參數(shù)資料
型號(hào)： MB90F912BSPMC
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP48
封裝： 7 X 7 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁(yè)數(shù)： 7/64頁(yè)
文件大?。?/td> 1749K
代理商： MB90F912BSPMC
MB90910 Series
DS07–13755–2E
15
5.
Power supply pins (VCC/VSS)
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 malfunction such 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.
Connect VCC and VSS pins to the device from the current supply source at a low impedance.
As a measure against power supply noise, connect a capacitor of about 0.1
μF as a bypass capacitor
between VCC pin and VSS pin in the vicinity of VCC and VSS pins of the device.
6.
Pull-up/down resistors
The MB90910 series does not support internal pull-up/down resistors (Port 2 : built-in pull-up resistors) .
Use external components where needed.
7.
Crystal oscillator circuit
Noises around X0 or X1 pin may be possible causes of malfunctions. Make sure to provide bypass capacitors
via shortest distance from X0, X1 pins, crystal oscillator (or ceramic resonator) and ground lines, and make
sure, that lines of oscillation circuit do not cross the lines of other circuits.
It is highly recommended to provide a printed circuit board artwork surrounding X0 and X1 pins with a ground
area for stabilizing the operation. Please ask the crystal maker to evaluate the oscillational characteristics
of the crystal and this device.
8.
Turning-on sequence of power supply to A/D converter and analog inputs
Make sure to turn on the A/D converter power supply (AVCC and AVR) and analog inputs (AN0 to AN15) after
turning-on the digital power supply (VCC) .
Turn-off the digital power after turning off the A/D converter power supply and analog inputs. In this case,
make sure that the voltage does not exceed AVRH or AVCC.
9.
Connection of unused pins of A/D converter if A/D converter is not used
Connect unused pins of A/D converter to AVCC
= VCC, AVSS = AVR = VSS.
10. Notes on energization
To prevent the internal regulator circuit from malfunctioning, set the voltage rise time during energization at
50
μs or more (0.2 V to 2.7 V) .
VCC
VSS
MB90910
Series
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