AT27BV040-12VI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

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AT27BV040-12VI

4-Megabit (512K x 8) Unregulated Battery-Voltage™ High-Speed OTP EPROM

Atmel Corporation 

AT27BV040

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 verifica-

tion/reprogramming loop is executed for each address. In

the event a byte fails to pass verification, up to 10 succes-

sive 100 µs pulses are applied with a verification 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.

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