AT86RF212 Atmel Corporation, AT86RF212 Datasheet - Page 139

• Manufacturer Part Number: AT86RF212
• Manufacturer: Atmel Corporation

Specifications of AT86RF212

• Max. Operating Frequency: 0 MHz
• Crypto Engine: AES
• Operating Voltage (vcc): 1.8 to 3.6
• Frequency Band: 700/800/900MHz
• Max Data Rate (mb/s): 1
• Antenna Diversity: No
• External Pa Control: Yes
• Power Output (dbm): 10
• Receiver Sensitivity (dbm): -110
• Receive Current Consumption (ma): 9.0
• Transmit Current Consumption (ma): 18 at 5dBm
• Link Budget (dbm): 120

9.2 Random Number Generator
9.2.1 Overview
9.2.2 Register Description
8168C-MCU Wireless-02/10
Table 9-8. AES Direction
• Bit 2:0 – Reserved
Register 0x94 (AES_CTRL_MIRROR):
Register 0x94 is a mirrored version of register 0x83 (AES_CTRL); for details, refer to
register 0x83 (AES_CTRL).
Table 9-9. Register 0x94 (AES_CTRL_MIRROR)
This register could be used to start a security operation within a single SRAM access by
appending it to the data stream and setting register bit AES_REQUEST = 1.
The AT86RF212 provides a 2-bit random number generator. This random number can
be used to
• generate random seeds for CSMA-CA algorithm, see section 5.2
• generate random values for AES key generation, see section 9.1
Random numbers are stored in register bits RND_VALUE (register 0x06, PHY_RSSI).
The random number is updated at every read access in Basic Operating Mode receive
states (RX_ON, BUSY_RX). The Random Number Generator does not work if the
preamble detector is disabled (RX_PDT_DIS = 1, refer to section 7.2.3).
Register 0x06 (PHY_RSSI):
Register 0x06 (PHY_RSSI) is a multi purpose register to indicate FCS validity, to
provide random numbers, and an RSSI value.
Bit
Name
Read/Write
Reset Value
Bit
Name
Read/Write
Reset Value
Register Bit
AES_DIR
7
AES_REQUEST
W
0
3
AES_DIR
R/W
0
Value
0
1
6
AES_MODE[2]
R/W
0
2
Reserved
R
0
Description
AES encryption (ECB, CBC)
AES decryption (ECB)
5
AES_MODE[1]
R/W
0
1
Reserved
R
0
AT86RF212
4
AES_MODE[0]
R/W
0
0
Reserved
R
0
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