參數(shù)資料
型號(hào)： M27C405-100B1TR
廠商： 意法半導(dǎo)體
英文描述： 4 Mbit 512Kb x 8 OTP EPROM
中文描述： 4兆位× 8檢察官辦公室512KB的存儲(chǔ)器
文件頁(yè)數(shù)： 10/15頁(yè)
文件大小： 99K
代理商： M27C405-100B1TR
Warning: compatibility with FLASH Memory
Compatibilityissues may arise when replacingthe
compatibleSingle Supply4 MegabitFLASHMem-
ory (the M29F040)by the M27C405.
The V
PP
pin of the M27C405 corresponds to the
”W”pinoftheM29F040.TheM27C405V
PP
pincan
withstandvoltagesup to 12.75V,whilethe ”W”pin
oftheM29F040is anormalcontrolsignalinputand
may be damaged if a high voltage is applied;
specialprecautionsmust be taken whenprogram-
ming in-circuit.
However if an already programmed M27C405 is
used,thiscanbe directlyputin placeof theFLASH
MemoryastheV
PP
input,whennotinprogramming
mode, is set to V
CC
or V
SS
.
Changes to PRESTO II.
The duration of the pro-
gramming pulse is reduced to 20
μ
s, making the
programming time of the M27C405 comparable
with the counterpartFLASHMemory.
ElectronicSignature
The Electronic Signature (ES) mode allows the
readingout of a binarycode froman OTPEPROM
that will identify its manufacturer and type. this
mode is intended for use by programming equip-
ment to automaticallymatch the device to be pro-
grammed with its corresponding programming
algorithm.Thismodeisfunctionalinthe25
°
C
±
5
°
C
ambient temperaturerange that is required when
programming the M27C405. To activate the ES
mode, the programming equipment must force
11.5Vto 12.5Von addresslineA9 of theM27C405
withV
PP
=V
CC
=5V.Twoidentifierbytesmaythenbe
sequenced from the device outputs by toggling
address line A0 from V
IL
to V
IH
. All other address
lines must be held at V
IL
during Electronic Signa-
ture mode. Byte 0 (A0=V
IL
) represents the manu-
facturer code and byte 1 (A0=V
IH
) the device
identifier code. For the STMicroelectronics
M27C405, these two identifier bytes are given in
Table 4 and can be read-outon outputsQ0 to Q7.
10/15
M27C405
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M27C512 90F6 制造商:ST(SGS) 功能描述:
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