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KS0094

34 COM / 80 SEG DRIVER & CONTROLLER FOR STN LCD

Samsung 

34 COM / 80 SEG DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 0.4

KS0094

BLOCK DIAGRAM

RESETB

PS

IF

CK

Oscillator

Timing Generator

MI

CSB

RS

RW_WR

E_RD

DB7

(SI)

DB6

(SCL)

DB5-

DB4

DB3-

DB0

Parallel

8

Instruction

Register

Interface

(IR)

4 bit/8 bit

Instruction

Decoder

Address

Display

Counter

Data RAM

(DDRAM)

Serial 8

Interface

Input Buffer

Data

Register

(DR)

640 bits

7

8 Data Output

Register

8

8

(OR)

8

88

80 bits

Shift

Register

DUTY1

DUTY0

Icon

RAM

160 bits

Character

Generator

RAM

(CGRAM)

240 bits

Character

Generator

ROM

(CGROM)

21760 bits

Cursor

and

Blink

Controller

5

5

34 bits

Shift

Register

80 bits

Latch

Circuit

COM1-

Common COM32

Driver

COM I1

COM I2

SEG1-

Segment SEG80

Driver

LCD

Driver

Voltage

Selector

VDD

GND

Segment Data Conversion

Voltage Converter

LCD Driving Power Circuit

Voltage Regulator Voltage Follower & Bias Resistor

CAP1+ CAP1- CAP2+ CAP2- VOUT V0

VR V1 V2 V3 V4

Figure 1. Block Diagram

DIRS

3

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