180NQ045R ATMEL Corporation, 180NQ045R Datasheet - Page 5

• Manufacturer Part Number: 180NQ045R
• Description: 45V 180A Schottky DISCR. (R) Diode in a D-67 HALF-Pak package
• Manufacturer: ATMEL Corporation

Functional Description
Operating Modes
Single Device Mode
A single M67204E may be used when the application
requirements are for 4096 words or less. The M67204E is
Width Expansion Mode
Word width may be increased simply by connecting the
corresponding input control signals of multiple devices.
Rev. F – June 30, 1999
Figure 2. Block Diagram of Single 4K 9 FIFO.
Figure 3. Block Diagram of 4096 18 FIFO Memory Used in Width Expansion Mode.
Note : 3. Flag detection is accomplished by monitoring the FF, EF and the HF signals on either (any) device used in the width
WRITE
FULL FLAG
RESET
DATA
IN
expansion configuration. Do not connect any output control signals together.
(I)
18
(FF)
(W)
DATA
WRITE
(RS)
9
(HALF–FULL FLAG)
FULL FLAG
RESET
IN
EXPANSION IN (XI)
67204E
M
(I)
9
(W)
(FF)
(RS)
HF
XI
9
67204E
M
HF
in a Single Device Configuration when the Expansion In
(XI) control input is grounded (see Figure 2). In this mode
the Half-Full Flag (HF), which is an active low output, is
shared with Expansion Out (XO).
Status flags (EF, FF and HF) can be detected from any
device. Figure 3 demonstrates an 18-bit word width by
using two M67204E. Any word width can be attained by
adding additional M67204E.
9
(EF)
(RT)
(R)
(Q)
EMPTY FLAG
RETRANSMIT
9
67204E
M
HF
DATA
XI
READ
OUT
9
(RT) RETRANSMIT
(EF) EMPTY FLAG
M67204E
18
(R) READ
(Q) DATA
OUT
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