MB90560 データシートの表示（PDF） - Fujitsu

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コンポーネント説明

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MB90560

16-bit Proprietary Microcontrollers(CMOS)

Fujitsu 

MB90560/565 Series

OPEN

X0

X1

MB90560/565 series

Example of using an external clock

(7) Power supply pins

The multiple VCC and VSS pins are connected together in the internal device design so as to prevent misoperation

such as latch-up. However, always connect all VCC and VSS pins to the same potential externally to minimize

spurious radiation, prevent misoperation of strobe signals due to increases in the ground level, and maintain the

overall output current rating.

Also, ensure that the impedance of the VCC and VSS connections to the power supply is as low as possible.

To minimize these problems, connect a bypass capacitor of approximately 0.1 µF between VCC and VSS. Connect

the capacitor close to the VCC and VSS pins.

(8) Sequence for connecting and disconnecting power supply

Do not apply voltage to the A/D converter power supply pins (AVCC, AVR, AVSS) or analog inputs (AN0 to AN7)

until the digital power supply (VCC) is turned on. When turning the device off, turn off the digital power supply

after disconnecting the A/D converter power supply and analog inputs. When turning the power on or off, ensure

that AVR does not exceed AVCC.

When using the I/O ports that share pins with the analog inputs, ensure that the input voltage does not exceed

AVCC (turning the analog and digital power supplies on and off simultaneously is OK) .

(9) Conditions when output from ports 0 and 1 is undefined

After turning on the power supply, the outputs from ports 0 and 1 are undefined during the oscillation stabilization

delay time controlled by the regulator circuit (during the power-on reset) if the RST pin level is “H”. When the

RST pin level is “L”, ports 0 and 1 go to high impedance.

Figures 1 and 2 show the timing (for the MB90F562B and MB90V560) .

Note that this undefined output period does not occur on products without an internal regulator circuit as these

products do not have an oscillation stabilization delay time.

(MB90561A, MB90562A, MB90F568, MB90567 and MB90568)

16

DS07-13715-5E

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