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參數(shù)資料
| 型號： | MB90641A |
| 廠商： | Fujitsu Limited |
| 英文描述： | 16-bit Proprietary Microcontroller |
| 中文描述： | 16位微控制器專有 |
| 文件頁數(shù)： | 14/96頁 |
| 文件大?。?/td> | 1569K |
| 代理商： | MB90641A |
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14
MB90640A Series
I
HANDLING DEVICES
1. Preventing Latchup
Latchup may occur on CMOS ICs if voltage higher than V
CC
or less than V
SS
is applied to input and output pins
other than medium- and high-voltage pins or if higher than the voltage which shows on “1. Absolute Maximum
Ratings” in “
I
Electrical Characteristics” is applied between V
CC
and V
SS
.
When latchup occurs, power supply current increases rapidlly and might thermally damage elements. When
using, take great care not to exceed the absolute maximum ratings.
Also, take care to prevent the anaolg power supply (AV
CC
and AVR) and analog input from exceeding the digital
power supply (V
CC
) when the analog system power supply is truned on and off.
2. Treatment of Unused Pins
Leaving unused input pins open could cause malfunctions. They should be connected to a pull-up or pull-down
resister.
3. Cautions when Using an External Clock
Drive the X0 pin only when using an external clock.
4. Power Supply Pins
When there are several V
CC
and V
SS
pins, those pins that should have the same electric potential are connected
within the device when the device is designed in order to prevent misoperation, such as latchup. However, all
of those pins must be connected to the power supply and ground externally in order to reduce unnecessary
emissions, prevent misoperation of strobe signals due to an increase in the ground level, and to observe the
total output current standards.
In addition, give a due consideration to the connection in that current supply be connected to V
CC
and V
SS
with
the lowest possible impedance.
Finally, it is recommended to connect a ceramic capacitor of about 0.1
μ
F between V
CC
and V
SS
near this device
as a bypass capacitor.
5. Crystal Oscillation Circuit
Noise in the vicinity of the X0 and X1 pins will cause this device to operate incorrectly. Design the printed circuit
board so that the bypass capacitor connecting X0, X1 and the crystal oscillator (or ceramic oscillator) to ground
is located as close to the device as possible, and possibly take care not to cross over the other wiring with this
wiring.
In addition, because printed circuit board artwork in which the area around the X0 and X1 pins is surrounded
by ground provides stable operation, such an arrangement is strongly recommended.
X0
X1
MB90640A
OPEN
Using an external clock
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB90P641A | 16-bit Proprietary Microcontroller |
| MB90P641APF | 16-bit Proprietary Microcontroller |
| MB90P641APFV | 16-bit Proprietary Microcontroller |
| MB90641APF | 16-bit Proprietary Microcontroller |
| MB90641APFV | 16-bit Proprietary Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB90641APF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90641APFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90652A | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90652APF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90652APFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
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