M27C516 Просмотр технического описания (PDF) - STMicroelectronics

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M27C516

512 Kbit (32Kb x16) OTP EPROM

STMicroelectronics 

M27C516

Electronic Signature

The Electronic Signature (ES) 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 to

automatically match the device to be programmed

with its corresponding programming algorithm.

The ES mode is functional in the 25°C ± 5°C am-

bient temperature range that is required when pro-

gramming the M27C516. To activate the ES

mode, the programming equipment must force

11.5V to 12.5V on address line A9 of the

M27C516. Two identifier bytes may then be se-

quenced from the device outputs by toggling ad-

dress line A0 from VIL to VIH. All other address

lines must be held at VIL during Electronic Signa-

ture mode. Byte 0 (A0 = VIL) represents the man-

ufacturer code and byte 1 (A0 = VIH) the device

identifier code. For the STMicroelectronics

M27C516, these two identifier bytes are given in

Table 4 and can be read-out on outputs Q7 to Q0.

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