HT1621/HT1621G
RAM Mapping 32´4 LCD Controller for I/O MCU
PATENTED
PAT No. : TW 099352
Features
·
·
Built-in 256kHz RC oscillator
·
External 32.768kHz crystal or 256kHz frequency
·
32´4 LCD driver
·
Built-in 32´4 bit display RAM
·
3-wire serial interface
·
Internal LCD driving frequency source
·
Software configuration feature
·
Data mode and command mode instructions
·
R/W address auto increment
·
Three data accessing modes
·
VLCD pin for adjusting LCD operating voltage
·
HT1621: 44-pin LQFP package
source input
·
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)
·
Power down command reduces power consumption
·
Built-in time base generator and WDT
·
Time base or WDT overflow output
·
8 kinds of time base/WDT clock sources
HT1621B: 48-pin SSOP/LQFP packages
HT1621G: Gold bumped chip
General Description
The HT1621 is a 128 pattern (32´4), memory mapping,
and multi-function LCD driver. The S/W configuration
feature of the HT1621 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 HT1621.
The HT1621 contains a power down command to re-
duce power consumption.
Selection Table
HT162X
COM
SEG
Built-in Osc.
Crystal Osc.
HT1620
4
32
¾
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. 3.10
1
November 5, 2012
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
