NJU6538 View Datasheet(PDF) - Japan Radio Corporation

Part Name

Description

Manufacturer

NJU6538

1/8, 1/9, 1/10 Duty BITMAP LCD DRIVER with KEY SCAN

Japan Radio Corporation  

NJU6538

Relation between oscillation frequency and LCD frame frequency

(1)1/8 duty

COM1

VLCD2

V0

V1

V2

Vss

1 line select time(40 T[s])

T = 1/fsys = 2/fosc

(fsys : Internal system clock frequency)

1 23 4 5 6 78 1 23 4 5 6 7 8 1 23

1frame

1frame

SEGn

VLCD2

V0

V1

V2

VSS

1 23 4 5 6 78 1 23 4 5 6 7 8 1 23

Ex.)fosc=50kHz

Frame frequency =1/(40T x duty)=1/(40 x (2/50kHz) x 8)=78.1(Hz)

ON

OFF

(2)1/10 duty

COM1

VLCD2

V0

V1

V2

Vss

SEGn

VLCD2

V0

V1

V2

VSS

1 line select time(35 T[s])

T = 1/fsys = 2/fosc

(fsys : Internal system clock frequency)

1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3

1frame

1frame

1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3

- 26 -

fosc=50kHz

Frame frequency =1/(35T x duty)=1/(35 x (2/50kHz) x 10)=71.4(Hz)

ON

OFF

Ver.2003-05-09

Share Link: