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MK68901 数据表(PDF) 21 Page - STMicroelectronics

部件名 MK68901
功能描述  MULTI.FUNCTION PERIPHERAL
PDF  33 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

MK68901 数据表(HTML) 21 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (VCC = 5.0Vdc ± 5%, GND = 0Vdc, TA =0°Cto 70°C)
Val ue
MK689 01-4
MK689 01-5
Number
Characteristic
Min.
Max.
Min.
Max.
Unit
Fi g.
Note
1
CS, DS Width High
50
35
ns
21,22
5
2
R/W, A1-A5 Valid to Falling CS (setup)
0
0
ns
21,22
3
Data Valid Prior to Falling CLK
280
0
ns
22
4
CS, IACK Valid to Falling Clock (setup)
50
45
ns
21-24
3
5
CLK Low to DTACK Low
220
180
ns
21,22
6
CS, DS or IACK High to DTACK High
60
55
ns
21-24
7
CS, DS or IACK High to DTACK Tri-state
100
95
ns
21-24
8
DTACK Low to Data Invalid (hold time)
0
0
ns
22
9
CS, DS or IACK High to Data Tri-state
50
50
ns
21,23,24
10
CS or DS High to R/W, A1-A5 Invalid (hold time)
0
0
ns
21,22
11
Data Valid from CS Low
310
260
ns
21
3,6
12
Read Data Valid to DTACK Low (setup)
50
50
ns
21
13
DTACK Low to DS, CS or IACK High (hold time)
0
0
ns
21-23
14
IEI Low to Falling CLK (setup)
50
50
ns
23,24
15
IEO Valid from Clock Low (delay)
180
180
ns
23
1
16
Data Valid from Clock Low (delay)
300
300
ns
23
17
IEO Invalid from IACK High (delay)
150
150
ns
23, 24
18
DTACK Low from Clock High (delay)
180
165
ns
23, 24
19
IEO Valid from IEI Low (delay)
100
100
ns
24
1
20
Data Valid from IEI Low (delay)
220
220
ns
24
21
Clock Cycle Time
250
1000
200
1000
ns
21
22
Clock Width Low
110
90
ns
21
23
Clock Width High
110
90
ns
21
24
CS, IACK Inactive to Rising Clock (setup)
100
80
ns
21-23
4,5
25
I/O Minimum Active Pulse Width
100
100
ns
25
26
IACK Width High
2
2
T CL K
23-24
2
27
I/O Data Valid from Rising CS or DS
450
450
ns
26
28
Receiver Ready Delay from Rising RC
600
600
ns
27
29
Transmitter Ready Delay from Rising TC
600
600
ns
28
30
Timer Output Low from Rising Edge of CS or DS
(A & B) (reset T OUT)
450
450
ns
29
7
31
T OUT Valid from Internal Timeout
2 tCL K
+ 300
2tCL K
+ 300
ns
29
2
32
Timer Clock Low Time
110
90
ns
29
MK68901
21/33



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