HT16270
RAM Mapping 64
´16
LCD Controller for I/O
mC
Features
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Operating voltage: 2.7V~5.2V
External Crystal 32.768kHz oscillator
1/5 bias, 1/16 duty, frame frequency is 64Hz
Max. 64´16 patterns, 16 commons,
64 segments
Built-in internal resistor type bias generator
3-wire serial interface
8 kinds of time base/WDT selection
Time base or WDT overflow output
Built-in LCD display RAM
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R/W address auto increment
Two selectable buzzer frequencies
(2kHz/4kHz)
Power down command reduces power
consumption
Software configuration feature
Data mode and Command mode instructions
Three data accessing modes
VLCD pin to adjust LCD operating voltage
General Description
HT16270 is a peripheral device specially de-
signed for I/O type
mC
used to expand the dis-
play capability. The max. display segment of
the device are 1024 patterns (64´16). It also
supports serial interface, buzzer sound, watch-
dog timer or time base timer functions. The
HT 1 627 0 is a mem or y m a ppi ng a nd
multi-function LCD controller. The software
configuration feature of the HT16270 make it
suitable for multiple LCD applications includ-
ing LCD modules and display subsystems. Only
three lines are required for the interface be-
tween the host controller and the HT16270.
The HT162X series have many kinds of prod-
ucts that match various applications.
Selection Table
HT162X
COM
SEG
Built-in Osc.
Crystal Osc.
Ö
HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270
4
32
4
32
Ö
Ö
8
32
Ö
Ö
8
32
8
48
Ö
Ö
8
64
Ö
Ö
16
48
Ö
Ö
16
64
Ö
Ö
16
64
1
April 21, 2000
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
