M27C322 datasheet(9/24 Pages) STMICROELECTRONICS

Part #	M27C322

Description	32 Mbit (2Mb x16) UV EPROM and OTP EPROM

PDF	24 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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9 / 24 page

M27C322

Device operation

9/24

Figure 3.

Programming Flowchart

2.7

Program Inhibit

Programming of multiple M27C322s in parallel with different data is also easily

accomplished. Except for E, all like inputs including GVPP of the parallel M27C322 may be

common. A TTL low level pulse applied to a M27C322's E input and VPP at 12V, will

program that M27C322. A high level E input inhibits the other M27C322s 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.

AI02206

n = 0

Last

Addr

VERIFY

E = 50

µs Pulse

++n

= 25

++ Addr

VCC = 6.25V, VPP = 12V

FAIL

CHECK ALL WORDS

1st: VCC = 6V

2nd: VCC = 4.2V

YES

SET MARGIN MODE

RESET MARGIN MODE

M27C322 Datasheet(PDF) 9 Page - STMicroelectronics