參數(shù)資料
型號(hào)： MB90803PF
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP100
封裝： 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù)： 6/88頁
文件大?。?/td> 874K
代理商： MB90803PF
MB90800 Series
14
s HANDLING DEVICES
1.
Preventing Latchup, Turning on Power Supply
Latchup may occur on CMOSICs under the following conditions:
If a voltage higher than VCC or lower than VSS is applied to input and output pins,
A voltage higher than the rated voltage is applied between VCC and VSS.
If the AVCC power supply is turned on before the VCC voltage.
Ensure that you apply a voltage to the analog power supply at the same time as VCC or after you turn on the
digital power supply (when you perform power-off, turn off the analog power supply first or at the same time as
VCC and the digital power supply).
When latchup occurs, power supply current increases rapidly and might thermally damage elements. When
using CMOSICs, take great care to prevent the occurrence of latchup.
2.
Treatment of unused pins
Leaving unused input pins open could cause malfunctions. They should be connected to pull-up or pull-down
registor. If the A/D converter is not used, connect the pins under the following conditions: AVcc = Vcc and
AVss = Vss.
3.
About the attention when the external clock is used
Using external clock
4.
Treatment of power supply pins (VCC/VSS)
To prevent malfunctions of strobe signals due to the rise in the ground level, lower the level of unnecessary
electro-magnetic emission, and prevent latchup, and conform to the total current rating in designing devices if
multiple VCC or VSS pins exist. Pay attention to connect a power supply to VCC and VSS of MB90800 series device
in a lowest-possible impedance. In addition, near pins of MB90800 series device, connecting a bypass capacitor
is recommended at 0.1
F across VCC and VSS.
5.
Crystal oscillators circuit
Noise near the X0/X1 and X0A/X1A pin may cause the device to malfunction. Design a print circuit so that X0/
X1 and X0A/X1A, a crystal oscillator (or a ceramic oscillator) , and bypass capacitor to the ground become as
close as possible to each other. Furthermore, avoid wires to crossing each other as much as possible. It is highly
recommended that you should use a printed circuit board artwork because you can expect stable operations
from it.
6.
Caution on Operations during PLL Clock Mode
If the PLL clock mode is selected, the microcontroller attempt to be working with the self-oscillating circuit even
when there is no external oscillator or external clock input is stopped. Performance of this operation, however,
cannot be guaranteed. Performance of this operation, however, cannot be guaranteed.
X0
X1
OPEN
相關(guān)PDF資料
PDF描述
MB90822PFV 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP80
MB90911ASPMC 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP48
MB90F912BSPMC 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP48
MB90F243PFV-ES-BND 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP80
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB90803PF-G 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller
MB90803S 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller
MB90803SPF 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller CMOS
MB90803SPF-G 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller
MB90820 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller
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