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CAT28C64BJI-12T 数据表(PDF) 9 Page - Catalyst Semiconductor

部件名 CAT28C64BJI-12T
功能描述  64K-Bit CMOS PARALLEL E2PROM
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制造商  CATALYST [Catalyst Semiconductor]
网页  http://www.catalyst-semiconductor.com
标志 CATALYST - Catalyst Semiconductor

CAT28C64BJI-12T 数据表(HTML) 9 Page - Catalyst Semiconductor

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CAT28C64B
9
Doc. No. 25006-0A 2/98 P-1
WE
CE
OE
I/O6
tOEH
tOE
tOES
tWC
(1)
(1)
ADDRESS
CE
WE
OE
I/O7
DIN = X
DOUT = X
DOUT = X
tOE
tOEH
tWC
tOES
DATA Polling
DATA polling is provided to indicate the completion of
write cycle. Once a byte write or page write cycle is
initiated, attempting to read the last byte written will
output the complement of that data on I/O7 (I/O0–I/O6
are indeterminate) until the programming cycle is com-
plete. Upon completion of the self-timed write cycle, all
I/O’s will output true data during a read cycle.
Toggle Bit
In addition to the DATA Polling feature, the device offers
an additional method for determining the completion of
a write cycle. While a write cycle is in progress, reading
data from the device will result in I/O6 toggling between
one and zero. However, once the write is complete, I/O6
stops toggling and valid data can be read from the
device.
Figure 7. DATA Polling
28C64B F10
Figure 8. Toggle Bit
28C64B F11
Note:
(1)
Beginning and ending state of I/O6 is indeterminate.


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