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MB90350E Datasheet(PDF) 26 Page - Fujitsu Component Limited.

No. de Pieza. MB90350E
Descripción  16-bit Proprietary Microcontrollers
Descarga  85 Pages
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Fabricante  FUJITSU [Fujitsu Component Limited.]
Página de inicio  http://edevice.fujitsu.com/fmd/en/index.html
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MB90350E Datasheet(HTML) 26 Page - Fujitsu Component Limited.

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MB90350E Series
26
12. Stabilization of power supply voltage
A sudden change in the power supply voltage may cause the device to malfunction even within the specified
power supply voltage VCC operating range. Therefore, the power supply voltage VCC should be stabilized.
For reference, the power supply voltage should be controlled so that VCC ripple variations (peak-to-peak value)
at commercial frequencies (50 Hz/60 Hz) fall below 10
% of the standard power supply voltage VCC and the
coefficient of fluctuation does not exceed 0.1 V/ms at instantaneous power switching.
13. Initialization
In the device, there are internal registers which are initialized only by a power-on reset. To initialize these
registers, turn on the power again.
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.
15. Setting using CAN function
To use CAN function, please set “1” to DIRECT bit of CAN direct mode register (CDMR).
If DIRECT bit is set to “0” (initial value), wait states will be performed when accessing CAN registers.
Note : Please refer to section “23.12 CAN Direct Mode Register” in Hardware Manual of MB90350E series for detail
of CAN direct mode register.
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.
17. Operation with TA
= +105 °C or more
If used exceeding TA
= +105 °C, please contact Fujitsu sales representatives for reliability limitations.
Product name
Flash memory size
Address for security bit
MB90F352E(S)
MB90F352TE(S)
MB90F357E(S)
MB90F357TE(S)
Embedded 1 Mbit Flash memory
FE0001H
Port 0 to Port 3
Port 0 to Port 3 outputs
might be unstable.
Port 0 to Port 3 outputs = Hi-Z
VCC
1/2 VCC


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