HT1620

RAM Mapping 32´4 LCD Controller for I/O mC

Selection Table

HT162X

HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270

COM

4

48

8

8

8

16

16

16

SEG

32

32

32

32

48

64

48

64

64

Built-in Osc.

ÖÖ

Ö

Ö

Ö

Ö

Crystal Osc.

ÖÖ

Ö

Ö

Ö

Ö

Ö

1

July 26, 1999

Features

·

Logic operating voltage: 2.4V~3.3V

·

LCD voltage: 3.6V~4.9V

·

Low operating current <3mAat3V

·

External 32.768kHz crystal oscillator

·

Selection of 1/2 or 1/3 bias, and selection of

1/2 or 1/3 or 1/4 duty LCD applications

·

Internal time base frequency sources

·

Two selectable buzzer frequencies

(2kHz/4kHz)

·

Built-in capacitor type bias charge pump

·

Time base or WDT overflow output

·

8 kinds of time base/WDT clock source

·

32´4 LCD driver

·

Built-in 32´4-bit display RAM

·

3-wire serial interface

·

Internal LCD driving frequency source

·

Software configuration feature

·

R/W address auto increment

·

Data mode and command mode

instructions

·

Three data accessing modes

General Description

The HT1620 is a 128 pattern (32´4), memory

mapping, and multi-function LCD driver. The

S/W configuration feature of the HT1620

makes it suitable for multiple LCD applica-

tions including LCD modules and display sub-

systems. Only three or four lines are required

for the interface between the host controller

and the HT1620. The HT1620 consumes low

operating current owing to adopting capacitor

type bias charge pump. The HT162X series

have many kinds of products that match vari-

ous applications.