參數(shù)資料
型號: MB90F57APMT
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, MICROCONTROLLER, PQFP120
封裝: PLASTIC, LQFP-120
文件頁數(shù): 42/133頁
文件大小: 2509K
代理商: MB90F57APMT
MB90570 Series
16
s HANDLING DEVICES
1.
Preventing Latchup
CMOS ICs may cause latchup in the following situations:
When a voltage higher than Vcc or lower than Vss is applied to input or output pins.
When a voltage exceeding the rating is applied between Vcc and Vss.
When AVcc power is supplied prior to the Vcc voltage.
In turning on/turning off the analog power supply, make sure the analog power voltage (AVCC, AVRH, DVCC)and
analog input voltages not exceed the digital voltage (VCC).
2.
Connection of Unused Pins
Leaving unused pins open may result in abnormal operations. Clamp the pin level by connecting it to a pull-up
or a pull-down 1k
or more resistor.
3.
Notes on Using External Clock
In using the external clock, drive X0 pin only and leave X1 pin unconnected.
4.
Power Supply Pins (VCC/VSS)
In products with multiple VCC or VSS pins, the pins of a same potential are internally connected in the device to
avoid abnormal operations including latch-up. However, connect the pins external power and ground lines to
lower the electro-magnetic emission level, to prevent abnormal operation of strobe signals caused by the rise
in the ground level, and to conform to the total current rating.
Make sure to connect VCC and VSS pins via lowest impedance to power lines.
It is recommended to provide a bypass capacitor of around 0.1
F between VCC and VSS pin near the device.
Using external clock
MB90570 series
X0
X1
Open
VCC
VSS
Using power supply pins
MB90570 series
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