
Overview
Register Description
The AT86RF231 incorporates a 2-bit truly random number generator by observation of noise.
This random number can be used to:
The random number is updated every t
values are stored in register bits RND_VALUE (register 0x06, PHY_RSSI).
Register 0x06 (PHY_RSSI):
Register 0x06 (PHY_RSSI) is a multi purpose register to indicate FCS validity, to provide ran-
dom numbers and an RSSI value.
• Bit 7 - RX_CRC_VALID
Refer to register description in
• Bit [6:5] - RND_VALUE
The 2-bit random value can be retrieved by reading register bits RND_VALUE. Note that the
radio transceiver shall be in Basic Operating Mode receive state. The values are updated each
t
• Bit [4:0] - RSSI
Refer to register description in
Note:
TR29
Bit
+0x06
Read/Write
Reset Value
• Generate random seeds for CSMA-CA algorithm
• Generate random values for AES key generation
= 1 µs.
Ensure that register bit RX_PDT_DIS (register 0x15, RX_SYN) is set to 0 at least 1 µs before
reading a random value.
RX_CRC_VALID
7
R
0
6
R
0
Section 8.2.5 “Register Description” on page
Section 8.3.4 “Register Description” on page
RND_VALUE
5
R
0
TR29
= 1 µs in Basic Operation Mode receive states. The
4
R
0
3
R
0
RSSI
2
R
0
see
see
Section 7.2
Section 11.1
1
R
0
AT86RF231
87.
90.
0
R
0
PHY_RSSI
136