參數(shù)資料
型號(hào)： MB91101APF-G-JNE1
廠商： FUJITSU LTD
元件分類(lèi)： 微控制器/微處理器
英文描述： 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁(yè)數(shù)： 9/100頁(yè)
文件大小： 2083K
代理商： MB91101APF-G-JNE1
MB91101 Series
16
DS07-16301-6E
5.
Power Supply Pins
When there are several VCC and VSS pins, each of them is equipotentially connected to its counterpart inside
of the device, minimizing the risk of malfunctions such as latch up. To further reduce the risk of malfunctions,
to prevent EMI radiation, to prevent strobe signal malfunction resulting from creeping-up of ground level and
to observe the total output current standard, connect all VCC and VSS pins to the power supply or GND.
It is preferred to connect VCC and VSS of the MB91101 Series to power supply with minimal impedance
possible.
It is also recommended to connect a ceramic capacitor as a bypass capacitor of about 0.1
μF between VCC
and VSS at a position as close as possible to the MB91101 Series.
The MB91101 Series has an internal regulator. When using with 5 V power supply, supply 5 V to VCC5 pin
and make sure to connect about 0.1
μF bypass capacitor to VCC3 pin for regulator. And another 3 V power
supply is needed for the A/D convertor. When using with 3 V power supply, connect both VCC5 pin and VCC3
pin to the 3 V power supply.
6.
Crystal Oscillator Circuit
Noises around X0 and X1 pins may cause the malfunction of the MB91101 Series. In designing the PC
board, layout X0 and X1 pins, crystal oscillator (or ceramic oscillator) and bypass capacitor for grounding
as close as possible.
It is strongly recommended to design PC board so that X1 and X0 pins are surrounded by grounding area
for stable operation.
7.
Turning-on Sequence of A/D Converter Power Supply and Analog Input
Make sure to turn on the digital power supply (VCC) before turning on the A/D converter (AVCC, AVRH) and
applying voltage to analog input (AN0 to AN3).
Make sure to turn off digital power supply after power supply to A/D converters and analog inputs have been
switched off. (There are no such limitations in turning on power supplies. Analog and digital power supplies
may be turned on simultaneously.) Make sure that AVRH never exceeds AVCC when turning on/off power
supplies.
8.
Fluctuation of Power Supply Voltage
Warranty range for normal operation against fluctuation of power supply voltage VCC is as given in rating.
However, sudden fluctuation of power supply voltage within the warranty range may cause malfunctions. It
is recommended to make every effort to stabilize the power supply voltage to IC. It is also recommended
that by controlling power supply as a reference of stabilizing, VCC ripple fluctuation (P-P value) at the com-
mercial frequency (50 Hz to
60 Hz) should be less than 10% of the standard VCC value and the transient regulation should be less than
0.1 V/ms at instantaneous deviation like turning off the power supply.
9.
Mode Setting Pins (MD0 to MD2)
Connect mode setting pins (MD0 to MD2) directly to VCC or VSS.
Arrange each mode setting pin and VCC or VSS patterns on the printed circuit board as close as possible and
make the impedance between them minimal to prevent mistaken entrance to the test mode caused by noises.
Connecting to a power supply
VCC5
AVCC
AVRH
AVSS
VSS
VCC3
5 V
GND
[Using with 5 V power supply]
VCC5
AVCC
AVRH
AVSS
VSS
VCC3
3 V
GND
[Using with 3 V power supply]
About
0.1
μF
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