AT27C512R View Datasheet(PDF) - Atmel Corporation

Part Name

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AT27C512R

512K (64K x 8) OTP EPROM

Atmel Corporation 

AT27C512R

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 OE/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 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. OE/VPP is then lowered to VIL and VCC to 5.0V. All bytes

are read again and compared with the original data to determine if the device passes or fails.

9

0015O–EPROM–12/07

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