UPD16662 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD16662

240 OUTPUT LCD COLUMN (SEGMENT) DRIVER WITH BUILT-IN RAM

NEC => Renesas Technology 

µPD16662

2. Liquid-Crystal Timing Generating Circuit

If the circuit is set to Master mode when MS = H, the /FRM and STB signals are generated timed with a duty ratio

1/160.

Generates the driver drive voltage selection signals L1 and L2 for the row driver.

The /FRM is generated twice per frame. The STB is generated 81 times per half a frame; and 162 times per frame.

• Generation of /FRM and STB signals

OSC1

PLUSE

STB

1

2

/FRM

STB

81

1

2

81

1

2

Frame

• Generation of L1 and L2 signals

81

1

2

STB 1 2 3 4 … 1 2 3 4 … 1 2 3 4 … 1 2 3 4 …

L1 1 1 1 1 … 1 1 1 1 … 0 0 0 0 … 0 0 0 0 …

L2 1 0 1 0 … 0 1 0 1 … 0 1 0 1 … 1 0 1 0 …

16

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