HT1623

RAM Mapping 48´8 LCD Controller for I/O mC

Selection Table

HT162X

HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270

COM

44

8

8

8

816

16

16

SEG

32

32

32

32

48

64

48

64

64

Built-in Osc.

ÖÖ

Ö

ÖÖÖ

Crystal Osc.

ÖÖ

Ö

ÖÖ

Ö

Ö

1

April 21, 2000

Features

·

Operating voltage: 2.7V~5.2V

·

Built-in RC oscillator

·

External 32.768kHz crystal or 32kHz

frequency source input

·

1/4 bias, 1/8 duty, frame frequency is 64Hz

·

Max. 48´8 patterns, 8 commons, 48 segments

·

Built-in internal resistor type bias generator

·

3-wire serial interface

·

8 kinds of time base/WDT selection

·

Time base or WDT overflow output

·

Built-in LCD display RAM

·

R/W address auto increment

·

Two selection buzzer frequencies

(2kHz/4kHz)

·

Power down command reduces power

consumption

·

Software configuration feature

·

Data mode and Command mode instructions

·

Three data accessing modes

·

VLCD pin to adjust LCD operating voltage

·

Cascade application

General Description

HT1623 is a peripheral device specially de-

signed for I/O type mC used to expand the dis-

play capability. The max. display segment of

the device are 384 patterns (48´8). It also sup-

ports serial interface, buzzer sound, watchdog

timer or time base timer functions. The

HT1623 is a memory mapping and

multi-function LCD controller. The software

configuration feature of the HT1623 make it

suitable for multiple LCD applications includ-

ing LCD modules and display subsystems. Only

three lines are required for the interface be-

tween the host controller and the HT1623. The

HT162X series have many kinds of products

that match various applications.