WE128K32P-200H1IA(2006) Ver la hoja de datos (PDF) - White Electronic Designs => Micro Semi
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WE128K32P-200H1IA
(Rev.:2006)
(Rev.:2006)
White Electronic Designs => Micro Semi
WE128K32P-200H1IA Datasheet PDF : 14 Pages
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White Electronic Designs
WE128K32-XXX
PAGE WRITE OPERATION
The WE128K32-XXX has a page write operation that
allows one to 128 bytes of data to be written into the device
and consecutively loads during the internal programming
period. Successive bytes may be loaded in the same
manner after the first data byte has been loaded. An
internal timer begins a time out operation at each write
cycle. If another write cycle is completed within 150µs
or less, a new time out period begins. Each write cycle
restarts the delay period. The write cycles can be continued
as long as the interval is less than the time out period.
The usual procedure is to increment the least significant
address lines from A0 through A6 at each write cycle. In
this manner a page of up to 128 bytes can be loaded in
to the EEPROM in a burst mode before beginning the
relatively long interval programming cycle.
After the 150µs time out is completed, the EEPROM
begins an internal write cycle. During this cycle the entire
page of bytes will be written at the same time. The internal
programming cycle is the same regardless of the number
of bytes accessed.
PAGE WRITE CHARACTERISTICS
(VCC = 5.0V, VSS = 0V, TA = -55°C to +125°C)
Page Mode Write Characteristics
Symbol
Unit
Parameter
Min Max
Write Cycle Time, TYP = 6ms
tWC
10 ms
Address Set-up Time
tAS
0
ns
Address Hold Time (1)
tAH 100
ns
Data Set-up Time
tDS
50
ns
Data Hold Time
tDH
10
ns
Write Pulse Width
tWP 100
ns
Byte Load Cycle Time
tBLC
150 µs
Write Pulse Width High
tWPH
50
ns
1. Page address must remain valid for duration of write cycle.
FIGURE 9 – PAGE MODE WRITE WAVEFORMS
OE#
CS#
WE#
ADDRESS
DATA
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
March 2006
Rev. 10
8
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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