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CAT28C64BGI-15T Datasheet(PDF) 9 Page - ON Semiconductor |
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CAT28C64BGI-15T Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 13 page CAT28C64B 9 Doc. No. MD-1011, Rev. I © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice WE CE OE I/O6 tOEH tOE tOES tWC (1) (1) 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 Figure 8. Toggle Bit Note: (1) Beginning and ending state of I/O6 is indeterminate. ADDRESS CE WE OE I/O7 DIN = X DOUT = X DOUT = X tOE tOEH tWC tOES |
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