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AT28C010E-15PU Datasheet(PDF) 10 Page - ATMEL Corporation |
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AT28C010E-15PU Datasheet(HTML) 10 Page - ATMEL Corporation |
10 / 17 page 10 0353G–PEEPR–10/06 AT28C010 19. Software Data Protection Enable Algorithm (1) Notes: 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. Write Protect state will be activated at end of write even if no other data is loaded. 3. Write Protect state will be deactivated at end of write period even if no other data is loaded. 4. 1 to 128 bytes of data are loaded. LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA A0 TO ADDRESS 5555 LOAD DATA XX TO ANY ADDRESS(4) LOAD LAST BYTE TO LAST ADDRESS ENTER DATA PROTECT STATE WRITES ENABLED(2) 20. Software Data Protection Disable Algorithm (1) LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 80 TO ADDRESS 5555 LOAD DATA AA TO ADDRESS 5555 LOAD DATA 20 TO ADDRESS 5555 LOAD DATA XX TO ANY ADDRESS(4) LOAD LAST BYTE TO LAST ADDRESS LOAD DATA 55 TO ADDRESS 2AAA EXIT DATA PROTECT STATE(3) 21. Software Protected Write Cycle Waveforms(1)(2)(3) Notes: 1. A0 through A14 must conform to the addressing sequence for the first 3 bytes as shown above. 2. After the command sequence has been issued and a page write operation follows, the page address inputs (A7 - A16) must be the same for each high to low transition of WE (or CE). 3. OE must be high only when WE and CE are both low. |
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