參數(shù)資料
型號(hào)： INTEL82802AB
廠商： Intel Corp.
英文描述： Firmware Hub (FWH)
中文描述： 固件集線器（固件樞紐）
文件頁(yè)數(shù)： 27/53頁(yè)
文件大?。?/td> 471K
代理商： INTEL82802AB
Intel
82802AB/AC Firmware Hub
R
Datasheet
27
4.9.3.
Random Number Generator Registers
When enabled and active, the Random Number Generator (RNG) is designed to fill an 8-bit register, a
bit at a time, with hardware-generated random numbers. When this register is full, a flag bit in the RNG
data status register transitions to a 1, indicating that a valid random number is ready to be read. This bit
will immediately reset to 0 upon reading the RNG data register.
The advantages of random numbers over pseudo-random numbers as well as a brief overview of the
simple mathematics of testing RNGs are discussed superficially in the companion document,
The Intel
Platform RNG Tech Brief
, which is available online.
4.9.3.1.
RNG Hardware Status Register
Memory Address:
Default Value:
Access:
Size:
FFBC015Fh
40h, for typical component out of reset
RO
8 bits
Bit
Function
7
Reserved
6
RNG Present—RO.
Determines whether or not an RNG is present on this component, or if it has been
disabled.
1 = RNG Present
0 = RNG not present
5:1
Reserved
0
RNG Enabled—R/W.
Determines whether the RNG is generating a random number.
1 = RNG enabled
0 = RNG disabled
4.9.3.2.
RNG Data Status Register
Memory Address:
Default Value:
Access:
Size:
FFBC0160h
00h
RO
8 bits
Bit
Function
7:1
Reserved
0
RNG Output Valid.
Determines whether the RNG data register contains a valid random number.
1 = RNG data register contians valid random data
0 = RNG data register contents not valid
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