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M27W801-100K6TR датащи(PDF) 9 Page - STMicroelectronics

номер детали M27W801-100K6TR
подробное описание детали  8 Mbit 1Mb x8 Low Voltage UV EPROM and OTP EPROM
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M27W801-100K6TR датащи(HTML) 9 Page - STMicroelectronics

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M27W801
PRESTO IIB Programming Algorithm
PRESTO IIB Programming Algorithm allows the
whole array to be programmed with a guaranteed
margin, in a typical time of 52.5 seconds. This can
be achieved with STMicroelectronics M27W801
due to several design innovations to improve pro-
gramming efficiency and to provide adequate mar-
gin for reliability. Before starting the programming
the internal MARGIN MODE circuit must be set in
order to guarantee that each cell is programmed
with enough margin. Then a sequence of 50
µs
program pulses are applied to each byte until a
correct verify occurs (see Figure 8). No overpro-
gram pulses are applied since the verify in MAR-
GIN MODE at VCC much higher than 3.6V,
provides the necessary margin.
Program Inhibit
Programming of multiple M27W801s in parallel
with different data is also easily accomplished. Ex-
cept for E, all like inputs including GVPP of the par-
allel M27W801 may be common. A TTL low level
pulse applied to a M27W801’s E input, with VPP at
12.75V, will program that M27W801. A high level
E input inhibits the other M27W801s from being
programmed.
Program Verify
A verify (read) should be performed on the pro-
grammed bits to determine that they were correct-
ly programmed. The verify is accomplished with G
at VIL. Data should be verified with tELQV after the
falling edge of E.
Figure 7. Programming and Verify Modes AC Waveforms
tAVEL
VALID
AI01270
A0-A19
Q0-Q7
VCC
DATA IN
DATA OUT
E
tQVEL
tVCHEL
tVPHEL
tEHQX
tEHVPX
tELQV
tELEH
tEHQZ
tVPLEL
PROGRAM
VERIFY
GVPP
tEHAX
Figure 8. Programming Flowchart
AI01271C
n= 0
Last
Addr
VERIFY
E= 50
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
SET MARGIN MODE
RESET MARGIN MODE


Аналогичный номер детали - M27W801-100K6TR

производительномер деталидатащиподробное описание детали
logo
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Аналогичное описание - M27W801-100K6TR

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