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參數(shù)資料
| 型號： | 27C4001 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 4 Mbit 512Kb x 8 UV EPROM and OTP EPROM |
| 中文描述： | 4兆位× 8紫外線512KB的存儲器和OTP存儲器 |
| 文件頁數(shù)： | 8/17頁 |
| 文件大?。?/td> | 158K |
| 代理商： | 27C4001 |
M27C4001
8/17
PRESTO II Programming Algorithm
PRESTO II Programming Algorithm allows the
whole array to be programmed with a guaranteed
margin, in a typical time of 52.5 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 provides the
necessary margin to each programmed cell.
Program Inhibit
Programming of multiple M27C4001s in parallel
with different data is also easily accomplished. Ex-
cept for E, all like inputs including G of the parallel
M27C4001 may be common. A TTL low level
pulse applied to a M27C4001’s E input, with V
PP
at 12.75V, will program that M27C4001. A high
level E input inhibits the other M27C4001s 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 V
IL
, E at V
IH
, V
PP
at 12.75V and V
CC
at 6.25V.
Figure 6. Programming and Verify Modes AC Waveforms
tAVPL
VALID
AI00725
A0-A18
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
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 27C4002 | 4 Mbit 256Kb x16 UV EPROM and OTP EPROM |
| 27C512-120 | 512 Kbit 64Kb x8 UV EPROM and OTP EPROM |
| 27C512 | 512 Kbit 64Kb x8 UV EPROM and OTP EPROM |
| 27C512TRPDB-12 | 512K (64K x 8-Bit) OTP EPROM |
| 27C512TRPDB-15 | 512K (64K x 8-Bit) OTP EPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 27C4002 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit 256Kb x16 UV EPROM and OTP EPROM |
| 27C4096 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:4M-BIT [512K x 8/256K x 16] CMOS EPROM |
| 27C4096-10 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:4M-BIT [512K x 8/256K x 16] CMOS EPROM |
| 27C4096-12 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:4M-BIT [512K x 8/256K x 16] CMOS EPROM |
| 27C4096-15 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:4M-BIT [512K x 8/256K x 16] CMOS EPROM |
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