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4 1/4 duty cycle output waveform – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 47 LCD Controller

5.Operation

5.4 1/4 Duty Cycle Output Waveform

In the 1/4 duty cycle output mode, COM0, COM1, COM2, and COM3 outputs are all used for LCD display.

• Example of 1/3 Bias Output Waveform

LCD cells with the maximum voltage difference between common and segment output are lit.

Table 5-3 Example of Data Memory Contents for Display

Segment

Contents of data memory for display

COM3 output

COM2 output

COM1 output

COM0 output

SEG 2n

output

0

1

0

0

SEG2n+1

output

0

1

0

1

C O M 3 o u t p u t

C O M 0 o u t p u t

C O M 1 o u t p u t

C O M 2 o u t p u t

V 0

V 1

V 2

V 3

V 0

V 1

V 2

V 3

V 0

V 1

V 2

V 3

V 0

V 1

V 2

V 3

S E G 2 n o u t p u t

V 0

V 1

V 2

V 3

S E G 2 n + 1 o u t p u t

V 0

V 1

V 2

V 3

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n , C O M 0 o u t p u t

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n , C O M 1 o u t p u t

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n , C O M 2 o u t p u t

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n , C O M 3 o u t p u t

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n + 1 , C O M 0 o u t p u t

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n + 1 , C O M 1 o u t p u t

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n + 1 , C O M 2 o u t p u t

L C D c e l l c o r r e s p o n d i n g t o S E G 2 n + 1 , C O M 3 o u t p u t

O N

O F F

O N

O F F

O N

O F F

O N

O F F

O N

O F F

O N

O F F

O N

O F F

O N

O F F