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PC87306 bảng dữ liệu(PDF) 100 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện PC87306
Giải thích chi tiết về linh kiện  PC87306 SuperI/OTM Enhanced Sidewinder Lite Floppy Disk Controller, Keyboard Controller, Real-Time Clock, Dual UARTs, Infrared Interface, IEEE 1284 Pa
PDF  110 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87306 bảng dữ liệu(HTML) 100 Page - National Semiconductor (TI)

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120 Electrical Characteristics (Continued)
1228 DMA Timing
12281 FDC
Symbol
Parameter
Min
Max
Units
tKI
FDACK Inactive Pulse Width
25
ns
tKK
FDACK Active Pulse Width
65
ns
tKQ
FDACK Active Edge to FDRQ Inactive
65
ns
tQK
FDRQ to FDACK Active Edge
10
ns
tQP
FDRQ Period (except Non-Burst DMA) (Note 3)
8 x tDRP
m
s
tQQ
FDRQ Inactive Non-Burst Pulse Width
300
400
ns
tQR
FDRQ to RD or WR Active
15
ns
tQW
FDRQ to End of RD WR (Notes 2 3)
(8xtDRP) b(16xtICP)
m
s
(FDRQ Service Time)
tQT
FDRQ to TC Active (Notes 2 3)
(8 x tDRP) b(16xtICP)
m
s
(FDRQ Service Time)
tRQ
RD WR Active Edge to FDRQ Inactive
65
ns
(Note 1)
tTQ
TC Active Edge to FDRQ Inactive
75
ns
tTT
TC Active Pulse Width
50
ns
Note 1
The active edge of RD or WR and TC is recognized only when FDACK is active
Note 2
Values shown are with the FIFO disabled or with FIFO enabled and THRESH e 0 For nonzero values of THRESH add (THRESHx8xtDRP) to the values
shown
Note 3
tDRP and tICP are defined in Table 12-1
TLC12379 – 79
FIGURE 12-11 FDC DMA Timing
100



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