HT1622 Datasheet, PDF (1/17 Pages) Holtek Semiconductor Inc – RAM Mapping 32x8 LCD Controller for I/O xC

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 HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270
COM
4
4
8
8
8
8
16
16
16
SEG
32
32
32
32
48
64
48
64
64
Built-in Osc.
Ö
Ö
Ö
Ö
Ö
Ö
Crystal Osc. Ö
Ö
Ö
Ö
Ö
Ö
Ö
1
April 21, 2000