參數(shù)資料
型號： MB91FV310A
廠商： Fujitsu Limited
英文描述： Proprietary 32-bit Microcontroller CMOS
中文描述： 專有的32位微控制器的CMOS
文件頁數(shù)： 16/59頁
文件大?。?/td> 599K
代理商： MB91FV310A
MB91310 Series
16
I
HANDLING DEVICES
Preventing Latchup
Latch-up may occur in a CMOS IC if a voltage greater than V
CC
or less than V
SS
is applied to an input or output
pin or if an above-rating voltage is applied between V
CC
and V
SS
. A latchup,if it occurs, significantly increases
the power supply current and may cause thermal destruction of an element. When you use a CMOS IC, be very
careful not to exceed the maximum rating.
Treatment of Unused Input Pins
Do not leave an unused input pin open, since it may cause a malfunction. Handle by, for example, using a pull-
up or pull-down resistor.
About Power Supply Pins
If there are multiple VCC and VSS pins, from the point of view of device design, pins to be of the same potential
are connected the inside of the device to prevent such malfunctioning as latch up. To reduce unnecessary
radiation, prevent malfunctioning of the strobe signal due to the rise of ground level, and observe the standard
for total output current, be sure to connect the VCC and VSS pins to the power supply and ground externally.
The power pins should be connected to V
CC
and V
SS
of this device at the lowest possible impedance from the
current supply source.
It is also advisable to connect a ceramic bypass capacitor of approximately 0.1
μ
F between VCC and VSS near
this device.
About Crystal Oscillator Circuit
Noise near the X0 and X1 pin may cause the device to malfunction. When designing a PC board using the
device, place the X0 and X1 pins, the crystal (or ceramic) oscillator, and the bypass capacitor leading to the
ground as close to one another as possible.
It is strongly recommended to design PC board so that X0 and X1 pins are surrounded by grounding area for
stable operation.
About Mode Pins (MD0 to MD3)
These pins should be connected directly to VCC or VSS. To prevent the device erroneously switching to test
mode due to noise, design the printed circuit board such that the distance between the mode pins and VCC or
V.0 is as short as possible and the connection impedance is low.
About Tool Reset Pin (TRST)
This pin must input the same signal as that to INIT when the tool is not used. Apply the same treatment to mass-
produced products as well.
Operation at Start-up
A setting initialization reset (INIT) must always be performed via the INIT pin immediately after the power supply
is turned on or recycled.
Immediately after the power supply is turned on, hold the Low level input to the INIT pin for the settling time
required for the oscillator circuit to take the oscillation stabilization wait time for the oscillator circuit. (For INIT
via the INIT pin, the oscillation stabilization wait time setting is initialized to the minimum value.)
相關(guān)PDF資料
PDF描述
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參數(shù)描述
MB91FV310APFV-ES 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Proprietary 32-bit Microcontroller CMOS
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