ML9042 datasheet(46/58 Pages) LAPIS

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FEDL9042-01

LAPIS Semiconductor

ML9042-xx

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LCD Drive Waveforms

The COM and SEG waveforms (AC signal waveforms for display) vary according to the duty (1/9 and 1/17 duties).

See 1) and 2) below.

The relationship between the duty ratio and the frame frequency is as follows:

Duty ratio

Frame Frequency

1/8

84.4 Hz

1/9

75.0 Hz

1/16

84.4 Hz

1/17

79.4 Hz

Note: At an oscillation frequency (OSC) of 270 kHz

1) COM and SEG Waveforms on 1/9 Duty (ABE = “1”)

1 frame

V2, V3B

COM1 (CSR = “L”, AS = “L”)

COM2 (CSR = “L”, AS = “H”)

COM9 (CSR = “H”, AS = “L”)

COM8 (CSR = “H”, AS = “H”)

(first character line)

COM2 (CSR = “L”, AS = “L”)

COM3 (CSR = “L”, AS = “H”)

COM8 (CSR = “H”, AS = “L”)

COM7 (CSR = “H”, AS = “H”)

(second character line)

COM8 (CSR = “L”, AS = “L”)

COM9 (CSR = “L”, AS = “H”)

COM2 (CSR = “H”, AS = “L”)

COM1 (CSR = “H”, AS = “H”)

(eighth character line)

COM9 (CSR = “L”, AS = “L”)

COM1 (CSR = “L”, AS = “H”)

COM1 (CSR = “H”, AS = “L”)

COM9 (CSR = “H”, AS = “H”)

(arbitrator line)

V2, V3B

COM10 to

COM17

V2, V3B

SEG

Display

turning-off

waveform

Display

turning-on

waveform

8 9 1 2 3 4 ··· 7 8 9 1 2 3 4 ··· 7 8 9 1 2

2 1 9 8 7 6 ··· 3 2 1 9 8 7 6 ··· 3 2 1 9 8

CSR=“H”

CSR=“L”

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