HT16C23 Datasheet, PDF (1/35 Pages) Holtek Semiconductor Inc – RAM Mapping 56*4 / 52*8 LCD Driver Controller

HT16C23/HT16C23G
RAM Mapping 56*4 / 52*8
LCD Driver Controller
Features
●● 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-bus interface
●● Two Selectable LCD frame frequencies: 80Hz or
160Hz
●● Up to 52 x 8 bits RAM for display data storage
●● Display patterns:
––56 x 4 patterns: 56 segments and 4 commons
––52 x 8 patterns: 52 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: 48LQFP, 64LQFP, Chip and
Goldbump chip.
Applications
●● Electronic meter
●● Water meter
●● Gas meter
●● Heat energy meter
●● Household appliance
●● Games
●● Telephone
●● Consumer electronics
General Description
The HT16C23/HT16C23G device is a memory
mapping and multi-function LCD controller driver.
The Display segments of the device are 224 patterns
(56 segments and 4commons) or 416 patterns (52
segments and 8commons). The software configuration
feature of the HT16C23/HT16C23G device makes it
suitable for multiple LCD applications including LCD
modules and display subsystems. The HT16C23/
HT16C23G device communicates with most
microprocessors / microcontrollers via a two-line
bidirectional I²C-bus.
Block Diagram
VSS
SDA
SCL
Power_on reset
I2C
Controller
Internal RC
Oscillator
8
Display RAM
52*8bits
Timing
generator
VDD
VCCA2
VLCD
Internal
voltage
adjustment
－
OP4
＋
R
－
OP3
＋
R
－
OP2
＋
R
－
OP1
＋
R
LCD bias generator
LCD
Voltage
Selector
Column
/Segment
driver
output
COM0
COM3
COM4/SEG0
COM7/SEG3
SEG4
Segment
driver
output
SEG55
Rev. 1.10
1
June 21, 2011