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HT1660 --
96x32 LCD Controller for I/O MCU
General Description
HT1660 is a peripheral
device specially designed for I/O type used to expand the
display capability. The max. display segment of the device
are 3072 patterns (96 segments and 32 commons). It also
supports four data bits interface, buzzer sound, Watchdog
Timer or time base timer functions. The HT1660 is a memory
mapping and multi-function LCD controller. Since the HT1660
can control TN-type (Twisted Nematic) or STN-type (Super
Twisted Nematic) LCDs. The software configuration feature of
the HT1660 make it suitable for multiple LCD applications
including LCD modules and display subsystems. Only six lines
(CS, WR,
DB0~DB3) are required for the interface between the host
controller and the HT1660.
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Features
- Operating voltage: 2.7V~5.2V
- Built-in 32kHz RC oscillator
- External 32.768kHz crystal oscillator or 32kHz frequency source
input
- Standby current: <1µA at 3V, <2µA at 5V
- Internal resistor type: 1/6 bias or 1/5 bias, 1/32 duty or 1/16
duty
- Three selectable LCD frame frequencies: 64Hz, 89Hz or 170Hz
- Max. of 96x32 patterns, 96 segments and 32 commons
- 112 segments and 16 commons selectable by command method
- Built-in bit-map display RAM: 3072 bits (=96x32 bits)
- Built-in internal resistor type bias generator
- Six-wire interface (four data wires)
- Eight kinds of time base or WDT selection
- Time base or WDT overflow output
- R/W address auto increment
- Built-in buzzer driver (2kHz/4kHz)
- Power down command reduces power consumption
- Software configuration feature
- Data mode and Command mode instructions
- Three data accessing modes
- Provides VLCD pin to adjust LCD operating voltage and max. VLCD
voltage up to 7V
- Provides three kinds of bias current programming
- Control of TN-type and STN-type LCDs
- 208-pin QFP package
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