AT27LV040A View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT27LV040A

4-Megabit (512K x 8) Low Voltage OTP EPROM

Atmel Corporation 

18. Rapid Programming Algorithm

A 100 µs CE pulse width is used to program. The address is set to the first location. VCC is raised

to 6.5V and VPP is raised to 13.0V. Each address is first programmed with one 100 µs CE pulse

without verification. Then a verification/reprogramming loop is executed for each address. In the

event a byte fails to pass verification, up to 10 successive 100 µs pulses are applied with a veri-

fication after each pulse. If the byte fails to verify after 10 pulses have been applied, the part is

considered failed. After the byte 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 bytes are read again and compared

with the original data to determine if the device passes or fails.

10 AT27LV040A

0557D–EPROM–12/07

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