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PC87570 bảng dữ liệu(PDF) 41 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện PC87570
Giải thích chi tiết về linh kiện  PC87570 Keyboard and Power Management Controller
PDF  168 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87570 bảng dữ liệu(HTML) 41 Page - National Semiconductor (TI)

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Bus Interface Unit (BIU)
41
www.national.com
Other SZCFGn
configuration
SZCFGn.HOLD = 0
SZCFGn.HOLD
≠ 0
SZCFGn.WAIT
≠ 0
SZCFGn.WAIT = 0
Address placed on A0-15,
SELn: activated
RD: active
Address on A0-15 invalid/changed,
SELn and RD inactive
RD: active,
End of T2: Data is sampled
Internal waits corresponding to SZCFGn.WAIT
T1
TIW
TBW
T1
begin
Hold cycles completed
Thold
T2
T2B
end
{SZCFGn.BW = 1 or
SZCFGn.BRE = 0 or
Core attempts to read a byte}
SZCFGn.BW = 0
SZCFGn.(WBR,BRE} = 11
Core attempts to read a word
Next address on A0-15,
End of T2B: Data sampled
Hold cycles according
to SZCFGn.HOLD
First Thold: SELn
and RD are deactivated
SZCFGn.{BW,WBR,BRE} = 001
Core attempts to read a word
Figure 3-9. Normal Read Bus Cycle
Note: Any reference to SZCFGn, also applies to the IOCFG Register.
Any reference to SELn, also applies to the SELIO signal.
TBW and T2B states do not exist in bus cycles of the IO zone.
Internal waits completed
SZCFGn.HOLD
≠ 0
Next address
on A0-15



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