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參數資料
| 型號： | M38C29MCA-XXXHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數： | 54/102頁 |
| 文件大?。?/td> | 1567K |
| 代理商： | M38C29MCA-XXXHP |
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55
38C2 Group (A Version)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
(3) Oscillator concerns
Take care to prevent an oscillator that generates clocks for a micro-
computer operation from being affected by other signals.
Keeping oscillator away from large current signal lines
Install a microcomputer (and especially an oscillator) as far as pos-
sible from signal lines where a current larger than the tolerance of
current value flows.
q Reason
In the system using a microcomputer, there are signal lines for
controlling motors, LEDs, and thermal heads or others. When a
large current flows through those signal lines, strong noise occurs
because of mutual inductance.
Installing oscillator away from signal lines where potential levels
change frequently
Install an oscillator and a connecting pattern of an oscillator away
from signal lines where potential levels change frequently. Also,
do not cross such signal lines over the clock lines or the signal
lines which are sensitive to noise.
q Reason
Signal lines where potential levels change frequently (such as the
CNTR pin signal line) may affect other lines at signal rising edge
or falling edge. If such lines cross over a clock line, clock wave-
forms may be deformed, which causes a microcomputer failure or
a program runaway.
Keeping oscillator away from large current signal lines
Installing oscillator away from signal lines where potential levels
change frequently
CNVSS/VPP
VSS
About 10k
(4) Wiring to VPP pin of flash memory version
Connect an approximately 10 k
resistor to the VPP pin the shortest
possible in series and also to the VSS pin.
Note: Even when a circuit which included an approximately 10 k
resistor is used in the Mask ROM version, the microcomputer
operates correctly.
q Reason
The VPP pin of the flash memory version is the power source input
pin for the built-in flash memory. When programming/erasing in the
built-in flash memory, the impedance of the VPP pin is low to allow the
electric current for writing/erasing flow into the flash memory. Be-
cause of this, noise can enter easily. If noise enters the VPP pin, ab-
normal instruction codes or data are read from the built-in flash
memory, which may cause a program runaway.
Fig. 60 Wiring for the VPP pin of flash memory
Electric Characteristic Differences Between
Mask ROM and Flash memory Version MCUs
There are differences in electric characteristics, operation margin,
noise immunity, and noise radiation between the mask ROM and
flash memory version MCUs due to the difference in the manufactur-
ing processes.
When manufacturing an application system with the flash memory
version and then switching to use of the mask ROM version, please
perform sufficient evaluations for the commercial samples of the Mask
ROM version.
Oscillation Circuit Constant
(1) Determine an oscillation circuit constant after consulting the os-
cillator manufacturer about the matching characteristic evalua-
tion.
(2) Since oscillation circuit constants may be differences between
the flash memory version and the mask ROM version, evaluate
them, respectively.
XIN
XOUT
VSS
M
Microcomputer
Mutual inductance
Large
current
GND
XIN
XOUT
VSS
CNTR
Do not cross
N.G.
Fig. 59 Wiring for a large current signal line/Writing of signal
lines where potential levels change frequently
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相關代理商/技術參數 |
參數描述 |
|---|---|
| M38C29MC-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C29MC-XXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C29RLFS | 功能描述:EMULATOR MCU FOR A-VERSION 38C2 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 內電路編程器、仿真器以及調試器 系列:- 產品變化通告:Development Systems Discontinuation 19/Jul/2010 標準包裝:1 系列:* 類型:* 適用于相關產品:* 所含物品:* |
| M38C29T-64FPD | 功能描述:DEV 100-PIN RFS/MCU TO 64-PIN 0. RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標準包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關產品:1-Wire? 設備 產品目錄頁面:1429 (CN2011-ZH PDF) |
| M38C29T-64LCA | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Converter from 100-pin RFS Type Emulator MCU to 64-pin 0.8mm-pitch QFP (for 38C1, 38C2, 38K0 and 38K2 Group of 38000 Series) |
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