參數(shù)資料
型號(hào)： AL440B
廠商： Electronic Theatre Controls, Inc.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:128; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:24; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No
中文描述： 4Mbits（為512k × 8位）FIFO存儲(chǔ)器
文件頁(yè)數(shù)： 12/33頁(yè)
文件大?。?/td> 672K
代理商： AL440B
AL440B
AL440B
November 28, 2001
12
11.4 FIFO Write Operation
In the FIFO write operation, 8 bits of write data are input in synchronization with the WCK clock.
The FIFO write operation is determined by WRST, WE, IE and WCK signals and the combination of
these signals could produce different write result. The /PLRTY signal determines the activated
polarity of these control signals. The following tables describe the WRITE functions under different
operating polarities.
/PLRTY = VDD
WRST
WE
IE
WCK Function
L
-
-
↑
Write reset.
The write pointer is reset to zero.
H
L
L
↑
Normal Write operation.
H
L
H
↑
Write address pointer increases, but no new data will be
written to memory. Old data is retained in memory.
(Write mask function)
H
H
-
↑
Write operation stopped. Write address pointer is also stopped.
/PLRTY = GND
WRST
H
WE
-
IE
-
WCK Function
↑
Write reset.
The write pointer is reset to zero.
↑
Normal Write operation.
↑
Write address pointer increases, but no new data will be
written to memory. Old data is retained in memory.
(Write mask function)
↑
Write operation stopped. Write address pointer is also stopped.
L
L
H
H
H
L
L
L
-
11.5 FIFO Read Operation
In the FIFO read operation, 8 bits of read data are available in synchronization with the RCK clock.
The access time is stipulated from the rising edge of the RCK clock. The FIFO read operation is
determined by RRST, RE, OE and RCK signals, so the combination of these signals could produce
varying read results. The /PLRTY signal could decide the activated polarity of these control signals.
The following tables describe the READ functions under different operating polarities.
/PLRTY = VDD
RRST
RE
OE
RCK Function
L
L
L
↑
Read reset. The read pointer is reset to zero.
Data in the address 0 is output.
L
L
H
↑
Read reset. The read pointer is reset to zero.
Output is high impedance.
L
H
L
↑
Read address pointer is stopped. Output data is held. Read
address pointer will be reset to zero and data in the address 0 is
output after RE goes low.
相關(guān)PDF資料
PDF描述
AL440B-12 Circular Connector; No. of Contacts:56; Series:MS27497; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:24; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:24-4 RoHS Compliant: No
ALC202 Circular Connector; No. of Contacts:100; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:22-35 RoHS Compliant: No
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