RAM Mapping 64´8 LCD Controller for I/O
mC
Features
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HT1625
Operating voltage: 2.7V~5.2V
Built-in RC oscillator
External 32.768kHz crystal or 32kHz
frequency source input
1/4 bias, 1/8 duty, frame frequency is 64Hz
Max. 64´8 patterns, 8 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
Cascade application
General Description
HT1625 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 512 patterns (64´8). It also sup-
ports serial interface, buzzer sound, Watchdog
Timer or time base timer functions. The
H T 16 25 i s a m em ory m ap ping a nd
multi-function LCD controller. The software
configuration feature of the HT1625 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 HT1625. The
HT162X series have many kinds of products
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 ]
