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HT1621B Datasheet

  • HT1621B

  • RAM Mapping 324 LCD Controller for I/O MCU

  • 20頁

  • HOLTEK

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HT1621
RAM Mapping 32麓4 LCD Controller for I/O MCU
Features
路
Operating voltage: 2.4V~5.2V
路
Built-in 256kHz RC oscillator
路
External 32.768kHz crystal or 256kHz frequency
路
Built-in 32麓4 bit display RAM
路
3-wire serial interface
路
Internal LCD driving frequency source
路
Software configuration feature
路
Data mode and command mode instructions
路
R/W address auto increment
路
Three data accessing modes
路
VLCD pin for adjusting LCD operating voltage
路
HT1621: 48-pin SSOP package
source input
路
Selection of 1/2 or 1/3 bias, and selection of 1/2 or
1/3 or 1/4 duty LCD applications
路
Internal time base frequency sources
路
Two selectable buzzer frequencies (2kHz/4kHz)
路
Power down command reduces power consumption
路
Built-in time base generator and WDT
路
Time base or WDT overflow output
路
8 kinds of time base/WDT clock sources
路
32麓4 LCD driver
HT1621B: 48-pin DIP/SSOP/LQFP package
HT1621D: 28-pin SKDIP package
HT1621G: Gold bumped chip
General Description
The HT1621 is a 128 pattern (32麓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
戮
脰
HT1621
4
32
脰
脰
HT1622
8
32
脰
戮
HT16220
8
32
戮
脰
HT1623
8
48
脰
脰
HT1625
8
64
脰
脰
HT1626
16
48
脰
脰
Rev. 1.30
1
August 6, 2003

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