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CXLC8963D LCD driver details: features, applications, and Configuration GuideTlk嘉泰姆

In modern electronic equipment, liquid crystal display (LCD) technology is widely used in various display modules, and the core component of driving LCD screen-LCD driver, whose performance directly determines the display effect and system power consumption. As a 56-point, memory-based multi-function LCD driver, CXLC8963D has become an ideal choice for many LCD modules and display subsystems due to its flexible software configuration, low power consumption and wide application compatibility. This article will deeply analyze the technical characteristics, electrical parameters, system structure and application configuration of CXLC8963D to help engineers and developers fully grasp the use method of the chip.Tlk嘉泰姆

I. CXLC8963D overview and main features

CXLC8963D is an LCD driver that integrates 14 × 4-bit display RAM, supports 56 display points, and is suitable for a variety of LCD panel configurations. Its operating voltage range is 2.4V to 5.2V, built-in 256kHz RC oscillator, users can also choose external crystal oscillator or external clock source. The chip supports 1/2 or 1/3 bias mode, 1/2, 1/3 or 1/4 duty cycle configuration, and has high design flexibility.Tlk嘉泰姆

The main features include:Tlk嘉泰姆

•  Low power consumption design: power saving mode is supported, and the maximum standby current is only 0.1 μA (under the condition of 3V);Tlk嘉泰姆

•  Three-wire serial interface: only DATA,/CS, and/WR signal lines are required to complete DATA and command transmission;Tlk嘉泰姆

•  Built-in display RAM: 14 × 4-bit memory is directly mapped to LCD driver output, simplifying main controller operations;Tlk嘉泰姆

•  Multiple encapsulation forms: provides 1200.00g packages of SOP24 and QSOP, suitable for high-density PCB layout;Tlk嘉泰姆

•  Software configurable: use the command mode to flexibly set the bias, duty cycle, and clock source.Tlk嘉泰姆

II. Pin connections and electrical characteristics

    The pin design of CXLC8963D is simple and clear, and the main control signals include:

•  /CS: chip selection signal, effective at low level;Tlk嘉泰姆

•  /WR: Write Pulse input, the rising edge locks data;Tlk嘉泰姆

•  DATA: bidirectional serial data cable, built-in pull-up resistor;Tlk嘉泰姆

•  COM0 ~ COM3: LCD common output terminal;Tlk嘉泰姆

•  SEG9 ~ SEG22: LCD segment output terminal;Tlk嘉泰姆

•  VLCD: LCD power input, which must meet VLCD Tlk嘉泰姆

In terms of electrical parameters, the CXLC8963D of the work Current under 3V and 5V power supply conditions are 150μA and 300μa (typical value) respectively, supporting A variety of clock source options: on-chip RC oscillator (256kHz), external crystal oscillator (32.768kHz) or external clock input. The LCD refresh frequency is obtained by dividing the system clock, with a typical value of 256Hz, ensuring stable display without flicker.Tlk嘉泰姆

2.2.Electrical characteristicsTlk嘉泰姆

2.2.1 absolute maximum rating rangeTlk嘉泰姆
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2.2.2 DC electrical parametersTlk嘉泰姆
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2.2.3 AC electrical characteristicsTlk嘉泰姆
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III. System structure and memory mapping

CXLC8963D internally integrates 14 × 4-bit static display RAM, and the data is directly mapped to the LCD driver output. The RAM address is output from 0 to 13 corresponding to SEG9 to SEG22 segments. You can write the displayed data to the corresponding address by writing the command.Tlk嘉泰姆

The system clock is provided by on-chip RC oscillator or external crystal oscillator, and supports power consumption management through commands (such as SYS DIS and SYS EN) Start Stop system oscillator and LCD bias generator. After power-on, the chip is in SYS DIS and LCD OFF by default. The configuration must be initialized by main controller.Tlk嘉泰姆

3.1. System structureTlk嘉泰姆

3.1.1 display memory (RAM)Tlk嘉泰姆

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3.1.2 system oscillatorTlk嘉泰姆

CXLC8963D system clock is used to generate LCD drive clock. The on-chip RC oscillator (256kHz) generates a clock source. ExecuteTlk嘉泰姆
SYS DIS command can stop the system clock and LCD bias generator, SYS DIS command is only applicable to on-chip RC oscillator,Tlk嘉泰姆
When the system clock stops working, the LCD will be blank. The LCD OFF command is used to turn OFF the LCD bias generator when the LCD is biased.Tlk嘉泰姆
After the voltage generator is turned off, you can use the SYS DIS command to reduce the system power consumption. At this time, SYS DIS is the power saving command. When the system starts to power on,Tlk嘉泰姆
CXLC8963D is in the SYS DIS state.Tlk嘉泰姆

3.1.3 LCD driverTlk嘉泰姆

CXLC8963D is a 56(14x 4) point LCD driver, which can be configured by software to 1/2 or 1/3 LCD driver biasTlk嘉泰姆
Pressure and 2, 3 or 4 public ports make CXLC8963D suitable for a variety of LCD applications. LCD drive clock by systemTlk嘉泰姆
Clock frequency division is generated, and the frequency value of LCD drive clock is kept at 256Hz. For more information about LCD driver commands, see the following table.Tlk嘉泰姆

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Bold 100 is "100", indicating the command mode type. If a continuous command is executed, except for the first command, other commandsTlk嘉泰姆
The mode type code of the command is ignored. LCD OFF command disables LCD bias generator, thus turning OFF LCD display; LCDTlk嘉泰姆
The ON command enables the LCD bias generator to turn ON the LCD display. BIAS & COM is an LCD module command, yesTlk嘉泰姆
Make CXLC8963D compatible with most LCD modules.Tlk嘉泰姆

3.1.4Command formatTlk嘉泰姆

CXLC8963D can be set by software. Commands in both modes can be configured to CXLC8963D and transmit the data displayed by the LCD.Tlk嘉泰姆
The configuration mode of CXLC8963D is called command mode, and the type code is 100. The command mode includes a system configuration command and a system configuration command.Tlk嘉泰姆
Frequency selection command, an LCD configuration command and an operation command. The following table lists the data and command mode types.Tlk嘉泰姆

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Mode commands should be run before data or commands are transferred. If continuous commands are executed, the command mode code is 100, which will be ignored.Tlk嘉泰姆
Slightly. When the system is in discontinuous command mode or discontinuous address data mode, pin/CS should be set to "1" and the previousTlk嘉泰姆
The operation mode is reset. When pin/CS returns "0", the new operation mode type code should be run first.Tlk嘉泰姆

3.1.5 interfaceTlk嘉泰姆

           CXLC8963D only three pins are used for interfaces. Pin/CS is used to initialize the serial interface circuit and end main controller andTlk嘉泰姆
Communication between CXLC8963D. When pin/CS is set to 1, the data and commands between main controller and CXLC8963D are invalid.Tlk嘉泰姆
And initialize. Before generating command mode or mode conversion, the serial connection of CXLC8963D must be initialized with a high-level pulse.Tlk嘉泰姆
Mouth. PIN DATA is a serial DATA input/output pin. Read/write DATA and write commands are performed through PIN DATA. Pin/WRTlk嘉泰姆
It is the write clock input pin. When the/WR signal rises, the DATA, address, and command on the PIN DATA are written to CXLC8963D.Tlk嘉泰姆

3.1.6 timing chartTlk嘉泰姆

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3.1.7 command overviewTlk嘉泰姆

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All bold numbers, namely 101 and 100, are the mode command codes. 100 is the command mode type code, if running continuous lifeTlk嘉泰姆
Command, except for the first command, the mode type code of other commands will be ignored. We recommend that you use main controller initial after power-on reset.Tlk嘉泰姆
CXLC8963D, because if the power-on reset fails, the CXLC8963D will not work properly.Tlk嘉泰姆

3.1.8 pin drive waveformTlk嘉泰姆

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IV. Command mode and interface timing

4.1. CXLC8963D supports two operation modes: Data mode(Type code 101) andCommand mode(Type code 100). The data mode is used for writing display data, and the command mode is used for system configuration, including:Tlk嘉泰姆

•  SYS DIS / SYS EN: turn off/on the system oscillator;Tlk嘉泰姆

•  LCD OFF / LCD ON: turn off/on LCD display;Tlk嘉泰姆

•  BIAS&COM: Configure bias (1/2 or 1/3) and number of common terminals (2/3/4);Tlk嘉泰姆

•  RC 256K / XTAL 32K: Select the system clock source.Tlk嘉泰姆

4.2. The communication interface adopts a three-wire system with simple timing:Tlk嘉泰姆

•Pull down/CS enable chip;Tlk嘉泰姆

•Lock DATA on the DATA line on the rising edge of/WR;Tlk嘉泰姆

•When writing continuously, only the first command must contain the pattern type code.Tlk嘉泰姆

V. Application scenarios and design suggestions

5.1.CXLC8963D is applicable to a variety of LCD display scenarios, including:Tlk嘉泰姆

•  Display Module of portable instrument;Tlk嘉泰姆

•  Control panel of household appliances;Tlk嘉泰姆

•  Industrial control human machine interface (HMI);Tlk嘉泰姆

•  Low power handheld devices.Tlk嘉泰姆

5.2. During the design process, attention should be paid:Tlk嘉泰姆

•  VLCD voltage must be lower than VDD, and the display contrast can be adjusted by external resistor (such as 15kΩ);Tlk嘉泰姆

•  Strengthen ESD protection in dry environment to avoid static damage;Tlk嘉泰姆

•  After power on, you must send an initialization command through main controller to ensure that the chip works properly.Tlk嘉泰姆

VI. Packaging and mechanical dimensions

CXLC8963D provides two encapsulation options:Tlk嘉泰姆

•  SOP24: total length mm, colloid width mm, suitable for universal PCB design;Tlk嘉泰姆

•  QSOP24: smaller size (total length mm, colloid width mm), suitable for space-constrained scenarios.Tlk嘉泰姆

Both packages conform to the industrial temperature range (-40℃ to 85℃) and have good welding reliability and mechanical strength.Tlk嘉泰姆

VII. Peripheral application block diagram

VIII. Conclusion

With its high integration, low power consumption and flexible configuration capability, CXLC8963D has become an excellent solution in the LCD driver market. Whether used in consumer electronics or industrial equipment, its stable performance and simple interface design can significantly improve the display effect and energy efficiency ratio of products.Tlk嘉泰姆

For more information about CXLC8963D technical information, sample application or purchase information, please visitJTM-IC official website, we provide you with comprehensive technical support and product services.Tlk嘉泰姆

IX. Relevant chip selection guide More similar products.....Tlk嘉泰姆

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