参数资料
型号: MB90671PF
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP80
封装: PLASTIC, QFP-80
文件页数: 84/106页
文件大小: 1648K
代理商: MB90671PF
MB90670/675 Series
79
(2)Specification for Power-on Reset
(AVSS = VSS = 0.0 V, TA = –40
°C to +85°C)
*: VCC must be kept lower than 0.2 V before power-on.
Notes :
The above ratings are values for causing a power-on reset.
When HST is set to “L” level, apply power according to this table to cause a power-on reset irrespective of
whether or not a power-on reset is required.
For built-in resources in the device, re-apply power to the resources to cause a power-on reset.
There are internal registers which can be initialized only by a power-on reset. Apply power according to this
rating to ensure initialization of the registers.
Parameter
Symbol
Pin name
Condi-
tion
Value
Unit
Remarks
Min.
Max.
Power supply rising time
tR
VCC
—30
ms
*
Power supply cut-off time
tOFF
VCC
1—
ms
Due to repeated
operations
VCC
tOFF
0.2 V
2.7 V
0.2 V
tR
RAM data retained
VSS
Sudden changes in the power supply voltage may cause a power-on reset.
To change the power supply voltage while the device is in operation, it is recommended to raise the voltage
smoothly to suppress fluctuations as shown below.
Main power
supply voltage
Sub power supply voltage
It is recommended to keep the rising
speed of the supply voltage at 50 mV/ms
or slower.
VCC
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