Renesas R8C/15 Technical Information Seite 236

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R8C/14 Group, R8C/15 Group 19. Electrical Characteristics
Rev.2.10 Jan 19, 2006 Page 222 of 253
REJ09B0164-0210
NOTES:
1. This condition is not applicable when using with Vcc
1.0V.
2. When turning power on after the time to hold the external power below effective voltage (V
por1) exceeds10s, refer to Table
19.9 Reset Circuit Electrical Characteristics (When Not Using Voltage Monitor 1 Reset)
.
3. t
w(por2) is time to hold the external power below effective voltage (Vpor2).
NOTES:
1. When not using the voltage monitor 1 reset, use with Vcc
2.7V.
2. t
w(por1) is time to hold the external power below effective voltage (Vpor1).
Figure 19.3 Reset Circuit Electrical Characteristics
Table 19.8 Reset Circuit Electrical Characteristics (When Using Voltage Monitor 1 Reset
)
Symbol Parameter Condition Standard Unit
Min. Typ. Max.
V
por2 Power-On Reset Valid Voltage -20°C Topr < 85°C −−Vdet1 V
t
w(Vpor2-Vdet1) Supply Voltage Rising Time When Power-On Reset is
Deasserted
(1)
-20°C Topr < 85°C,
t
w(por2) 0s
(3)
−−100 ms
Table 19.9 Reset Circuit Electrical Characteristics (When Not Using Voltage Monitor 1 Reset)
Symbol Parameter Condition Standard Unit
Min. Typ. Max.
V
por1 Power-On Reset Valid Voltage -20°C Topr < 85°C −−0.1 V
t
w(Vpor1-Vdet1) Supply Voltage Rising Time When Power-On Reset is
Deasserted
0°C Topr 85°C,
t
w(por1) 10s
(2)
−−100 ms
t
w(Vpor1-Vdet1) Supply Voltage Rising Time When Power-On Reset is
Deasserted
-20°C Topr < 0°C,
t
w(por1) 30s
(2)
−−100 ms
t
w(Vpor1-Vdet1) Supply Voltage Rising Time When Power-On Reset is
Deasserted
-20°C Topr < 0°C,
t
w(por1) 10s
(2)
−− 1ms
t
w(Vpor1-Vdet1) Supply Voltage Rising Time When Power-On Reset is
Deasserted
0°C Topr 85°C,
t
w(por1) 1s
(2)
−−0.5 ms
NOTES:
1. Hold the voltage of the microcomputer operation voltage range (Vccmin or above) within sampling time.
2. A sampling clock can be selected. Refer to 6. Voltage Detection Circuit for details.
3. V
det1 indicates the voltage detection level of the voltage detection 1 circuit. Refer to 6. Voltage Detection Circuit for details.
V
det1
(3)
Vpor1
Internal Reset
Signal
(“L” Valid)
t
w(por1)
tw(Vpor1–Vdet1)
Sampling Time
(1, 2)
Vdet1
(3)
1
f
RING-S
× 32
1
f
RING-S
× 32
Vpor2
Vccmin
tw(por2) tw(Vpor2–Vdet1)
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