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参数资料
| 型号： | M37481M8T-XXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, 1.78 MM PITCH, SHRINK, PLASTIC, DIP-42 |
| 文件页数： | 49/100页 |
| 文件大小： | 1457K |
| 代理商： | M37481M8T-XXXSP |
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49
MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
The screening temperature is up to 150
°C.
Never expose to 150
°C exceeding 100 hours.
The M37480E8SP/FP, M37481E8SP/FP and
M37481E8SS are not T versions (mountable on
vehicles), so it is impossible to mount them on
vehicles.
The M37481E8SS is for user program
evaluation, so it is impossible to mount it on
vehicles or on user’s mass-production real
machines.
Writing with PROM programmer
Screening (Leave at 150
°C
for 40 hours.) (Note)
Verify test with
PROM programmer
Function check in target device
Note :
FUNCTIONAL DESCRIPTION OF PROM VERSION
Reading
__
To read the PROM, set the CE and OE pins to “L” level, and set
the address signal (A0 to A14). The stored contents will appear to
__
data I/O pins (D0 to D7). When the CE and OE pins are set to “H”
level, the data I/O pins will be put into a floating status.
Writing
__
To write to the PROM, apply “H” to the OE pin and VPP to the VPP
pin to set the program mode. Select addresses to be written to
with address input pins (A0 to A14) and give write data to the data
input pins (D0 to D7) in 8-bit parallel form. In this status, when the
__
CE pin becomes “L”, writing will be started.
Notes on Writing
When using a PROM programmer, specify the address range to
address 400016 to address 7FFF16.
When data is written between address 000016 and address
7FFF16, fill addresses 000016 to 3FFF16 with “FF16”.
Erasing
Data can be erased only on the ceramic package with window
M37481E8SS. To erase data on this chip, use an ultraviolet light
source with a 2537 Angstrom wave length. The minimum radiation
power required for erasing is 15Ws/cm2.
NOTES ON HANDLING
(1) Sunlight and fluorescent light contain wavelengths capable of
erasing data. For use in the read mode, be sure to cover the
transparent window with a seal. (Ceramic package type)
(2) We can supply the seal with which the transparent window is
covered. Be careful not to allow the seal to contact the micro-
computer lead pins. (Ceramic package type)
(3) Before erasing, clean the transparent glass. If the glass is
smeared with greasy hands or paste, ultraviolet light transmis-
sion will be prevented, having a negative effect on erasing
characteristics. (Ceramic package type)
(4) Since a high voltage is used for writing data, care should be
taken not to apply an overvoltage when turning on the power
source.
(5) For the programmable microcomputers (one-time program-
mable version, version shipped in blank), Mitsubishi does not
perform PROM write testing and screening in the assembly
process and subsequent processes. To improve reliability after
writing, perform writing and testing according to the following
operation flow before use.
Fig. 53 Writing and testing for one-time programmable version
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37481M8-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
| M37481M8-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
| M37481MT-088FP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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