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| 型號(hào)： | M37641F8FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | 14 X 20 MM, 0.80 MM, PLASTIC, QFP-80 |
| 文件頁(yè)數(shù)： | 41/140頁(yè) |
| 文件大?。?/td> | 1694K |
| 代理商： | M37641F8FP |
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7641 Group
Rev.4.00
Aug 28, 2006
page 133 of 135
REJ03B0191-0400
USB Communication
In applications requiring high-reliability, we recommend providing
the system with protective measures such as USB function initial-
ization by software or USB reset by the host to prevent USB
communication from being terminated unexpectedly, for example
due to external causes such as noise.
Clock Input/Output Pin Wiring (Noise
Elimination)
(1) Make the wiring for the input/output pins as short as possible.
(2) Make the wiring across the grounding lead of the capacitor
which is connected to an oscillator and the Vss pin of the MCU
as short as possible (within 20 mm)
(3) Make sure to isolate the oscillation Vss pattern from other pat-
terns for oscillation circuit-use only.
Oscillator Wiring (Noise Elimination)
(1) Keeping oscillator away from large current signal lines
Install a microcomputer (and especially an oscillator) as far as
possible from signal lines, including USB signal lines, where a cur-
rent larger than the tolerance of current value flows. When a large
current flows through those signal lines, strong noise occurs be-
cause of mutual inductance.
(2) 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.
Terminate Unused Pins
(1) Output ports : Open
(2) Input ports :
Connect each pin to Vcc or Vss through each resistor of 1 k
to
10 k
.
Ports that permit the selecting of a built-in pull-up or pull-down re-
sistor can also use this resistor. As for pins whose potential affects
to operation modes such as pins CNVss, INT or others, select the
Vcc pin or the Vss pin according to their operation mode.
(3) I/O ports :
Set the I/O ports for the input mode and connect them to Vcc or
Vss through each resistor of 1 k
to 10 k.
Ports that permit the selecting of a built-in pull-up or pull-down re-
sistor can also use this resistor. Set the I/O ports for the output
mode and open them at “L” or “H”.
When opening them in the output mode, the input mode of the
initial status remains until the mode of the ports is switched over
to the output mode by the program after reset. Thus, the potential
at these pins is undefined and the power source current may in-
crease in the input mode. With regard to an effects on the
system, thoroughly perform system evaluation on the user side.
Since the direction register setup may be changed because of a
program runaway or noise, set direction registers by program pe-
riodically to increase the reliability of program.
At the termination of unused pins, perform wiring at the shortest
possible distance (20 mm or less) from microcomputer pins.
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 Mask ROM and
Flash Memory version MCUs due to the difference in the manufac-
turing processes.
When manufacturing an application system with the Flash
Memory version and then switching to use of the Mask ROM ver-
sion, please perform sufficient evaluations for the commercial
samples of the Mask ROM version.
DATA REQUIRED FOR MASK ORDERS
The following are necessary when ordering a mask ROM produc-
tion:
1. Mask ROM Order Confirmation Form
2. Mark Specification Form
3. Data to be written to ROM, in EPROM form (three identical cop-
ies) or one floppy disk.
For the mask ROM confirmation and the mark specifications, refer
to the “Renesas Technology Corp.” Homepage
(http://www.renesas.com).
相關(guān)PDF資料 |
PDF描述 |
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| M37641M8-XXXFP | 8-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP80 |
| M37643M8-XXXFP | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80 |
| M37643F8HP | 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP80 |
| M37643M8-XXXHP | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80 |
| M37700M2-XXXFP | 16-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37641F8FP#U0 | 功能描述:IC 740 MCU FLASH 32K 80QFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/7600 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB（20K x 16） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤(pán) 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| M37641F8HP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37641F8HP#U0 | 功能描述:IC 740 MCU FLASH 32K 80LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/7600 產(chǎn)品培訓(xùn)模塊:Graphics LCD System and PIC24 Interface Asynchronous Stimulus 標(biāo)準(zhǔn)包裝:27 系列:PIC® 24H 核心處理器:PIC 芯體尺寸:16-位 速度:40 MIP 連通性:I²C，SPI，UART/USART 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，POR，PWM，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:12KB（4K x 24） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x10b/12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 包裝:管件 產(chǎn)品目錄頁(yè)面:648 (CN2011-ZH PDF) 配用:AC164339-ND - MODULE SKT FOR PM3 28SOICDV164033-ND - KIT START EXPLORER 16 MPLAB ICD2 |
| M37641F8M8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37641F8-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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