MB91F345B Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Fabricante

MB91F345B

32-bit Microcontroller

Fujitsu 

MB91345 Series

• Note when using external clock

In principle, when using external clock, supply a clock to the X0 pin and an opposite-phase clock signal to the

X1 pin simultaneously. However in this case, the STOP mode (oscillator stop mode) must not be used, because

the X1 pin stops with the “H” output in the STOP mode. At 12.5 MHz or less, the device can be used with the

clock signal supplied only to the X0 pin.

Using an External Clock (Normal Method)

X0

X1

MB91345 series

[The STOP mode (oscillation stop mode) cannot be used.]

Using an External (enabled at 12.5 MHz or lower)

X0

OPEN X1

MB91345 series

Note : The X1 pin must be designed to have a delay within 15 ns, at 10 MHz, from the signal to the X0 pin.

• About C pin

MB91345 series has an internal regulator. A bus condenser of 4.7 µF or above should be connected to the C

pin for the regulator.

C

VSS

4.7 µF

• About AVCC pin

MB91345 series has an internal A/D converter. A condenser of approximately 0.1 µF should be connected

between the AVCC pin and AVSS pin.

AVCC

AVSS

0.1 µF

• Treatment of NC pin and OPEN pin

The NC and OPEN pins should always be open.

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