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參數(shù)資料
| 型號： | MB90V590ACR |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, 16 MHz, MICROCONTROLLER, CPGA256 |
| 封裝： | CERAMIC, PGA-256 |
| 文件頁數(shù)： | 5/52頁 |
| 文件大?。?/td> | 718K |
| 代理商： | MB90V590ACR |
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MB90590/590G Series
13
s
s HANDLING DEVICES
(1)Preventing latch-up
CMOS IC chips may suffer latch-up under the following conditions:
A voltage higher than Vcc or lower than Vss is applied to an input or output pin.
A voltage higher than the rated voltage is applied between Vcc and Vss.
The AVcc power supply is applied before the Vcc voltage.
Latch-up may increase the power supply current drastically, causing thermal damage to the device.
For the same reason, also be careful not to let the analog power-supply voltage (AVCC, AVRH) exceed the digital
power-supply voltage.
(2)Treatment of unused pins
Leaving unused input pins open may result in misbehavior or latch up and possible permanent damage of the
device. Therefor they must be pulled up or pulled down through resistors. In this case those resistors should be
more than 2 k
.
Unused bidirectional pins should be set to the output state and can be left open, or the input state with the above
described connection.
(3)Using external clock
To use external clock, drive X0 pin only and leave X1 pin unconnected.
Below is a diagram of how to use external clock.
Using external clock
X0
X1
MB90590/590G Series
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