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参数资料
| 型号： | M27V256-100B6TR |
| 厂商： | 意法半导体 |
| 英文描述： | 256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| 中文描述： | 256千位的32KB × 8低压紫外线可擦写可编程只读存储器和OTP存储器 |
| 文件页数： | 14/15页 |
| 文件大小： | 103K |
| 代理商： | M27V256-100B6TR |
M27V256
8/15
PRESTO II Programming Algorithm
PRESTO II Programming Algorithm allows to pro-
gram the whole array with a guaranteed margin, in
a typical time of 3.5 seconds. Programming with
PRESTO II involves the application of a sequence
of 100
s program pulses to each byte until a cor-
rect verify occurs (see Figure 7). During program-
ming and verify operation, a MARGIN MODE
circuit is automatically activated in order to guar-
antee that each cell is programmed with enough
margin. No overprogram pulse is applied since the
verify in MARGIN MODE at VCC much higher than
3.6V provides necessary margin to each pro-
grammed cell.
Program Inhibit
Programming of multiple M27V256s in parallel
with different data is also easily accomplished. Ex-
cept for E, all like inputs including G of the parallel
M27V256 may be common. A TTL low level pulse
applied to a M27V256’s E input, with VPP at 12.75
V, will program that M27V256. A high level E input
inhibits the other M27V256s 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 G
at VIL, E at VIH,VPP at 12.75V and VCC at 6.25V.
Figure 6. rogramming and Verify Modes AC Waveforms
tAVEL
VALID
AI00759
A0-A14
Q0-Q7
VPP
VCC
G
DATA IN
DATA OUT
E
tQVEL
tVPHEL
tVCHEL
tEHQX
tELEH
tGLQV
tQXGL
tGHQZ
tGHAX
PROGRAM
VERIFY
Figure 7. Programming Flowchart
AI00760B
n= 0
Last
Addr
VERIFY
E = 100
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| M27V256-100F1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256-100F6TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256-100K1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256-100K6TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
| M27V256-100N1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM |
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