R8CSLASH15 datasheet(234/277 Pages) RENESAS

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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:

This condition is not applicable when using with Vcc

≥ 1.0V.

When turning power on after the time to hold the external power below effective voltage (Vpor1) exceeds10s, refer to Table

19.9 Reset Circuit Electrical Characteristics (When Not Using Voltage Monitor 1 Reset)

tw(por2) is time to hold the external power below effective voltage (Vpor2).

NOTES:

When not using the voltage monitor 1 reset, use with Vcc

≥ 2.7V.

tw(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.

Vpor2

Power-On Reset Valid Voltage

-20

°C ≤ Topr < 85°C

−−

Vdet1

tw(Vpor2-Vdet1) Supply Voltage Rising Time When Power-On Reset is

Deasserted(1)

-20

°C ≤ Topr < 85°C,

tw(por2)

≥ 0s(3)

−−

100

Table 19.9

Reset Circuit Electrical Characteristics (When Not Using Voltage Monitor 1 Reset)

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

Vpor1

Power-On Reset Valid Voltage

-20

°C ≤ Topr < 85°C

−−

0.1

tw(Vpor1-Vdet1)

Supply Voltage Rising Time When Power-On Reset is

Deasserted

°C ≤ Topr ≤ 85°C,

tw(por1)

≥ 10s(2)

−−

100

tw(Vpor1-Vdet1)

Supply Voltage Rising Time When Power-On Reset is

Deasserted

-20

°C ≤ Topr < 0°C,

tw(por1)

≥ 30s(2)

−−

100

tw(Vpor1-Vdet1)

Supply Voltage Rising Time When Power-On Reset is

Deasserted

-20

°C ≤ Topr < 0°C,

tw(por1)

≥ 10s(2)

−−

1ms

tw(Vpor1-Vdet1)

Supply Voltage Rising Time When Power-On Reset is

Deasserted

°C ≤ Topr ≤ 85°C,

tw(por1)

≥ 1s(2)

−−

0.5

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. Vdet1 indicates the voltage detection level of the voltage detection 1 circuit. Refer to 6. Voltage Detection Circuit for details.

Vdet1(3)

Vpor1

Internal Reset

Signal

(“L” Valid)

tw(por1)

tw(Vpor1–Vdet1)

Sampling Time(1, 2)

Vdet1(3)

fRING-S

× 32

fRING-S

× 32

Vpor2

Vccmin

tw(por2) tw(Vpor2–Vdet1)

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