Datasheet

PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
DS60001320B-page 426 Preliminary  2015 Microchip Technology Inc.
REGISTER 27-2: RNGCON: RANDOM NUMBER GENERATOR CONTROL REGISTER
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
23:16
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
15:8
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — LOAD TRNGMODE CONT PRNGEN TRNGEN
7:0
R/W-0 R/W-1 R/W-1 R/W-0 R/W-0 R/W-1 R/W-0 R/W-0
PLEN<7:0>
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 31-13 Unimplemented: Read as ‘0’
bit 12 LOAD: Device Select bit
This bit is self-clearing and is used to load the seed from the TRNG (i.e., the random value) as a seed to
the PRNG.
bit 11 TRNGMODE: TRNG Mode Selection bit
1 = Use ring oscillators with bias corrector
0 = Use ring oscillators with XOR tree
Note: Enabling this bit will generate numbers with a more even distribution of randomness.
bit 10 CONT: PRNG Number Shift Enable bit
1 = The PRNG random number is shifted every cycle
0 = The PRNG random number is shifted when the previous value is removed
bit 9 PRNGEN: PRNG Operation Enable bit
1 = PRNG operation is enabled
0 = PRNG operation is not enabled
bit 8 TRNGEN: TRNG Operation Enable bit
1 = TRNG operation is enabled
0 = TRNG operation is not enabled
bit 7-0 PLEN<7:0>: PRNG Polynomial Length bits
These bits contain the length of the polynomial used for the PRNG.