Transcription of DS2502 1Kb Add-Only Memory - Maxim Integrated
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DS2502 1Kb Add-Only Memory - Maxim Integrated
DS2502 . 1Kb Add-Only Memory BENEFITS AND FEATURES PIN ASSIGNMENT. Easily Add Traceability and Relevant Information to Any TO-92 NC 1 8 NC. Individual System o 1k-Bit EPROM with Page-Level Write Protection DS2502 NC 2 7 NC. and Guaranteed Unique 64-Bit ROM ID Chip for DATA 3 6 NC. Absolute Traceability GND 4 5 NC. o 1024 Bits Electrically Programmable Read Only Memory (EPROM). o Unique, Factory-Lasered and Tested 8-PIN SO (150 MIL). 64-Bit Registration Number (8-Bit Family Code + TSOC PACKAGE. 48-Bit Serial Number + 8-Bit CRC Tester). o EPROM Partitioned into Four 256-Bit Pages for GND 1 6 NC. Randomly Accessing Packetized Data DATA 2 5 NC. o Each Memory Page Can Be Permanently Write- NC 3 4 NC. Protected to Prevent Tampering TOP VIEW. o Device is an Add Only Memory Where Additional NC. GND. DATA. Data Can Be Programmed into EPROM Without SOT-23 Package Disturbing Existing Data Top View o Architecture Allows Software to Patch Data by 3. Superseding an Old Page in Favor of a Newly Programmed Page 09rr o 8-Bit Family Code Specifies DS2502 1 2 3.
The next 4 bytes of the EPROM Status Memory contain the Page Address Redirection Bytes, which indicate if one or more of the pages of data in the 102bit EPROM section have been invalidated and 4-redirected to the page address contained in the appropriate redirection byte. The hardware of the DS2502
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