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参数资料
| 型号： | A3P-L67201V-55 |
| 厂商： | ATMEL WIRELESS MICROCONTROLLERS |
| 元件分类： | FIFO |
| 英文描述： | 512 X 9 OTHER FIFO, 55 ns, PDIP28 |
| 封装： | 0.300 INCH, PLASTIC, DIP-28 |
| 文件页数： | 12/16页 |
| 文件大小： | 146K |
| 代理商： | A3P-L67201V-55 |
L 67201/L 67202
MATRA MHS
Rev. C (10/11/95)
5
Functional Description
Operating Modes
Single Device Mode
A single L 67201/202 may be used when the application
requirements are for 512/1024 words or less. The
L 67201/202 is 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).
Figure 2. Block Diagram of Single 512
× 9 and 1024 × 9.
(HALF–FULL FLAG)
WRITE
(W)(R)
READ
DATAIN
9
(I)
DATAOUT
9
Q
FULL FLAG
RESET
(FF)
(RS)
EMPTY FLAG
RETRANSMIT
(EF)
(RT)
EXPANSION IN (XI)
HF
L
67201
67202
Width Expansion Mode
Word width may be increased simply by connecting the
corresponding input control signals of multiple devices.
Status flags (EF, FF and HF) can be detected from any one
device. Figure 3 demonstrates an 18-bit word width by
using two L 67201/202. Any word width can be attained
by adding additional L 67201/202.
Figure 3. Block Diagram of 512 / 1024
× 18 FIFO Memory Used in Width Expansion Mode.
L
67201/202
XI
L
67201/202
XI
(W)
WRITE
(FF)
FULL FLAG
RESET
(R) READ
(EF) EMPTY FLAG
(RT) RETRANSMIT
HF
9
18
(RS)
9
18
9
DATAIN (I)
9
HF
(Q) DATAOUT
Note :
3. Flag detection is accomplished by monitoring the FF, EF and the HF signals on either (any) device used in the width
expansion configuration. Do not connect any output control signals together.
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