參數(shù)資料
型號(hào): MB90242A
廠商: FUJITSU LTD
元件分類(lèi): 微控制器/微處理器
英文描述: 16-Bit Proprietary Microcontroller(16位專(zhuān)用微控制器)
中文描述: 16-BIT, 32 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, LQFP-80
文件頁(yè)數(shù): 14/57頁(yè)
文件大?。?/td> 754K
代理商: MB90242A
MB90242A Series
14
I
HANDLING DEVICES
1. Preventing Latchup
Latchup may occur on CMOS ICs if voltage higher than V
pins other than medium-and high voltage pins or if higher than the voltage is applied between V
CC
or lower than V
SS
is applied to the input or output
CC
and V
SS
.
When latchup occurs, power supply current increases rapidly might thermally damage elements. When using,
take great care not to exceed the absolute maximum ratings.
In addition, for the same reasons take care to prevent the analog power supply from exceeding the digital power
supply.
2. Treatment of Unused Pins
Leaving unused input pins open could cause malfunctions. They should be connected to a pull-up or pull-down
resistors.
3. Precautions when Using an External Clock
When an external clock is used, drive X0 only and X1 should be left open.
4. Power Supply Pins
When there are several V
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.
CC
and V
SS
pins, those pins that should have the same electric potential are connected
In addition, give a due consideration to the connection in that current supply be connected to V
the lowest possible impedance.
CC
and V
SS
with
Finally, it is recommended to connect a capacitor of about 0.1
bypass capacitor.
μ
F between V
CC
and V
SS
near this device as a
Using an External Clock
X0
X1
MB90242A
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