HT1622
RAM Mapping 32´8 LCD Controller for I/O mC
Selection Table
HT162X HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270
COM 44
8
888161616
SEG 32 32
32
32 48 64 48 64 64
Built-in Osc.
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Crystal Osc.
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1 April 21, 2000
General Description
HT1622 is a peripheral device specially de
-
signed for I/O type mC used to expand the dis
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play capability. The max. display segment of
the device are 256 patterns (32´8). It also sup
-
ports serial interface, buzzer sound, Watchdog
Timer or time base timer functions. The
HT1622 is a memory mapping and multi-func
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tion LCD controller. The software configuration
feature of the HT1622 make it suitable for mul
-
tiple LCD applications including LCD modules
and display subsystems. Only three lines are
required for the interface between the host con
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troller and the HT1622. The HT162X series
have many kinds of products that match vari
-
ous applications.
Features
·
Operating voltage: 2.7V~5.2V
·
Built-in RC oscillator
·
1/4 bias, 1/8 duty, frame frequency is 64Hz
·
Max. 32´8 patterns, 8 commons, 32 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
·
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
·
Cascade application
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