![](http://datasheet.mmic.net.cn/IDT--Integrated-Device-Technology-Inc/IDT72V3690L6PF_datasheet_105070/IDT72V3690L6PF_23.png)
23
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V3640/50/60/70/80/90 3.3V HIGH DENSITY SUPERSYNC IITM 36-BIT FIFO
1,024 x 36, 2,048 x 36, 4,096 x 36, 8,192 x 36, 16,384 x 36 and 32,768 x 36
OCTOBER 22, 2008
D35-D27
D26-D18
D17-D9
D8-D0
A
D
A
C
B
C
B
D
C
A
D
B
(a) x36 INPUT to x36 OUTPUT
(b) x36 INPUT to x18 OUTPUT - BIG-ENDIAN
(c) x36 INPUT to x18 OUTPUT - LITTLE-ENDIAN
(d) x36 INPUT to x9 OUTPUT - BIG-ENDIAN
Write to FIFO
Read from FIFO
1st: Read from FIFO
BE
BM
IW
OW
BYTE ORDER ON INPUT PORT:
2nd: Read from FIFO
3rd: Read from FIFO
4th: Read from FIFO
1st: Read from FIFO
2nd: Read from FIFO
D
C
(e) x36 INPUT to x9 OUTPUT - LITTLE-ENDIAN
1st: Read from FIFO
A
B
2nd: Read from FIFO
3rd: Read from FIFO
4th: Read from FIFO
4667 drw08
BYTE ORDER ON OUTPUT PORT:
L
H
L
H
L
H
L
H
L
H
X
L
BE
BM
IW
OW
BE
BM
IW
OW
BE
BM
IW
OW
BE
BM
IW
OW
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Q35-Q27
Q26-Q18
Q17-Q9
Q8-Q0
Figure 4. Bus-Matching Byte Arrangement