MB90350E Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Fabricante

MB90350E

16-bit Microcontrollers

Fujitsu 

MB90350E Series

12. Stabilization of power supply voltage

A sudden change in the supply voltage may cause the device to malfunction even within the VCC supply voltage

operating range. Therefore, the VCC supply voltage should be stabilized. For reference, the supply voltage should

be controlled so that VCC ripple variations (peak- to-peak values) at commercial frequencies (50 MHz/

60 MHz) fall below 10% of the standard VCC supply voltage and the coefficient of fluctuation does not exceed

0.1 V/ms at instantaneous power switching.

13. Serial Communication

There is a possibility to receive wrong data due to the noise or other causes on the serial communication.

Therefore, design a printed circuit board so as to avoid noise.

Retransmit the data if an error occurs because of applying the checksum to the last data in consideration of

receiving wrong data due to the noise.

14. Port 0 to port 3 output during power-on (External-bus mode)

As shown below, when power is turned on in external-bus mode, there is a possibility that output signal of

Port 0 to Port 3 might be unstable regardless of reset inputs.

1/2 VCC

VCC

Port 0 to Port 3

Port 0 to Port 3 outputs Port 0 to Port 3 outputs = Hi-Z

might be unstable.

15. Setting using CAN function

To use CAN function, please set “1” to DIRECT bit of CAN direct mode register (CDMR).

16. Flash security function

The security byte is located in the area of the Flash memory. If protection code 01H is written in the security byte,

the Flash memory is in the protected state by security.

Therefore please do not write 01H in this address if you do not use the security function.

Please refer to following table for the address of the security byte.

Product name

Flash memory size

Address for security bit

MB90F352E(S)

MB90F352TE(S)

MB90F357E(S)

MB90F357TE(S)

Embedded 1 Mbit Flash memory

FE0001H

17. Operation with TA = +105 °C or more

If used exceeding TA = +105 °C, please contact Fujitsu sales representatives for reliability limitations.

26

DS07-13744-4E

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