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IDT79R3041-20JG8

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P34
22
IDT79R3041 INTEGRATED RISController FOR LOW COST SYSTEMS COMMERCIAL TEMPERATURE RANGE
Figure 13. Single Datum Read
PhiClk
SysClk
Rd
A/D(31:0)
ALE
Addr(3:2)
Addr
BE
DataEn
RdCEn
Word Address
Stall Stall Stall Stall Stall Fixup
Ack
Burst
Diag
Start
Read
Extended
Address
Sample
Data
End
Read
Run/
Stall
Ack/
RdCEn
Cached? I/D
Data Input
t
7
t
14
t
8
t
7
t
12
t
1
t
2
t
15
t
2a
t
15
t
1a
t
14
t
17
t
17
t
18
t
16
ExtDataEn
t
49
t
48
Last
t
15
MemStrobe
IOStrobe
t
47
t
50
t
17
t
16
t
18
t
12
t
15
t
51
Ack/
RdCEn
?
Ack/
RdCEn
?
t
9
t
7a
2905 drw 17
t
7b
23
IDT79R3041 INTEGRATED RISController FOR LOW COST SYSTEMS COMMERCIAL TEMPERATURE RANGE
PhiClk
SysClk
Rd
A/D(31:0)
ALE
Addr(3:0)
Addr
DataEn
RdCEn
'nn00'
Stall Stall Stall
Ack
Last
Diag
Start
Read
Extended
Address
Sample
Data
New
Transaction
Run/
Stall
Ack/
RdCEn
Cached?
t
7
t
14
t
8
t
9
t
7b
t
12
t
2
t
17
t
17
t
18
t
15
Byte 0
t
2a
t
1a
t
14
t
15
Byte 1
t
2a
t
1a
Byte 2
t
2a
t
1a
Byte 3
t
2a
t
1a
'nn01' 'nn10' 'nn11'
t
1
t
2
t
1
t
2
t
1
t
2
t
16
t
16
t
16
Sample
Data
Sample
Data
Sample
Data
RdCEn RdCEnRdCEn
I/D
t
16
ExtDataEn
t
49
t
48
Burst
t
7
MemStrobe
IOStrobe
t
50
t
47
t
50
t
51
t
50
t
50
t
51
t
51
t
16
t
1
t
15
t
15
t
17
Stall Stall Stall Fixup
t
18
t
12
t
15
t
51
t
7a
2905 drw 18
Figure 14. Mini-burst read of 32-bit datum from 8-bit wide memory port
24
IDT79R3041 INTEGRATED RISController FOR LOW COST SYSTEMS COMMERCIAL TEMPERATURE RANGE
PhiClk
SysClk
Rd
A/D(31:0)
ALE
Addr(3:2)
Addr
BE
DataEn
RdCEn
'00'
Stall Stall Stall
Refill/
Fixup
Ack
Last
Diag
Start
Read
Extended
Address
Sample
Data
New
Transaction
Run/
Stall
Ack/
RdCEn
Cached
t
7
t
14
t
8
t
9
t
7b
t
12
t
1
t
2
t
17
t
17
t
18
t
15
Word 0
t
2a
t
1a
t
14
t
15
Word 1
t
2a
t
1a
Word 2
t
2a
t
1a
Word 3
t
2a
t
1a
'01' '10' '11'
t
1
t
2
t
1
t
2
t
1
t
2
Refill/
Stream/
Fixup
Refill/
Stream/
Fixup
Refill/
Stream/
Fixup
t
16
t
16
t
16
Sample
Data
Sample
Data
Sample
Data
RdCEn RdCEn RdCEn
I/D
Word 0 Word 1 Word 2 Word 3
t
16
ExtDataEn
t
49
t
48
Burst
t
7
MemStrobe
IOStrobe
t
50
t
47
t
50
t
51
t
50
t
50
t
51
t
51
t
16
t
17
t
15
t
15
t
51
t
18
t
12
t
7a
2905 drw 19
Figure 15. R3041 Quad Word Read
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IDT79R3041-20JG8

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IC MPU MIPS-I 20MHZ 84PLCC
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