M5295AFP datasheet(7/13 Pages) RENESAS

7 / 13 page

M5295AL/AP/AFP

REJ03D0780-0200 Rev.2.00 Jun 15, 2007

Page 7 of 12

4. VCC detection voltage adjustment

(1) Detection voltage 1 (VTH1) adjustment

To adjust detection voltage 1, determine external resistance with

the following equations.

VTH1 (V)

4.25

3.5

Detection voltage calculation formula

20.4k

–

49.6k

1.24V

(a) VTH1 > 4.25V (R1 = 10kΩ)

VTH1 =

× 1.24 (V)

R01 + R02

R02

R2 =

8.322k

× 1.24

VTH1 – 1.24

)

(R0 =

20.4k

–

(b) VTH1 < 4.25V (R2 = 5kΩ)

R1 =

(VTH1 – 1.24) 4.016k

1.24

)

(R0 =

49.6k

–

R1 (kΩ)

—

10.90

8.59

R2 (kΩ)

0.92

1.25

1.96

3.17

—

R01 = R1 // 49.6kΩ

R02 = R2 // 20.4kΩ

Figure 6 Detection Voltage 1 (VTH1) Adjustment

(2) Detection voltage 2 (VTH2(L)) adjustment

18.8k

–

51.2k

1.24V

(a) VTH2(L) > 4.6V (R3 = 10kΩ)

R4 =

8.37k

× 1.24

VTH2(L) – 1.24

)

(R0 =

18.8k

–

(b) VTH2(L) < 4.6V (R4 = 5kΩ)

R3 =

(VTH2(L) – 1.24) 3.95k

1.24

)

(R0 =

51.2k

–

VTH2(L) (V)

4.6

3.5

VTH2(L) =

× 1.24 (V)

R03 + R04

R04

∆VTH2 =

× 100 (mV)

R03

51.2k

R3 (kΩ)

—

10.61

8.38

∆VTH2 (mV)

16.3

100

17.2

14.1

R4 (kΩ)

0.93

1.26

1.99

3.24

—

R03 = R3 // 51.2kΩ

R04 = R4 // 18.8kΩ

Detection voltage calculation formula

To adjust detection voltage 2, determine external resistance with

the following equations.

Figure 7 Detection Voltage 2 (VTH2(L)) Adjustment

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