HT1621B RAM Mapping 324 LCD Controller for I/O MCU - Glass COG LCD Driver Chip - SSOP48

Description:

The HT1621B is a high-performance LCD controller designed to interface with I/O microcontrollers. It serves as a driver for Glass COG (Chip-on-Glass) LCDs and offers a wide range of features for efficient display control.   

Key Features:

• RAM Mapping: Provides 324-segment memory mapping for flexible display control.   
• Multi-Function Capabilities: Supports various LCD applications, including LCD modules and display subsystems.   
• Efficient Interface: Requires only three or four lines for communication with the host microcontroller.   
• Low Power Consumption: Includes a power-down command to reduce power consumption when not in use.   
• Built-in Oscillator: Features an internal 256 kHz RC oscillator for clock generation.
• External Clock Input: Accepts external 32.768 kHz crystal or 256 kHz frequency sources.
• Configurable Display Parameters: Allows for customization of LCD bias, duty cycle, and other settings.
• Time Base Generator and Watchdog Timer: Provides built-in timekeeping and system monitoring functions.

Applications:

• LCD Modules: Drives various types of LCD displays, including character displays, segment displays, and graphic displays.   
• Display Subsystems: Used in electronic devices that require LCD interfaces, such as consumer electronics, industrial controls, and automotive systems.   
• Custom Display Solutions: Enables the creation of unique and tailored display designs.

Specifications:

• Operating Voltage: 2.4V to 5.2V
• Built-in Oscillator: 256 kHz RC oscillator
• External Clock: 32.768 kHz crystal or 256 kHz frequency source
• LCD Display: 32x4 segments
• Display RAM: 32x4 bits
• Time Base Generator: Built-in for timing functions   
• Watchdog Timer: For system monitoring and reset
• Package: SSOP48

DATA SHEET AND USECASE

Key Features:

• Memory Mapping: Organized into 32x4 bits, allowing direct mapping to the LCD driver.
• Interface: Requires only three or four lines for communication with the host controller.
• Power Management: Includes a power-down command to reduce power consumption.
• Display Capability: Supports 1/2 or 1/3 bias and 1/2, 1/3, or 1/4 duty LCD applications.
• Built-in Oscillator: Features a 256kHz RC oscillator and supports external 32.768kHz crystal or 256kHz frequency source input.
• Additional Functions: Offers a time base generator, watchdog timer (WDT), and selectable buzzer frequencies (2kHz/4kHz).