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參數(shù)資料
| 型號： | MB91266PFM-G-XXX-E1 |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, MROM, 33 MHz, RISC MICROCONTROLLER, PQFP64 |
| 封裝： | LEAD FREE, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 6/53頁 |
| 文件大?。?/td> | 592K |
| 代理商： | MB91266PFM-G-XXX-E1 |
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MB91265 Series
14
■ HANDLING DEVICES
Preventing Latchup
Latch-up may occur in a CMOS IC if a voltage greater than VCC or less than VSS is applied to an input or output
pin or if an above-rating voltage is applied between VCC pin and VSS pin. 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, don’t exceed the absolute 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
In products with multiple VCC and VSS pins, the pins of the same potential are internally connected in the device
to avoid abnormal operations including latch-up. However, you must connect 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.
It is also advisable to connect a ceramic bypass capacitor of approximately 0.1
F between VCC and VSS near
this device.
About Crystal oscillator circuit
Noise near the X0 and X1 pins may cause the device to malfunction. Design the printed circuit board so that
X0, X1, the crystal oscillator (or ceramic oscillator), and the bypass capacitor to ground are located as close to
the device as possible.
It is strongly recommended to design the PC board artwork with the X0 and X1pins surrounded by ground plane
because stable operation can be expected with such a layout.
Mode pins (MD0 to MD2)
These pins should be connected directly to VCC pin or VSS pin.
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 VSS is as short as possible and the connection impedance is low.
Operation at start-up
Be sure to execute setting initialized reset (INIT) with INIT pin immediately after start-up.
Also, in order to provide a delay while the oscillator circuit stabilize immediately after start-up, maintain the "L"
level input to the INIT pin for the required stabilization wait time of the oscillation circuit.
(For INIT via the INIT pin, the oscillation stabilization wait time setting is initialized to the minimum value.)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB91266PMC-GS-XXX | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller |
| MB91266PMC-GS-XXXE1 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller |
| MB91266PMC-G-XXX | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller |
| MB91266PMC-G-XXXE1 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller |
| MB91270 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Microcontroller |
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