EN27C512

4800 Great America Parkway Ste 202

Tel: 408-235-8680

Santa Clara, CA. 95054

Fax: 408-235-8685

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PROGRAM INHIBIT MODE

Programming of multiple EN27C512 in parallel with different data is also easily accomplished

by using the Program Inhibit Mode. Except for

may be common. A TTL low-level program pulse applied to an EN27C512

other EN27C512 from being programmed.

PROGRAM VERIFY MODE

Verification should be performed on the programmed bits to determining that they were

correctly programmed. The verification should be performed with

should be verified at

AUTO PRODUCT IDENTIFICATION

The Auto Product Identification mode allows the reading out of a binary code from an EPROM that

will identify its manufacturer and type. This mode is intended for use by programming equipment

for the purpose of automatically matching the device to be programmed with its corresponding

programming algorithm. This mode is functional in the 25

°C ± 5°C ambient temperature range

that is required when programming the EN27C512.

To activate this mode, the programming equipment must force 12.0 V

± 0.5V on address line A9

of the EN27C512. Two identifier bytes may then be sequenced from the device outputs by

the EN27C512, these two identifiers bytes are given in the Mode Select Table. All identifiers for

manufacturer and device codes will possess odd parity, with the MSB (DQ7) defined as the parity

signify the unavailability of manufacturer ID codes.