HT1670_10 Datasheet, PDF (1/20 Pages) Holtek Semiconductor Inc – 128x32 LCD Controller for I/O MCU

PATENTED
PAT No. : 099352
Technical Document
· Tools Information
· FAQs
· Application Note
HT1670
128´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. 128´32 patterns, 128 segments and 32 com-
mons
· 144 segments and 16 commons selectable by com-
mand method
· Built-in bit-map display RAM: 4096 bits (=128´32 bits)
· _{Built-in internal resistor type bias generator}
· Six-wire interface (four data wires)
· Eight kinds of time base/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}
Applications
· _{Leisure products}
· _Games
· _{Personal digital assistant}
· _{Cellular phone}
· _{Global positioning system}
· _{Consumer electronics}
General Description
HT1670 is a peripheral device specially designed for I/O
type MCU used to expand the display capability. The
max. display segment of the device are 4096 patterns
(128 segments and 32 commons). It also supports four
data bits interface, buzzer sound, Watchdog Timer or
time base timer functions. The HT1670 is a memory
mapping and multi-function LCD controller. Since the
HT1670 can control TN-type (Twisted Nematic) or
STN-type (Super Twisted Nematic) LCDs. The software
configuration feature of the HT1670 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 HT1670.
Rev. 1.60
1
November 9, 2010