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AT29BV040A-25TC Datasheet(PDF) 9 Page - ATMEL Corporation |
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AT29BV040A-25TC Datasheet(HTML) 9 Page - ATMEL Corporation |
9 / 14 page 9 AT29BV040A 0383G–FLASH–5/03 Software Protected Program Waveform Notes: 1. OE must be high when WE and CE are both low. 2. A8 through A18 must specify the sector address during each high to low transition of WE (or CE) after the software code has been entered. 3. All bytes that are not loaded within the sector being programmed will be indeterminate. Programming Algorithm(1) Notes: 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. Data Protect state will be re-activated at end of program cycle. 3. 256 bytes of data MUST BE loaded. Program Cycle Characteristics Symbol Parameter Min Max Units t WC Write Cycle Time 20 ms tAS Address Set-up Time 10 ns t AH Address Hold Time 100 ns t DS Data Set-up Time 100 ns tDH Data Hold Time 10 ns t WP Write Pulse Width 200 ns t BLC Byte Load Cycle Time 150 µs tWPH Write Pulse Width High 200 ns LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA A0 TO ADDRESS 5555 LOAD DATA TO SECTOR (256 BYTES)(3) WRITES ENABLED ENTER DATA PROTECT STATE(2) |
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