Device description

M27C801

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Figure 4.

Programming flowchart

2.7

Program Inhibit

Programming of multiple M27C801s in parallel with different data is also easily

program that M27C801. A high level E input inhibits the other M27C801s from being

programmed.

2.8

Program Verify

A Verify (Read) should be performed on the programmed bits to determine that they were

2.9

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

ambient temperature range that is required when programming the M27C801. To activate

AI01271B

n = 0

Last

Addr

VERIFY

E = 50

µs Pulse

++n

= 25

++ Addr

VCC = 6.25V, VPP = 12.75V

FAIL

CHECK ALL BYTES

1st: VCC = 6V

2nd: VCC = 4.2V

YES

NO

YES

NO

YES

NO

SET MARGIN MODE

RESET MARGIN MODE