lh5496 Sharp Microelectronics of the Americas, lh5496 Datasheet - Page 14

• Manufacturer Part Number: lh5496
• Description: Cmos Fifo
• Manufacturer: Sharp Microelectronics of the Americas

LH5496/96H
OPERATIONAL MODES (cont’d)
Compound Expansion
easily implemented by operating groups of depth
expanded FIFOs in parallel.
Bidirectional Operation
between two systems can be realized by operating
14
A combination of width and depth expansion can be
Applications which require bidirectional data buffering
DATA IN
RS
W
R
D
DEPTH EXPANSION
SYSTEM A
0
- D
LH5496/96H
N-1
BLOCK
EFa
HFa
RTa
FFa
Wa
RS
Ra
Q
0
- Q
Figure 20. Compound FIFO Expansion
8
Figure 21. Bidirectional FIFO Buffer
D
Qa0 - 8
Da0 - 8
9
- D
N-1
DEPTH EXPANSION
LH5496/96H
LH5496/96H
LH5496/96H
BLOCK
XI
XI
D
Q
LH5496/96H devices in parallel but opposite directions.
The Data In pins of a device may be tied to the corre-
sponding Data Out pins of another device operating in the
opposite direction to form a single bidirectional bus inter-
face. Care must be taken to assure that the appropriate
read, write, and flag signals are routed to each system.
Both depth and width expansion may be used in this
configuration.
18
0
- Q
- D
17
N-1
Qb0 - 8
Db0 - 8
Q
0
D
- Q
N-9
DEPTH EXPANSION
N-10
- D
Rb
EFb
HFb
RTb
FFb
SYSTEM B
Wb
RS
LH5496/96H
N-1
BLOCK
Q
0
- Q
CMOS 512
N-1
DATA OUT
9 FIFO
5496-21
5496-20