R5F562T7DDFM datasheet(82/94 Pages) RENESAS

82 / 94 page

R01DS0096EJ0100 Rev.1.00

Page 82 of 92

Apr 20, 2011

RX62T Group

5. Electrical Characteristics

5.5

Power-on Reset Circuit, Voltage Detection Circuit Characteristics

Note 1. The power-off time indicates the time when VCC is below the minimum value of voltage detection levels VPOR, Vdet1, and Vdet2

for the POR/ LVD.

Figure 5.20

Power-on Reset Timing

Table 5.17

Power-on Reset Circuit, Voltage Detection Circuit Characteristics

Note:Items for which test conditions are not specifically stated in the table below have the same values under conditions 1 to 3.

Condition 1: VCC = PLLVCC = 2.7 to 3.6 V, VSS = PLLVSS = AVSS0 = AVSS = VREFL0 = 0 V

AVCC0 = AVCC = 3.0 to 3.6 V, VREFH0 = 3.0 V to AVCC0, VREF = 3.0 V to AVCC

Condition 2: VCC = PLLVCC = 2.7 to 3.6 V, VSS = PLLVSS = AVSS0 = AVSS = VREFL0 = 0 V

AVCC0 = AVCC = 4.0 to 5.5 V, VREFH0 = 4.0 V to AVCC0, VREF = 4.0 V to AVCC

Ta = -40 to +85°C. Ta is the same under conditions 1 to 3.

Item

Symbol

Min.

Typ.

Max.

Unit

Test Conditions

Voltage detection

level

Power-on reset (POR)

VPOR

2.48

2.60

2.72

Figure 5.20

Voltage detection circuit

(LVD)

Vdet1

2.68

2.80

2.92

Figure 5.21

Vdet2

2.98

3.10

3.22

Figure 5.22

Internal reset time

tPOR

Figure 5.21 and

Figure 5.22

Min. VCC down time*1

tVOFF

200

Figure 5.20 to

Figure 5.22

Reply delay time

tdet

200

Condition 3: VCC = PLLVCC = 4.0 to 5.5 V, VSS = PLLVSS = AVSS0 = AVSS = VREFL0 = 0 V

AVCC0 = AVCC = 4.0 to 5.5 V, VREFH0 = 4.0 V to AVCC0, VREF = 4.0 V to AVCC

Ta = -40 to +85°C

Item

Symbol

Min.

Typ.

Max.

Unit

Test Conditions

Voltage detection

level

Power-on reset (POR)

VPOR

3.70

3.90

4.10

Figure 5.20

Voltage detection circuit

(LVD)

Vdet1

3.95

4.15

4.35

Figure 5.21

Vdet2

4.40

4.60

4.80

Figure 5.22

Internal reset time

tPOR

Figure 5.21 and

Figure 5.22

Min. VCC down time*1

tVOFF

200

Figure 5.20 to

Figure 5.22

Reply delay time

tdet

200

Internal reset signal

(low valid)

VCC

t VOFF

VPOR

t POR

tdet

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