參數(shù)資料
型號(hào)： MB91F211BPMC-GSE1
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, 1.70 HEIGHT, 0.50 PITCH, PLASTIC, LQFP-100
文件頁(yè)數(shù)： 9/72頁(yè)
文件大小： 1895K
代理商： MB91F211BPMC-GSE1
MB91210 Series
DS07-16804-3E
17
■ HANDLING DEVICES
Preventing latch-up
Latch-up may occur in a CMOS IC, if a voltage greater than VCC pin or less than VSS pin is applied to input
and output pin, or if an above-rating voltage is applied between VCC and VSS. When latch-up occurs, it may
significantly increase 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 pins
Do not leave an unused input pin open, since it may cause a malfunction. Handle by performing a pull-up or
pull-down with a resistance of 2 k
Ω or more. An unused I/O pin should be set to the output status and left open.
When set to the input status, it should be handled in the same way as an input pin.
Serial Communication
There is a possibility to receive wrong data due to the noise or other causes on the serial communication.
Therefore, design a printed circuit board so as to avoid noise.
Retransmit the data if an error occurs because of applying the checksum to the last data in consideration of
receiving wrong data due to the noise.
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 inside the device to prevent such malfunctioning as latch-up. However, you must connect all the
pins to external power supply and a ground line 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 output current
rating. Moreover, connect the current supply source with the VCC and VSS pins of this device at the low
impedance.
Furthermore, it is also advisable to connect a ceramic bypass capacitor of approximately 0.1
μF between VCC
and VSS pins near this device.
This device incorporates a regulator. When using the device with 5 V power supply, apply that power supply to
the VCC pin and always connect a 1
μF or greater capacitor to the C pin for the regulator.
Crystal oscillator circuit
Noise near the X0/X1 pins and X0A/X1A pins may cause the device to malfunction. Design the PC board such
that X0/X1 pins, X0A/X1A pins, the crystal oscillator (or ceramic oscillator), and the bypass capacitor to the
ground are placed as near one another as possible. When routing the X0 and X1 signals, they should be shielded
for use on the board. Caution must be taken especially when using a pin next to the X0.
It is strongly recommended to design the PC board artwork with the X0, X1, X0A and X1A pins surrounded by
ground plane because stable operation can be expected with such a layout.
In addition, a sub clock is required even when a dual clock product is used as a single clock product.
For MB91F218S input "L" level to X0A pin and open X1A pin.
Please ask the crystal maker to evaluate the oscillational characteristics of the crystal and this device.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB91F211PMC-GSE1 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller
MB91F213 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller
MB91F213PMC-GSE1 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller
MB91F223 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Microcontroller
MB91F223PFV-GSE1 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Microcontroller
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