參數(shù)資料
型號： MB90F952MBSPF
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù)： 16/84頁
文件大小： 2562K
代理商： MB90F952MBSPF
MB90950 Series
DS07-13752-1E
23
Stabilization of power supply voltage
A sudden change in the supply voltage may cause the device to malfunction even within the specified VCC supply
voltage operating range. Therefore, the VCC supply voltage should be stabilized.
Stabilize the power supply voltage as follows as a standard level of stabilization.
VCC ripple variations (peak-to-peak value) at commercial frequencies (50 Hz/60 Hz) fall below 10
% of the
standard VCC supply voltage
The coefficient of fluctuation does not exceed 0.1 V/ms at instantaneous power switching.
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.
Port 0 to Port 3 Output During Power-on (External-bus Mode)
As shown below, when the power is turned on in External-Bus mode, there is a possibility that output signal of
Port 0 to Port 3 might be unstable irrespective of the reset input.
Notes on Using the CAN Function
To use the CAN function, please set the DIRECT bit of the CAN Direct Mode Register (CDMR) to 1.
If the DIRECT bit is set to ’0’ (initial value) only MB90V340F, wait states will be performed when accessing CAN
registers.
Note : Please refer to the Hardware Manual of the MB90950 series for detail of CAN Direct Mode Register.
Flash Security Function
A security bit is located in the area of the flash memory.
If protection code 01H is written in the security bit, 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.
Refer to following table for the address of the security bit.
Flash memory size
Address of the security bit
MB90F952
Embedded 2 Mbits Flash Memory
FC0001H
Port0 to Port3 outputs
might be unstable
Port0 to Port3 outputs = Hi-Z
Port0 to Port3
VCC
1/2VCC
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