HT1622
RAM Mapping 32´8 LCD Controller for I/O
mC
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
General Description
HT1622 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 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-
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-
troller and the HT1622. The HT162X series
have many kinds of products that match vari-
ous 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 ]
