HT16C21 Datasheet, PDF (1/34 Pages) Holtek Semiconductor Inc – RAM Mapping 20*4 / 16*8 LCD Driver Controller

HT16C21
RAM Mapping 20*4 / 16*8 LCD Driver Controller
Feature
●● Operating voltage: 2.4 ~ 5.5V
●● Internal 32kHz RC oscillator
●● Bias: 1/3 or 1/4; Duty: 1/4 or 1/8
●● Internal LCD bias generation with voltage-
follower buffers
●● I²C interface
●● Two selectable LCD frame frequencies: 80Hz or
160Hz
●● Up to 16 x 8 bits RAM for display data storage
●● Display patterns:
––20 x 4 patterns: 20 segments and 4 commons
––16 x 8 patterns: 16 segments and 8 commons
●● Versatile blinking modes
●● R/W address auto increment
●● Internal 16-step voltage adjustment to adjust LCD
operating voltage
●● Low power consumption
●● Provides VLCD pin to adjust LCD operating voltage
●● Manufactured in silicon gate CMOS process
●● Package Type: 20/24/28 SOP, 16 NSOP and Chip.
Applications
●● Electronic meter
●● Water meter
●● Gas meter
●● Heat energy meter
●● Household appliance
●● Games
●● Telephone
●● Consumer electronics
General Description
The HT16C21 device is a memory mapping and
multi-function LCD controller/driver. The display
segments of the device are 80 patterns (20 segments
and 4 commons) or 128 patterns (16 segments and 8
commons). The software configuration feature of the
HT16C21 device makes it suitable for multiple LCD
applications including LCD modules and display
subsystems. The HT16C21 device communicates with
most microprocessors/microcontrollers via a two-line
bidirectional I²C interface.
Rev. 1.00
1
November 22, 2011