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AM486DX2 bảng dữ liệu(PDF) 38 Page - Advanced Micro Devices

tên linh kiện AM486DX2
Giải thích chi tiết về linh kiện  Am5X86??Microprocessor Family
PDF  67 Pages
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nhà sản xuất  AMD [Advanced Micro Devices]
Trang chủ  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM486DX2 bảng dữ liệu(HTML) 38 Page - Advanced Micro Devices

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38
Am5X86 Microprocessor
AMD
PRELIMINARY
Figure 20. Stop Clock State Machine
(valid for Write-back mode only)
Figure 21. Recognition of Inputs when Exiting Stop Grant State
t20
t21
CLK
STPCLK
NMI
SMI
A
STPCLK
Sampled
Note: A = Earliest time at which NMI or SMI is recognized.
A RESET or SRESET brings the CPU from the Stop
Grant state to the Normal state. The CPU recognizes
the inputs required for cache invalidations (HOLD,
AHOLD, BOFF, and EADS) as explained later. The CPU
does not recognize any other inputs while in the Stop
Grant state. Input signals to the CPU are not recognized
until 1 clock after STPCLK is deasserted (see Figure 21).
While in the Stop Grant state, the CPU does not recog-
nize transitions on the interrupt signals (SMI, NMI, and
INTR). Driving an active edge on either SMI or NMI does
not guarantee recognition and service of the interrupt
request following exit from the Stop Grant state. How-
ever, if one of the interrupt signals (SMI, NMI, or INTR)
is driven active while the CPU is in the Stop Grant state,
and held active for at least one CLK after STPCLK is
deasserted, the corresponding interrupt will be serviced.



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