nRF24LE1 Nordic VLSI, nRF24LE1 Datasheet - Page 123

• Manufacturer Part Number: nRF24LE1
• Manufacturer: Nordic VLSI

nRF24LE1 Preliminary Product Specification
You can utilize the on-chip encryption/decryption co-processor for more time and power effective firmware.
The co-processor is an 8 by 8 Galois Field Multiplier with an 8 bits output. The following polynomial is
used:
m(x) = x8 + x4 + x3 + x + 1
This is the polynomial used by AES (Advanced Encryption Standard).
15.1
15.2
15.3
The following registers control the encryption/decryption co-processor.
Revision 1.1
15
Address
•
•
(Hex)
0xDD
0xDE
Firmware available from Nordic Semiconductor.
The result from the co-processing is available one clock period after the input data registers have
changed.
Encryption/decryption co-processor
cryptCoProcessor-
DataInA
CCPDATIA
cryptCoProcessor-
DataInB
CCPDATIB
Features
Block diagram
Functional description
8051 SFRBus
Name/Mnemonic
Interface
CryptCoProcessor
Figure 55. Encryption/decryption co-processor
Sfr
Bit
7:0
7:0
values
Reset
0x00
0x00
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CryptCoProcessorDataInA
CryptCoProcessorDataInB
CryptCoProcessorDataOut
Type
R/W Encryption/decryption co-processor data in
R/W Encryption/decryption co-processor data in
register A.
register B.
Description
CryptCoProcessor
Core