HT16L21
RAM Mapping 32×4 LCD Driver
Feature
• Logic operating voltage: 1.8V~5.5V
• LCD operating voltage (V
LCD
): 2.4V~6.0V
• External V
LCD
pin to supply LCD operating voltage
• Internal 32kHz RC oscillator
• Bias: 1/2 or 1/3; Duty:1/4
• Internal LCD bias generation with voltage-follower
buffers
• Integrated regulator to adjust LCD operating voltage:
3.0V, 3.2V, 3.3V, 3.4V, 4.4V, 4.5V, 4.6V, 5.0V
• Integrated LED driver
• Support I
2
C or SPI 3-wire serial interface
controlled by IFS pin
• Four selectable LCD frame frequencies:
64Hz or 85.3Hz or 128Hz or 170.6Hz
• 32×4 bits RAM for display data storage
• Max. 32×4 pixel: 32 segments and 4 commons
• Support two driver output mode segment/LED on
SEG24~SEG31/LED7~LED0
• Versatile blinking modes: off, 0.5Hz, 1Hz, 2Hz
• R/W address auto increment
• Low power consumption
• Manufactured in silicon gate CMOS process
• Package types: 44LQFP
Applications
• Leisure products
• Games
• Telephone display
• Audio combo display
• Video player display
• Kitchen appliance display
• Measurement equipment display
• Household appliance
• Consumer electronics
General Description
The HT16L21 device is a memory mapping and
multi-function LCD controller/driver. The display
segments of the device are 128 patterns (32 segments
and 4 commons) display. It can also support LED
drive outputs on certain Segment pins. The software
configuration feature of the HT16L21 device
makes it suitable for multiple LCD applications
including LCD modules and display subsystems.
The HT16L21 device communicates with most
microprocessors/microcontrollers via a two-wire
bidirectional I
2
C or a three-wire SPI interface.
Rev. 1.10
1
December 27, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
