EN27LV512200P 查看數據表（PDF） - Eon Silicon Solution Inc.

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EN27LV512200P

512KBIT EPROM (64K x 8)

Eon Silicon Solution Inc. 

EN27LV512 / EN27LV512B

PROGRAM INHIBIT MODE

Programming of multiple EN27LV512 / EN27LV512B in parallel with different data is also

easily accomplished by using the Program Inhibit Mode. Except for CE , all like inputs of the

parallel EN27LV512 / EN27LV512B may be common. A TTL low-level program pulse applied

to an EN27LV512 / EN27LV512B CE input with OE /VPP = 12.75 ± 0.25V will program that

EN27LV512 / EN27LV512B. A high-level CE input inhibits the other EN27LV512 /

EN27LV512B 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 OE /VPP and CE at VIL. Data

should be verified at tDV after the falling edge of CE .

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 EN27LV512 / EN27LV512B.

To activate this mode, the programming equipment must force 12.0 V ± 0.5V on address line A9

of the EN27LV512 / EN27LV512B. Two identifier bytes may then be sequenced from the device

outputs by toggling address line A0 from VIL to VIH, when A1 = VIH. All other address lines must

be held at VIL during Auto Product Identification mode.

Byte 0 (A0 = VIL) represents the manufacturer code, and byte 1 (A0 = VIH), the device code. For

the EN27LV512 / EN27LV512B, 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 bit. When A1 = VIL, the EN27LV512 / EN27LV512B will read out the binary

code of 7F, continuation code, to signify the unavailability of manufacturer ID codes.

4800 Great America Parkway Ste 202

Santa Clara, CA. 95054

4

Preliminary

Tel: 408-235-8680

Fax: 408-235-8685

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