WE128K32P-250G2TQ データシートの表示（PDF） - White Electronic Designs Corporation
部品番号
コンポーネント説明
メーカー
WE128K32P-250G2TQ Datasheet PDF : 14 Pages
| |||
White Electronic Designs
WE128K32-XXX
WRITE
A write cycle is initiated when OE# is high and a low pulse
is on WE# or CS# with CS# or WE# low. The address
is latched on the falling edge of CS# or WE# whichever
occurs last. The data is latched by the rising edge of CS#
or WE#, whichever occurs first. A byte write operation will
automatically continue to completion.
write cycle timing
Figures 5 and 6 show the write cycle timing relationships.
A write cycle begins with address application, write enable
and chip select. Chip select is accomplished by placing
the CS# line low. Write enable consists of setting the WE#
line low. The write cycle begins when the last of either CS#
or WE# goes low.
The WE# line transition from high to low also initiates
an internal 150 µsec delay timer to permit page mode
operation. Each subsequent WE# transition from high to
low that occurs before the completion of the 150 µsec time
out will restart the timer from zero. The operation of the
timer is the same as a retriggerable one-shot.
AC WRITE CHARACTERISTICS
VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C
Write Cycle Parameter
Symbol Min Max Unit
Write Cycle Time, TYP = 6ms
Address Set-up Time
Write Pulse Width (WE# or CS#)
Chip Select Set-up Time
Address Hold Time
Data Hold Time
Chip Select Hold Time
Data Set-up Time
Output Enable Set-up Time
Output Enable Hold Time
Write Pulse Width High
tWC
10 ms
tAS
0
ns
tWP
100
ns
tCS
0
ns
tAH
100
ns
tDH
10
ns
tCSH
0
ns
tDS
50
ns
tOES
0
ns
tOEH
0
ns
tWPH
50
ns
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
March 2006
Rev. 10
4
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
Share Link: 