HT1620
RAM Mapping 32´4 LCD Controller for I/O MCU
Features
· Logic operating voltage: 2.4V~3.3V
· 8 kinds of time base/WDT clock source
· LCD voltage: 3.6V~4.9V
· 32´4 LCD driver
· Low operating current <3mA at 3V
· Built-in 32´4-bit display RAM
· External 32.768kHz crystal oscillator
· 3-wire serial interface
· Selection of 1/2 or 1/3 bias, and selection of
· Internal LCD driving frequency source
1/2 or 1/3 or 1/4 duty LCD applications
· Software configuration feature
· Internal time base frequency sources
· R/Wy address auto increment
· Two selectable buzzer frequencies
· Data mode and command mode instructions
(2kHz/4kHz)
· Three data accessing modes
· Built-in capacitor type bias charge pump
· 64-pin LQFP package
· Time base or WDT overflow output
General Description
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.
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 subsystems. Only three or four lines are required for the in-
Selection Table
HT162X
HT1620
HT1621
HT1622
HT16220
HT1623
HT1625
HT1626
COM
4
4
8
8
8
8
16
SEG
32
32
32
32
48
64
48
Built-in Osc.
¾
Ö
Ö
¾
Ö
Ö
Ö
Crystal Osc.
Ö
Ö
¾
Ö
Ö
Ö
Ö
Rev. 1.50
1
March 17, 2008