參數(shù)資料
型號(hào): R5F212L4SDFP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32
封裝: 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁數(shù): 26/37頁
文件大?。?/td> 379K
代理商: R5F212L4SDFP
R8C/2K Group, R8C/2L Group
5. Electrical Characteristics
Rev.1.10
Dec 21, 2007
Page 30 of 45
REJ03B0219-0110
NOTES:
1.
The measurement condition is Topr =
20 to 85°C (N version) / 40 to 85°C (D version), unless otherwise specified.
2.
This condition (external power VCC rise gradient) does not apply if VCC
≥ 1.0 V.
3.
To use the power-on reset function, enable voltage monitor 0 reset by setting the LVD0ON bit in the OFS register to 0, the
VW0C0 and VW0C6 bits in the VW0C register to 1 respectively, and the VCA25 bit in the VCA2 register to 1.
4.
tw(por1) indicates the duration the external power VCC must be held below the effective voltage (Vpor1) to enable a power on
reset. When turning on the power for the first time, maintain tw(por1) for 30 s or more if
20°C ≤ Topr ≤ 85°C, maintain tw(por1) for
3,000 s or more if
40°C ≤ Topr < 20°C.
Figure 5.3
Reset Circuit Electrical Characteristics
Table 5.9
Power-on Reset Circuit, Voltage Monitor 0 Reset Electrical Characteristics(3)
Symbol
Parameter
Condition
Standard
Unit
Min.
Typ.
Max.
Vpor1
Power-on reset valid voltage(4)
0.1
V
Vpor2
Power-on reset or voltage monitor 0 reset valid
voltage
0
Vdet0
V
trth
External power VCC rise gradient(2)
20
mV/msec
NOTES:
1. When using the voltage monitor 0 digital filter, ensure that the voltage is within the MCU operation voltage
range (2.2 V or above) during the sampling time.
2. The sampling clock can be selected. Refer to 6. Voltage Detection Circuit for details.
3. Vdet0 indicates the voltage detection level of the voltage detection 0 circuit. Refer to 6. Voltage Detection
Circuit for details.
Vdet0(3)
Vpor1
Internal
reset signal
(“L” valid)
tw(por1)
Sampling time(1, 2)
Vdet0(3)
1
fOCO-S
× 32
1
fOCO-S
× 32
Vpor2
2.2V
External
Power VCC
trth
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