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

System Configuration Example

An example of configuring a liquid-crystal panel of VGA half-size (480 × 320 dots lengthwise) by using four LSIs

and two row drivers.

• Each column driver sets the LSI No. with PL0, PL1 pins.

• The DIR pins of each column driver are all set to low level.

• Only one of the column drivers is set to the master; all the others are set to the slave. Signals are supplied from the

master column driver to the slave column driver and to the row driver.

• Connect a resistor for the oscillator to the OSC1 and OSC2 pins of the master. Leave the OSC1 and OSC2 pins of

the slave open.

• The signals from the system (D0 through D15, A0 through A16, /CS, /OE, /WE, /UBE, RDY, /RESET, and /DOFF)

are connected to all the column drivers in parallel. Connect a pull-up resistor to the RDY signal.

• The TEST pin is used to test the LSI. Open or connect this pin to GND when the system is configured.

VCC2

PULSE

STB

/FRM

/DOUT, /DOFF '

L1

L2

/REFRH

Master

No.1

OSC1

OSC2

Y1

Y240 Y1

Slave

No.1

Y240

RDY

/DOFF

/RESET

D0 - D15

A0 - A16

Control

(/CS, /OE,

/WE, /UBE)

Row

driver

160 Scanning

direction

Row

driver

Scanning

160 direction

Y240

Y1 Y240

Y1

Slave

No.1

Slave

No.1

Remark The /DOFF' pin is an input pin of µPD16667.

18

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