UPD16661A View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD16661A

160-OUTPUT LCD COLUMN (SEGMENT) DRIVER WITH RAM

NEC => Renesas Technology 

µPD16661A

11. SYSTEM CONFIGURATION EXAMPLE

This is an example of the configuration of a liquid-crystal panel of half VGA size (480 × 320, perpendicular) using

four µPD16661A devices and two row drivers.

• Each column driver sets the LSI No. with the PL0, PL1, and PL2 pins.

• The DIR pin of each column driver is set to low.

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

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

• The OSC1 and OSC2 pins have an oscillator resistor attached on the master, and are left open on the slaves.

• All the signals from the system side (D0 to D15, A0 to A16, /CS, /OE, /WE, /UBE, RDY, /RESET, /DOFF) are

connected in parallel to the column driver. A pull-up resistor is attached to the RDY signal.

• The TEST pin is used to test the LSI, and is left open or connected to the GND when the system is configured.

VCC2

STB

/FRM

/DOUT,/DOFF'

L1

L2

/REFRH

Row

driver

Master

No.0

OSC1

OSC2

Slave

No.2

Y1

Y160 Y1

Scan direction

Y160

240

RDY

/DOFF

/RESET

D0 to D15

A0 to A16

Control

( /CS, /OE,

/WE, /UBE)

Row

driver

Scan direction

240

Y160

Y1 Y160

Y1

Slave

No.1

Slave

No.3

Remark /DOFF’ is an input pin of row driver.

19

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