HT1650_10 Datasheet, PDF (1/19 Pages) Holtek Semiconductor Inc – 6432 LCD Controller for I/O MCU

PATENTED
PAT No. : 099352
Technical Document
· Tools Information
· FAQs
· Application Note
HT1650
64´32 LCD Controller for I/O MCU
Features
· Operating voltage: 2.7V~5.2V
· Built-in 32kHz RC oscillator
· External 32.768kHz crystal oscillator or 32kHz fre-
quency source input
· Standby current: <1mA at 3V, <2mA at 5V
· Internal resistor type: 1/6 bias or 1/5 bias, 1/32 duty,
and 1/16 duty
· Three selectable LCD frame frequencies: 64Hz,
89Hz or 170Hz
· Max. of 64´32 patterns, 64 segments and 32 com-
mons
· 80 segments and 16 commons selectable by com-
mand method
· Built-in bit-map display RAM: 2048 bits (=64´32 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
· _{128-pin QFP package}
Applications
· _{Leisure products}
· _Games
· _{Personal digital assistant}
· _{Cellular phone}
· _{Global positioning system}
· _{Consumer electronics}
General Description
HT1650 is a peripheral device specially designed for I/O
type MCUs which are used to expand the display capa-
bility. The max. display segment of the device are 2048
patterns (64 segments and 32 commons). It also sup-
ports four data bits interface, buzzer sound, Watchdog
Timer or time base timer functions. The HT1650 is a
memory mapping and multi-function LCD controller. It
can control TN-type (Twisted Nematic) or STN-type
(Super Twisted Nematic) LCDs. The software configu-
ration feature of the HT1650 make it suitable for multiple
LCD applications including LCD modules and display
subsystems. Only six lines (CS, WR, DB0~DB3) are re-
quired for the interface between the host controller and
the HT1650.
Rev. 1.80
1
November 9, 2010