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| 型号： | R5F21112FP |
| 厂商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| 中文描述： | 单片16位CMOS微机 |
| 文件页数： | 9/29页 |
| 文件大小： | 275K |
| 代理商： | R5F21112FP |
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Rev.1.00
Sep 17, 2004
page 17 of 26
REJ09B0062-0100Z
R8C/11 Group
5. Electrical Characteristics
Symbol
Standard
Typ.
Unit
Measuring condition
Min.
Max.
Parameter
Power-on reset valid voltage
NOTES:
1. The voltage detection circuit which is embedded in a microcomputer is a factor to generate the hardware reset 2. Refer to 5.1.2 Hardware
Reset 2 of Hardware Manual.
2. This condition is not applicable when using with Vcc
≥ 1.0V.
3. When turning power on after the time to hold the external power below effective voltage exceeds 10s, refer to Table 16.8 Reset Circuit
Electrical Characteristics (When Not Using Voltage Moitor 1 Reset).
s
Supply voltage rising time when power-on reset is canceled
2
V
ms
Vpor2
tw(Vpor2-
Vdet)
Vdet
0
tw(por2)
Time to hold external power below valid voltage
100
Figure 5.3 Reset Circuit Electrical Characteristics
Vpor1
Vcc min
Vdet3
tw(por1) tw(Vpor1–Vdet)
Sampling time1,2
Internal reset signal
(“L” effective)
fRING-S
1
X 32
fRING-S
1
X 32
Vpor2
NOTES:
1. Hold the voltage of the microcomputer operation voltage range (Vccmin or above) within sampling time.
2. A sampling clock is selectable. Refer to “5.4 Voltage Detection Circuit” of Hardware Manual for details.
3. Vdet shows the voltage detection level of the voltage detection circuit. Refer to “5.4 Voltage Detection Circuit”
of Hardware Manual for details.
tw(por2) tw(Vpor2 –Vdet)
Symbol
Standard
Typ.
Unit
Measuring condition
Min.
Max.
Parameter
Power-on reset valid voltage
NOTES:
1. When not the sing hardware reset 2, use with Vcc
≥ 2.7V.
Time to hold external power on below valid voltage
s
Supply voltage rising time when power-on reset is canceled
100
-20°C
≤ Topr ≤ 0°C
V
ms
Vpor1
tw(Vpor1-
Vdet)
tw(por1)
Time to hold external power on below valid voltage
0.1
0.5
1
tw(Vpor1-
Vdet)
tw(por1)
tw(Vpor1-
Vdet)
tw(por1)
tw(Vpor1-
Vdet)
tw(por1)
Supply voltage rising time when power-on reset is canceled
Time to hold external power on below valid voltage
Supply voltage rising time when power-on reset is canceled
0°C
≤ Topr ≤ 85°C
0°C
≤ Topr ≤ 85°C
-20°C
≤ Topr ≤ 0°C
-20°C
≤ Topr ≤ 0°C
-20°C
≤ Topr ≤ 0°C
0°C
≤ Topr ≤ 85°C
0°C
≤ Topr ≤ 85°C
10
30
10
1
100
ms
s
Table 5.6 Reset Circuit Electrical Characteristics (When Using Hardware Reset 2)
Table 5.7 Reset Circuit Electrical Characteristics (When Not Using Hardware Reset 2)
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