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PC87306 bảng dữ liệu(PDF) 95 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) 95 Page - National Semiconductor (TI)

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120 Electrical Characteristics (Continued)
1222 Clock Timing
Symbol
Parameter
Min
Max
Units
tCH
Clock High Pulse Width
16
ns
tCL
Clock Low Pulse Width
16
ns
tCP
Clock Period
40
43
ns
tICP
Internal Clock Period
(Table 12-1)
ns
tDRP
Data Rate Period
(Table 12-1)
ns
TABLE 12-1 Nominal tICP tDRP Values
MFM Data Rate
tDRP
tICP
Value
Units
1 Mbps
1000
3 x tCP
125
ns
500 kbps
2000
3 x tCP
125
ns
300 kbps
3333
5 x tCP
208
ns
250 kbps
4000
6 x tCP
250
ns
TLC12379 – 68
FIGURE 12-1 Clock Timing
1223 Microprocessor Interface Timing
Symbol
Parameter
Min
Max
Units
tAR
Valid Address to Read Active
18
ns
tAW
Valid Address to Write Active
18
ns
tDH
Data Hold
0
ns
tDS
Data Setup
18
ns
tHZ
Read to Floating Data Bus
13
25
ns
tPS
Port Setup
10
ns
tRA
Address Hold from Inactive Read
0
ns
tRCU
Read Cycle Update
45
ns
tRD
Read Strobe Width
60
ns
tRDH
Read Data Hold
10
ns
tRI
Read Strobe to Clear IRQ6
55
ns
tRVD
Active Read to Valid Data
55
ns
tWA
Address Hold from Inactive Write
0
ns
tWCU
Write Cycle Update
45
ns
tWI
Write Strobe to Clear IRQ6
55
ns
tWO
Write Data to Port Update
60
ns
tWR
Write Strobe Width
60
ns
RC
Read Cycle e tAR a tRD a tRCU
123
ns
WC
Write Cycle e tAW a tWR a tWCU
123
ns
tWRR
RD Low after WR High
80
ns
95



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