Device description

M27W101

10/23

Figure 5.

Programming Flowchart

2.7

Program Inhibit

Programming of multiple M27W101s in parallel with different data is also easily

accomplished. Except for E, all like inputs including G of the parallel M27W101 may be

12.75V, will program that M27W101. A high level E input inhibits the other M27W101s 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 M27W101. To activate

the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of

AI00715D

n = 0

Last

Addr

VERIFY

P = 100

µs Pulse

++n

= 25

++ Addr

VCC = 6.25V, VPP = 12.75V

FAIL

CHECK ALL BYTES

1st: VCC = 5V

2nd: VCC = 2.7V

YES

NO

YES

NO

YES

NO