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CXLC8963C: cost-effective 72-point LCD driver chip comprehensive analysis

In the fields of consumer electronics, industrial instruments and intelligent devices, liquid-crystal display technology is widely used due to its low power consumption and high reliability. As the core component of the display system, the performance of LCD driver chip directly affects the display effect and system energy consumption. JTM-IC launched by jiatam (CXLC8963C) is a 72-point memory image multi-function LCD driver chip, with its simplified three-wire interface, flexible software configuration and excellent power consumption control, it is an ideal choice for small and medium scale LCD display applications.nqP嘉泰姆

I. CXLC8963C Product Overview

CXLC8963C is an LCD driver that integrates 18 × 4-bit display RAM and supports up to 72 points (18 segments × 4 public terminals) of LCD display. Different from the traditional complex interface scheme, the chip uses a simplified three-wire serial interface to communicate with main controller, greatly simplifying the system wiring. Its built-in multiple power management modes and configurable bias voltage and duty cycle options enable it to flexibly adapt to different types of LCD panels, especially for applications with strict requirements on cost and space.nqP嘉泰姆

II. Core functional features

•Wide voltage working range: 2.4V ~ 5.2V, suitable for various power supply environments such as battery power supply and regulated power supplynqP嘉泰姆

•Built-in clock source: Integrated 256kHz RC oscillator, can work without external crystal oscillatornqP嘉泰姆

•Flexible LCD driver configuration: supports 1/2 or 1/3 bias, 1/2, 1/3, or 1/4 duty cyclenqP嘉泰姆

•Ultra-low power design: power saving mode, standby current as low as 0.1 μA @ 3vnqP嘉泰姆

•Integrated Display RAM: Built-in 18 × 4-bit display memory, directly mapped to LCD drivernqP嘉泰姆

•Simplified interface design: uses three-wire serial interfaces (/CS,/WR, DATA)nqP嘉泰姆

•Multiple encapsulation options: provides 1400.00G encapsulation forms of SOP28 and SSOPnqP嘉泰姆

3. Pin function and electrical characteristics

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3.1. Pin configuration

CXLC8963C pins are divided into the following categories:nqP嘉泰姆

•Power socket pin: VDD (positive power supply), VSS (ground), VLCD(LCD power input)nqP嘉泰姆

•Control pin:/CS (chip selection),/WR (write pulse), and DATA (serial DATA)nqP嘉泰姆

•Display output: COM0 ~ COM3(4 public terminals), SEG0 ~ SEG5, SEG13 ~ SEG19, SEG26 ~ SEG30 (18 segments in total)nqP嘉泰姆

3.2. Electrical parameters

Under typical operating conditions (VDD = 3V or 5V):nqP嘉泰姆

•When using on-chip RC oscillator, work current is 150 ~ 600AnqP嘉泰姆

•In the power saving mode, the standby current is only 0.1 ~ 10μAnqP嘉泰姆

•LCD drive capability: common end source/leakage current reaches 80 ~ 250μa, segment output source/leakage current reaches 40 ~ 200μAnqP嘉泰姆
3.2.1) absolute maximum rating rangenqP嘉泰姆
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(1) at these levels in the above table, the chip may cause permanent damage to the device and reduce the reliability of the device under long-term use conditions. We don'tnqP嘉泰姆
It is suggested that the chip work beyond these limit parameters under any other conditions.nqP嘉泰姆
(2) all voltage values are tested systematicallynqP嘉泰姆
3.2.2) DC electrical parametersnqP嘉泰姆
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3.2.3) AC electrical characteristicsnqP嘉泰姆
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IV. System architecture and working principle

4.1 display memory (RAM) management

CXLC8963C built-in 18 × 4-bit static RAM stores display data in a 31 × 4-bit format. The display memory corresponding to SEG0 ~ SEG5, SEG13 ~ SEG19, and SEG26 ~ SEG30 is valid. RAM data is directly mapped to LCD drivers and supports direct read and write operations.nqP嘉泰姆

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4.2. Clock system

The chip uses built-in 256kHz RC oscillator as the system clock source, and generates LCD drive clock (typical value 256Hz) by frequency division. Run the SYS DIS command to stop the system clock and LCD bias generator and enter the ultra-low power state.nqP嘉泰姆

4.3. LCD driver configuration

CXLC8963C supports multiple LCD configuration options:nqP嘉泰姆

•Bias selection: 1/2 bias or 1/3 biasnqP嘉泰姆

•Public configuration: 2, 3, or 4 public terminalsnqP嘉泰姆

•Duty cycle selection: 1/2, 1/3, or 1/4 duty cyclenqP嘉泰姆

These parameters can be flexibly configured through the BIAS & COM command (command code: 100 0010abXcX) to make the chip compatible with most LCD modules.nqP嘉泰姆
CXLC8963C is a 72(18x 4) point LCD driver, which can be configured as 1/2 or 1/3 LCD driver by softwarenqP嘉泰姆
The device bias and 2, 3 or 4 common ports make CXLC8963C suitable for a variety of LCD applications. LCD drivernqP嘉泰姆
The clock is generated by the system clock frequency division, and the frequency value of the LCD drive clock is kept at 256Hz, which is generated by the internal RC oscillator. LCD drivernqP嘉泰姆
For more information, see the following table.nqP嘉泰姆

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Bold 100 is "100", indicating the command mode type. If continuous commands are executed, the mode type of other commands except the first commandnqP嘉泰姆

The code is ignored. The LCD OFF command disables the LCD bias generator, thus turning OFF the LCD display; The LCD ON command makes the LCD bias generator effective,nqP嘉泰姆
Thus, the LCD display is turned on. BIAS & COM is LCD module related commands, which can make CXLC8963C compatible with most LCD modules.nqP嘉泰姆

4.4. System oscillatornqP嘉泰姆

CXLC8963C system clock is used to generate LCD drive clock. The on-chip RC oscillator (256kHz) generates a clock source. ExecutenqP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,nqP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.nqP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,nqP嘉泰姆
CXLC8963C is in the SYS DIS state.nqP嘉泰姆

V. Command system and interface timing

5.1. Command format

CXLC8963C supports two operating modes:nqP嘉泰姆

•Data mode(Type code 101): used to write display data to RAMnqP嘉泰姆

•Command mode(Type code 100): used for system configuration, including switching system oscillator, configuring LCD parameters, etc.nqP嘉泰姆

CXLC8963C can be set by software. Commands in both modes can be configured to CXLC8963C and transmit the data displayed by the LCD.nqP嘉泰姆
The configuration mode of CXLC8963C is called command mode, and the type code is 100. The command mode includes a system configuration command and a system configuration command.nqP嘉泰姆
Frequency selection command, an LCD configuration command and an operation command. The following table lists the data and command mode types.nqP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.nqP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 previousnqP嘉泰姆
The operation mode is reset. When pin/CS returns "0", the new operation mode type code should be run first.nqP嘉泰姆

5.2. Interface timing

The chip uses a simple three-wire serial interface:nqP嘉泰姆

•/CS: chip selection signal, high level reset interface, low level enable communicationnqP嘉泰姆

•/WR: write the clock and lock the DATA DATA on the rising edge.nqP嘉泰姆

•DATA: bidirectional DATA cable, external pull-up resistornqP嘉泰姆
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5.3. InterfacenqP嘉泰姆

CXLC8963C only three pins are used for interfaces. Pin/CS is used to initialize the serial interface circuit and end main controller andnqP嘉泰姆
Communication between CXLC8963C. When pin/CS is set to 1, the data and commands between main controller and CXLC8963C are invalid.nqP嘉泰姆
And initialize. Before generating command mode or mode conversion, the serial connection of CXLC8963C must be initialized with a high-level pulse.nqP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/WRnqP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 CXLC8963C.nqP嘉泰姆
5.4. Command overviewnqP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 you run a continuous command, except the first onenqP嘉泰姆
Command, the mode type code of other commands will be ignored. We recommend that you initialize main controller with CXLC8963C after power-on reset, because if power-on resetnqP嘉泰姆
If a failure occurs, CXLC8963C will not work properly.nqP嘉泰姆
5.5. Pin drive waveformnqP嘉泰姆
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6. Typical application circuit

In the display system composed of main controller and CXLC8963C, the following design points should be paid attention:nqP嘉泰姆

•VLCD voltage must be lower than VDD voltagenqP嘉泰姆

•Adjust LCD Display contrast through VR resistor (typical value 15kohm ± 20%)nqP嘉泰姆

•DATA,/WR, and/CS signal lines need external pull-up resistor (typical value 40 ~ 150kΩ)nqP嘉泰姆

•ESD protection measures should be taken in dry environment to prevent static damage.nqP嘉泰姆

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Note:1. The voltage of VLCD pin must be less than that of VDD pin;nqP嘉泰姆
2.VR resistance is used to adjust the display gray level of LCD display. When VDD = 5V and VLCD = 4V, VR is generally selected as 15kΩ (±nqP嘉泰姆
20%).nqP嘉泰姆

VII. Encapsulation information

CXLC8963C provides two compact packages:nqP嘉泰姆

•SOP28: body size 7.62mm × mm, suitable for standard PCB designnqP嘉泰姆

•SSOP28: smaller body size, 0.635mm pin spacing, suitable for high density layoutnqP嘉泰姆

Both packages meet the industrial temperature range (-40℃ ~ 85℃) and meet the reliability requirements in harsh environments.nqP嘉泰姆

VIII. Application field

CXLC8963C is especially suitable for the following scenarios:nqP嘉泰姆

•Household appliances display panel (microwave oven, washing machine, air conditioner, etc.)nqP嘉泰姆

•Industrial instrument display interfacenqP嘉泰姆

•Portable Medical EquipmentnqP嘉泰姆

•Smart home control panelnqP嘉泰姆

•Consumer electronics displaynqP嘉泰姆

IX. Summary

As a cost-effective LCD driver chip, CXLC8963C significantly reduces system costs and design complexity by simplifying interfaces and optimizing architectures while maintaining basic display functions. Its excellent power consumption performance and flexible configuration make it an ideal solution for small and medium-sized LCD display applications.nqP嘉泰姆

If you are looking for a reliable and cost-optimized LCD driver chip, CXLC8963C will be your wise choice. For more detailed technical information, sample application and purchase information, please visit the official website of jiatam:jtm-ic.com.nqP嘉泰姆

X. Relevant chip selection guideMore similar products.....nqP嘉泰姆

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