參數(shù)資料
型號(hào)： MB91F463NCPMC-GSE1
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP64
封裝： 12 X 12 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, LEAD FREE, PLASTIC, LQFP-64
文件頁數(shù)： 10/84頁
文件大?。?/td> 1954K
代理商： MB91F463NCPMC-GSE1
MB91460N Series
18
DS07-16607-4E
■ HANDLING DEVICES
Power supply pins
Because there are multiple VCC and VSS pins, respective pins at the same potential are interconnected to
prevent malfunctions such as latch-up. However, you must connect the pins externally to the power supply and
ground lines to reduce the electro-magnetic emission levels, to prevent abnormal operation of strobe signals
caused by the rise in the ground level, and to conform to the total output current rating. Furthermore, the current
supply source should be connected to the VCC and VSS pins of the device at a low impedance.
It is recommended to connect a ceramic bypass capacitor of approximately 0.1
μF as a bypass capacitor between
the VCC and VSS near this device.
Crystal oscillator circuit
Noise in proximity to the X0 and X1 pins can cause the device to malfunction. Printed circuit boards should be
designed so that the X0 and X1 pins, crystal oscillator (or ceramic oscillator), and bypass capacitors connected
to ground are located near the device and ground.
It is recommended that the printed circuit board artwork be designed such that the X0 and X1 pins are surrounded
by ground plane for the stable operation.
Please request the oscillator manufacturer to evaluate the oscillational characteristics of the crystal and this
device.
Mode pins (MD0 to MD3)
Connect them directly to VCC or VSS. To prevent the device from entering test mode accidentally due to noise,
minimize the lengths of the patterns between each mode pin and VCC or VSS on the printed circuit board as
much as possible and connect them at a low impedance. When used pulling down, design your circuit not to
generate noises with a resistance 1 k
Ω or less. Test your circuit and confirm that there is no problem.
Operation at power-on
At power-on, it is necessary to make the terminal INITX “L” level.
Maintain the “L” level input to the INITX pin for the duration of the stabilization wait time immediately after the
power on to ensure the stabilization wait time as required by the oscillator circuit.
Note on oscillator input at power-on
At power-on, ensure that the clock is input until the oscillator stabilization wait time has elapsed.
Built-in regulator
As this series includes built-in step-down regulators, always connect a bypass capacitor of 4.7
μF or more to
the C pin for use by the regulator.
Notes on power on/off
Connect/disconnect the power supply pins when power on/off, or turn on/off in the following order.
Power on : VCC
→ AVCC, AVRH
Power off : AVCC, AVRH
→ VCC
相關(guān)PDF資料
PDF描述
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