OM6211 데이터 시트보기 (PDF) - Philips Electronics

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OM6211

48×84 dot matrix LCD driver

Philips Electronics 

Philips Semiconductors

48 × 84 dot matrix LCD driver

Product specification

OM6211

8.9 Bias voltage generator

Generates 4 intermediate LCD bias voltages. The bias

system is selectable; see Section 9.9.

8.10 LCD row and column drivers

The OM6211 contains 48 row and 84 column drivers,

which connect the appropriate LCD bias voltages in

sequence to the display in accordance with the data to be

displayed. Figure 3 shows typical waveforms.

8.11 Reset

A reset initializes the chip. It can be performed either by

the RES pin being LOW or by a command.

9 FUNCTIONAL DESCRIPTION

The OM6211 is a low power LCD driver designed to

interface with microprocessors/microcontrollers and a

wide variety of LCDs.

The host microprocessor or microcontroller and the

OM6211 are connected via a serial interface. The internal

oscillator requires no external components. The

appropriate intermediate bias voltages for the multiplexed

LCD waveforms are generated on-chip. The only other

connections required to complete the system are to the

power supplies (VDD1, VDD2, VSS and VLCD) and suitable

capacitors for decoupling VLCD and VDD2.

handbook, full pagewidth

VDD2

VDD1

VLCD

VDD2, 3

VDD1

HOST

MICROPROCESSOR/

MICROCONTROLLER

OM6211

84 column drivers

48 row drivers

LCD

PANEL

RES

SCE

SCLK

SDA

VSS

VSS

VSS1, 2

MGU273

Fig.2 Typical system configuration.

2002 Jan 17

7

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