RA4M1 datasheet(107/130 Pages) RENESAS

107 / 130 page

R01DS0355EJ0100 Rev.1.00

Page 107 of 130

Oct 8, 2019

RA4M1 Group

2. Electrical Characteristics

2.12

Segment LCD Controller Characteristics

2.12.1

Resistance Division Method

[Static Display Mode]

[1/2 Bias Method, 1/4 Bias Method]

[1/3 Bias Method]

2.12.2

Internal Voltage Boosting Method

[1/3 Bias Method]

Note 1.

This is a capacitor that is connected between voltage pins used to drive the LCD.

Table 2.61

Resistance division method LCD characteristics (1)

Conditions: VL4 ≤ VCC ≤ 5.5 V

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

LCD drive voltage

VL4

2.0

VCC

Table 2.62

Resistance division method LCD characteristics (2)

Conditions: VL4 ≤ VCC ≤ 5.5 V

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

LCD drive voltage

VL4

2.7

VCC

Table 2.63

Resistance division method LCD characteristics (3)

Conditions: VL4 ≤ VCC ≤ 5.5 V

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

LCD drive voltage

VL4

2.5

VCC

Table 2.64

Internal voltage boosting method LCD characteristics

Conditions: VCC = 1.8 V to 5.5 V

Parameter

Symbol Conditions

Min

Typ

Max

Unit

Test

conditions

LCD output voltage

variation range

VL1

C1 to C4*1 = 0.47 μF

VLCD = 04h

0.90

1.0

1.08

VLCD = 05h

0.95

1.05

1.13

VLCD = 06h

1.00

1.10

1.18

VLCD = 07h

1.05

1.15

1.23

VLCD = 08h

1.10

1.20

1.28

VLCD = 09h

1.15

1.25

1.33

VLCD = 0Ah

1.20

1.30

1.38

VLCD = 0Bh

1.25

1.35

1.43

VLCD = 0Ch

1.30

1.40

1.48

VLCD = 0Dh

1.35

1.45

1.53

VLCD = 0Eh

1.40

1.50

1.58

VLCD = 0Fh

1.45

1.55

1.63

VLCD = 10h

1.50

1.60

1.68

VLCD = 11h

1.55

1.65

1.73

VLCD = 12h

1.60

1.70

1.78

VLCD = 13h

1.65

1.75

1.83

Doubler output voltage

VL2

C1 to C4*1 = 0.47 μF

2 × VL1 - 0.1

2 × VL1 2 × VL1 V-

Tripler output voltage

VL4

C1 to C4*1 = 0.47 μF

3 × VL1 - 0.15 3 × VL1 3 × VL1 V-

Reference voltage

setup time*2

tVL1S

--ms

Figure 2.81

LCD output voltage

variation range*3

tVLWT

C1 to C4*1 = 0.47 μF

500

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