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M27C160-50K1TR 数据表(PDF) 10 Page - STMicroelectronics

部件名 M27C160-50K1TR
功能描述  16 Mbit 2Mb x8 or 1Mb x16 UV EPROM and OTP EPROM
Download  19 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M27C160-50K1TR 数据表(HTML) 10 Page - STMicroelectronics

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M27C160
10/19
PRESTO III Programming Algorithm
The PRESTO III Programming Algorithm allows
the whole array to be programed with a guaran-
teed margin in a typical time of 52.5 seconds. Pro-
gramming with PRESTO III consists of applying a
sequence of 50µs program pulses to each word
until a correct verify occurs (see Figure 11). During
programing and verify operation a MARGIN
MODE circuit is automatically activated to guaran-
tee that each cell is programed with enough mar-
gin. No overprogram pulse is applied since the
verify in MARGIN MODE provides the necessary
margin to each programmed cell.
Program Inhibit
Programming of multiple M27C160s in parallel
with different data is also easily accomplished. Ex-
cept for E, all like inputs including G of the parallel
M27C160 may be common. A TTL low level pulse
applied to a M27C160's E input and VPP at 12.5V,
will program that M27C160. A high level E input in-
hibits the other M27C160s from being pro-
grammed.
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 E
at VIH and G at VIL,VPP at 12.5V and VCC at
6.25V.
Figure 10. Programming and Verify Modes AC Waveforms
tAVEL
VALID
AI00744
A0-A19
Q0-Q15
BYTEVPP
VCC
G
DATA IN
DATA OUT
E
tQVEL
tVPHAV
tVCHAV
tEHQX
tELEH
tGLQV
tQXGL
tGHQZ
tGHAX
PROGRAM
VERIFY
Figure 11. Programming Flowchart
AI01044B
n = 0
Last
Addr
VERIFY
E = 50
µs Pulse
++n
= 25
++ Addr
VCC = 6.25V, VPP = 12.5V
FAIL
CHECK ALL WORDS
BYTEVPP =VIH
1st: VCC = 6V
2nd: VCC = 4.2V
YES
NO
YES
NO
YES
NO


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