14
IDT72V3613 3.3V, CMOS CLOCKED FIFO WITH
BUS-MATCHING AND BYTE SWAPPING 64 x 36 COMMERCIAL TEMPERATURE RANGE
Figure 4. Byte Swapping for FIFO Reads (Long-Word Size Example)
A35 ⎯ A27 A26 ⎯ A18 A17 ⎯ A9 A8 ⎯ A0
B35 ⎯ B27 B26 ⎯ B18 B17 ⎯ B9 B8 ⎯ B0
A
A
A
D
A
C
A
B
B
B
C
B
D
B
AB
C
C
C
B
C
A
C
D
D
D
D
A
D
B
D
C
(a) NO SWAP
(b) BYTE SWAP
(c) WORD SWAP
(d) BYTE-WORD SWAP
L L
SW1 SW0
SW1 SW0
SW1 SW0
SW1 SW0
L L
L H
H L
H H
4661 fi
03
A35 ⎯ A27 A26 ⎯ A18 A17 ⎯ A9 A8 ⎯ A0
B35 ⎯ B27 B26 ⎯ B18 B17 ⎯ B9 B8 ⎯ B0
A35 ⎯ A27 A26 ⎯ A18 A17 ⎯ A9 A8 ⎯ A0
B35 ⎯ B27 B26 ⎯ B18 B17 ⎯ B9 B8 ⎯ B0
A35 ⎯ A27 A26 ⎯ A18 A17 ⎯ A9 A8 ⎯ A0
B35 ⎯ B27 B26 ⎯ B18 B17 ⎯ B9 B8 ⎯ B0
