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參數(shù)資料
| 型號： | M27V201-200XN1TR |
| 廠商： | 意法半導體 |
| 英文描述： | 2 Mbit 256Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| 中文描述： | 2兆位的256Kb × 8低壓紫外線可擦寫可編程只讀存儲器和OTP存儲器 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 103K |
| 代理商： | M27V201-200XN1TR |
M27V201
8/15
PRESTO II Programming Algorithm
PRESTO II Programming Algorithm allows the
whole array to be programmed with a guaranteed
margin, in a typical time of 26.5 seconds. Pro-
gramming with PRESTO II consists of applying a
sequence of 100
μ
s program pulses to each byte
until a correct verify occurs (see Figure 7). During
programming and verify operation, a MARGIN
MODE circuit is automatically activated in order to
guarantee that each cell is programmed with
enough margin. No overprogram pulse is applied
since the verify in MARGIN MODE at V
CC
much
higher than 3.6V provides thenecessary margin to
each programmed cell.
Program Inhibit
Programming of multiple M27V201s in parallel
with different data is also easily accomplished. Ex-
cept for E, all likeinputs including G of the parallel
M27V201 may be common. A TTL low level pulse
applied to a M27V201’s P input, with E low and
V
PP
at 12.75V, will program that M27V201. A high
level E input inhibits the other M27V201s from be-
ing programmed.
Program Verify
A verify (read) should be performed on the pro-
grammed bits to determine that theywere correct-
ly programmed. The verify is accomplished with E
and G at V
IL
, P at V
IH
, V
PP
at 12.75V and V
CC
at
6.25V.
Figure 6. Programming and Verify Modes AC Waveforms
tAVPL
VALID
AI00720
A0-A17
Q0-Q7
VPP
VCC
P
G
DATA IN
DATA OUT
E
tQVPL
tVPHPL
tVCHPL
tPHQX
tPLPH
tGLQV
tQXGL
tELPL
tGHQZ
tGHAX
PROGRAM
VERIFY
Figure 7. Programming Flowchart
AI00715C
n = 0
Last
Addr
VERIFY
P = 100
μ
s Pulse
++n
= 25
++ Addr
VCC= 6.25V, VPP= 12.75V
FAIL
CHECK ALL BYTES
1st: VCC= 6V
2nd: VCC= 4.2V
YES
NO
YES
NO
YES
NO
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M27V201-200XN6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Mbit 256Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256-100B1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256-100B6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256-100F1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
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