mb90f352espmc1 Fujitsu Microelectronics, Inc., mb90f352espmc1 Datasheet - Page 26

• Manufacturer Part Number: mb90f352espmc1
• Description: 16-bit Proprietary Microcontrollers
• Manufacturer: Fujitsu Microelectronics, Inc.

26
MB90350E Series
12. Stabilization of power supply voltage
13. Initialization
14. Port 0 to port 3 output during power-on (External-bus mode)
15. Setting using CAN function
Note : Please refer to section “23.12 CAN Direct Mode Register” in Hardware Manual of MB90350E series for detail
16. Flash security function
17. Operation with T
MB90F352E(S)
MB90F352TE(S)
MB90F357E(S)
MB90F357TE(S)
A sudden change in the power supply voltage may cause the device to malfunction even within the specified
power supply voltage V
For reference, the power supply voltage should be controlled so that V
at commercial frequencies (50 Hz/60 Hz) fall below 10% of the standard power supply voltage V
coefficient of fluctuation does not exceed 0.1 V/ms at instantaneous power switching.
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.
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.
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.
The security byte is located in the area of the Flash memory. If protection code 01
the Flash memory is in the protected state by security.
Therefore please do not write 01
Please refer to following table for the address of the security byte.
If used exceeding T
of CAN direct mode register.
Product name
A
Port 0 to Port 3
A
= +105 °C, please contact Fujitsu sales representatives for reliability limitations.
= +105 °C or more
CC
operating range. Therefore, the power supply voltage V
V
CC
H
Embedded 1 Mbit Flash memory
in this address if you do not use the security function.
Flash memory size
Port 0 to Port 3 outputs
might be unstable.
1/2 V
CC
Port 0 to Port 3 outputs = Hi-Z
CC
ripple variations (peak-to-peak value)
Address for security bit
H
CC
is written in the security byte,
should be stabilized.
FE0001
H
CC
and the