HT1620_09 Datasheet, PDF (1/16 Pages) Holtek Semiconductor Inc – RAM Mapping 324 LCD Controller for I/O MCU

PATENTED
PAT No. : 099352
Technical Document
· FAQs
· Application Note
HT1620
RAM Mapping 32´4 LCD Controller for I/O MCU
Features
· Logic operating voltage: 2.4V~3.3V
· LCD voltage: 3.6V~4.9V
· Low operating current <3mA at 3V
· 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/Wy address auto increment
· Data mode and command mode instructions
· Three data accessing modes
· HT1620: 64pin LQFP package
HT1620G: Gold bumped chip
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
applications including LCD modules and display sub-
systems. Only three or four lines are required for the in-
terface 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 various
applications.
Selection Table
HT162X
HT1620
COM
4
SEG
32
Built-in Osc.
¾
Crystal Osc.
Ö
HT1621
4
32
Ö
Ö
HT1622
8
32
Ö
¾
HT16220
8
32
¾
Ö
HT1623
8
48
Ö
Ö
HT1625
8
64
Ö
Ö
HT1626
16
48
Ö
Ö
Rev. 1.80
1
July 27, 2009