M27V322-100B6 データシートの表示（PDF） - STMicroelectronics

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M27V322-100B6

32 Mbit (2Mb ×16) low-voltage UV EPROM and OTP EPROM

STMicroelectronics 

M27V322

Figure 3.

Programming flowchart

VCC = 6.25V, VPP = 12V

SET MARGIN MODE

n=0

NO

++n

= 25

YES

E = 50µs Pulse

NO

VERIFY

YES

++ Addr

FAIL

Last NO

Addr

YES

RESET MARGIN MODE

CHECK ALL WORDS

1st: VCC = 5V

2nd: VCC = 3V

AI03059B

Device operation

2.7

Program Inhibit

Programming of multiple M27V322s in parallel with different data is also easily

accomplished. Except for E, all like inputs including GVPP of the parallel M27V322 may be

common. A TTL low level pulse applied to a M27V322's E input and VPP at 12V, will program

that M27V322. A high level E input inhibits the other M27V322s from being programmed.

2.8

Program Verify

A verify (read) should be performed on the programmed bits to determine that they were

correctly programmed. The verify is accomplished with GVPP at VIL. Data should be verified

with tELQV after the falling edge of E.

2.9

On-Board programming

The M27V322 can be directly programmed in the application circuit. See the relevant

Application Note AN620.

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