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HT1620 Datasheet

  • HT1620

  • RAM Mapping 32x4 LCD Controller for I/O C

  • 17頁

  • HOLTEK

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HT1620
RAM Mapping 32麓4 LCD Controller for I/O
mC
Features
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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
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8 kinds of time base/WDT clock source
32麓4 LCD driver
Built-in 32麓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麓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.
Selection Table
HT162X
COM
SEG
Built-in Osc.
Crystal Osc.
脰
HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270
4
32
4
32
脰
脰
8
32
脰
8
32
脰
8
48
脰
脰
8
64
脰
脰
16
48
脰
脰
16
64
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16
64
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1
July 26, 1999

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