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Bitfields for Intel 82443BX DRAM Read/Write Thermal Throttling Control

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Bit Description

63

lock all read and write throttle control register bits (exists in Write Throttling control register only)

62 - 46

reserved

45 - 38

global DRAM sampling window (in four-millisecond units)

37 - 26

global QWORD threshold (documented as units of 215, but may be typo and actually be units of 2^15 = 32768)
thermal throttling will be invoked if the number of QWORD accesses during the sampling window exceeds the threshold count

25 - 20

throttle time in multiples of the sampling window

19 - 13

throttle monitoring window in 16 DRAM-clock units

12 - 3

throttle QWORD maximum count -- while throttling is enabled, at most this many QWORD accesses are permitted during each throttle monitoring window

2 - 0

DRAM Throttle Mode
100 = normal operation
other = Intel Reserved

See Also:

#01142