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AT27C400-15 Datasheet(PDF) 9 Page - ATMEL Corporation |
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AT27C400-15 Datasheet(HTML) 9 Page - ATMEL Corporation |
9 / 10 page AT27C400 9 Rapid Programming Algorithm A 50 µs CE pulse width is used to program. The address is set to the first location. VCC is raised to 6.5V and BYTE/VPP is raised to 13.0V. Each address is first programmed with one 50 µs CE pulse without verification. Then a verification/ reprogramming loop is executed for each address. In the event a word fails to pass verification, up to 10 successive 50 µs pulses are applied with a verification after each pulse. If the word fails to verify after 10 pulses have been applied, the part is considered failed. After the word verifies properly, the next address is selected until all have been checked. VPP is then lowered to 5.0V and VCC to 5.0V. All words are read again and compared with the original data to determine if the device passes or fails. |
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