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IDT79R3041-20JG8
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P34
25
IDT79R3041 INTEGRATED RISController FOR LOW COST SYSTEMS
COMMERCIAL TEMPERATURE RANGE
Figure 16(a). Quad Word Read to 16-bit wide Memory Port
PhiClk
SysClk
Rd
A/D(31:0)
ALE
Addr(3:1)
Addr
DataEn
RdCEn
'000'
Stall
Stall
Stall
Ack
Last
Diag
Start
Read
Extended
Address
Sample
Data
Run/
Stall
Cached
t
7
t
14
t
8
t
9
t
12
t
17
t
17
t
18
t
15
Halfword 0
t
2a
t
1a
t
14
Halfword 1
t
2a
t
1a
Halfword 2
t
2a
t
1a
Halfword 3
t
2a
t
1a
'001'
'010'
'011'
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
RdCEn
RdCEn
I/D
t
16
ExtDataEn
t
48
Burst
t
7
MemStrobe
IOStrobe
t
50
t
47
t
51
t
50
t
51
t
51
t
16
'100'
t
51
t
1
t
2
BE16(1:0)
'00'
'00'
'00'
'00'
t
16
t
16
t
16
t
16
'00'
RdCEn
Stall
Stall
Stall
Stall
t
1
t
2
RdCEn
t
16
t
50
t
50
t
50
t
18
t
12
t
7a
2905 drw 20
26
IDT79R3041 INTEGRATED RISController FOR LOW COST SYSTEMS
COMMERCIAL TEMPERATURE RANGE
Figure 16(b). End of Quad Word read from 16-bit Wide Memory Port
PhiClk
SysClk
Rd
A/D(31:0)
ALE
Addr(3:1)
DataEn
RdCEn
'100'
Stall
Refill/
Fixup
Ack
Last
Diag
Sample
Data
New
Transaction
Ack/
RdCEn
t
1
t
2
t
15
Halfword 4
t
2a
t
1a
t
14
t
15
Halfword 5
t
2a
t
1a
Halfword 6
t
2a
t
1a
Halfword 7
t
2a
t
1a
'101'
'110'
'111'
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
Word 0
Word 1
Word 2
Word 3
Stall
I/D
t
16
ExtDataEn
t
49
Burst
t
7b
MemStrobe
IOStrobe
t
17
t
50
t
51
t
50
t
51
t
50
t
51
BE16(1:0)
'00'
'00'
'00'
'00'
t
16
t
16
t
16
t
16
t
51
t
15
2905 drw 21
27
IDT79R3041 INTEGRATED RISController FOR LOW COST SYSTEMS
COMMERCIAL TEMPERATURE RANGE
SysClk
Wr
A/D(31:0)
ALE
Addr(3:2)
Addr
BE
Word Address
Ack
WrNear
Start
Write
Extended
Address
Data Out/
Ack?
Ack?
Negate
Write
New
Transfer
Ack
Data Output
t
7a
t
14
t
8
t
7
t
1
t
2
t
15
t
14
t
19
t
16
ExtDataEn
t
49
t
11
Last
t
15
MemStrobe
IOStrobe
t
47
t
50
t
16
t
15
t
51
t
7
2905 drw 22
t
7b
Figure 17. Basic Write to 32-bit Memory Port
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P34
IDT79R3041-20JG8
Mfr. #:
Buy IDT79R3041-20JG8
Manufacturer:
Description:
IC MPU MIPS-I 20MHZ 84PLCC
Lifecycle:
New from this manufacturer.
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