CC2430 Datasheet, PDF (135/212 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
Peripherals : Random Number Generator
13.11.3 Random Number Generator Registers
This section describes the Random Number Generator registers.
RNDL (0xBC) – Random Number Generator Data Low Byte
Bit Name
[7:0] _RNDL[7:0]
Reset R/W
0xFF R/W
Description
Random value/seed or CRC result, low byte
When used for random number generation writing this register
twice will seed the random number generator. Writing to this
register copies the 8 LSBs of the LFSR to the 8 MSBs and
replaces the 8 LSBs with the data value written.
The value returned when reading from this register is the 8 LSBs
of the LSFR.
When used for random number generation, reading this register
returns the 8 LSBs of the random number. When used for CRC
calculations, reading this register returns the 8 LSBs of the CRC
result.
RNDH (0xBD) – Random Number Generator Data High Byte
Bit Name
[7:0] _RNDH[7:0]
Reset R/W
0xFF R/W
Description
Random value or CRC result/input data, high byte
When written, a CRC16 calculation will be triggered, and the data
value written is processed starting with the MSB bit.
The value returned when reading from this register is the 8 MSBs
of the LSFR.
When used for random number generation, reading this register
returns the 8 MSBs of the random number. When used for CRC
calculations, reading this register returns the 8 MSBs of the CRC
result.
CC2430 Data Sheet (rev. 2.1) SWRS036F
Page 135 of 211