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CAT28F102N-55T Datasheet(PDF) 10 Page - Catalyst Semiconductor |
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CAT28F102N-55T Datasheet(HTML) 10 Page - Catalyst Semiconductor |
10 / 14 page CAT28F102 10 Doc. No. 25038-0A 2/98 F-1 Note: (1) The algorithm MUST BE FOLLOWED to ensure proper and reliable operation of the device. Figure 7. Chip Erase Algorithm(1) 28F101-07 START ERASURE APPLY VPPH INITIALIZE ADDRESS INITIALIZE PLSCNT = 0 WRITE ERASE SETUP COMMAND WRITE ERASE COMMAND TIME OUT 10ms WRITE ERASE VERIFY COMMAND TIME OUT 6 µs READ DATA FROM DEVICE DATA = FFH? LAST ADDRESS? WRITE READ COMMAND APPLY VPPL ERASURE COMPLETED APPLY VPPL ERASE ERROR INCREMENT ADDRESS INC PLSCNT = 1000 ? NO NO NO YES YES YES PROGRAM ALL BYTES TO 0000H STANDBY VPP RAMPS TO VPPH (OR VPP HARDWIRED) BUS OPERATION COMMAND COMMENTS READ STANDBY WRITE STANDBY ERASE ERASE VERIFY READ INITIALIZE ADDRESS ALL BYTES SHALL BE PROGRAMMED TO 00 BEFORE AN ERASE OPERATION PLSCNT = PULSE COUNT DATA = XX20H WAIT ADDRESS = BYTE TO VERIFY DATA = XXA0H STOPS ERASE OPERATION READ BYTE TO VERIFY ERASURE DATA = 0000H RESETS THE REGISTER FOR READ OPERATION VPP RAMPS TO VPPL (OR VPP HARDWIRED) WRITE WRITE WRITE ERASE WAIT COMPARE OUTPUT TO FF INCREMENT PULSE COUNT DATA = XX20H |
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