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參數(shù)資料
| 型號(hào)： | TK68HC24 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Port Replacement Unit (PRU) |
| 中文描述： | 港口更換單元（普天壽） |
| 文件頁數(shù)： | 20/21頁 |
| 文件大?。?/td> | 98K |
| 代理商： | TK68HC24 |
Tekmos
TK68HC24 PRU
20
www.Tekmos.com
8/21/99
Bus Timing Characteristics
(Vdd = 5.0 V + 10%, Vss = 0 V, TA = -40
o
C to +85
o
C unless otherwise noted; see Figure 10 for detailed timing
diagrams)
1 MHz
2.1 MHz
Min
476
200
210
-
Ident.
Number
1
2
3
4
Characteristic
Symbol
Min
1000
430
450
-
Max
-
-
-
25
Max
-
-
-
20
Unit
Cycle Time
Pulse Width, E Low
Pulse Width, E High
Input and Clock Rise and Fall
Time
RWN Hold Time
Setup Time before Rising
Edge of E (RWN, CSN)
Chip Select Hold Time (CSN)
Read Data Hold Time
Write Data Hold Time
Muxed Address Valid Time to
AS Fall
Muxed Address Hold Time
Delay Time, E Fall to AS Rise
AS Pulse Width High
AS Fall to E Rise
Peripheral Output Data Delay
Time from E Rise (Read)
Peripheral Data Setup Time
(Write)
tcyc
PWEL
PWEH
tr, tf
ns
ns
ns
ns
8
13
tRWH
tRWS
20
100
-
-
10
50
-
-
ns
ns
15
18
21
24
tCSH
tDHR
tDHW
tASL
20
10
10
60
-
20
10
10
30
-
ns
ns
ns
ns
75
-
-
75
-
-
25
26
27
28
30
tAHL
tASD
tWASH
tASED
tDDR
40
60
150
60
20
-
-
-
-
20
30
75
30
10
-
-
-
-
ns
ns
ns
ns
ns
240
120
31
tDSW
150
-
75
-
ns
27
28
28
2
3
Figure 10. Bus Timing Diagram
AS
E
A12-
A15,
RWN
CSN
AD0-7
(Write)
AD0-7
(Read)
8
15
13
24
25
21
18
30
31
1
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