mk68901 STMicroelectronics, mk68901 Datasheet - Page 21

• Manufacturer Part Number: mk68901
• Description: Multi.function Peripheral
• Manufacturer: STMicroelectronics

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