R61509V

Target Spec

Frame-Frequency Adjustment Function

The R61509V supports a function to adjust frame frequency. The frame frequency for driving liquid crystal can be adjusted by setting the DIVI, RTNI bits without changing the oscillation frequency.

By changing the DIVI and RTNI settings, the R61509V can operate at high frame frequency when displaying a moving picture, which requires the R61509V to rewrite data in high speed, and it can operate at low frame frequency when displaying a still picture.

Relationship between Liquid Crystal Drive Duty and Frame Frequency

The following equation represent the relationship between liquid crystal drive duty and frame frequency. The frame frequency can be changed by setting the 1H period adjustment bit (RTNI) and the operation clock frequency division ratio setting bit (DIVI).

Equation for calculating frame frequency

FrameFrequency =

fosc

[Hz]

NumberofClocks / line DivisionRatio ⋅ (Line + FP + BP)

fosc: RC oscillation frequency Number of clocks per line: RTNI bit Division ratio: DIVI bit

Line: number of lines to drive the LCD panel (NL bit)

Number of lines for front porch: FP

Number of lines for back porch: BP

Example of Calculation: when maximum frame frequency = 60 Hz

fosc: 678 kHz

Number of lines: 432 lines

1H period: 25 clock cycles (RTNI [4:0] = “11001”)

Division ratio of operating clock: 1/1

Front porch: 2 lines

Back porch: 14 lines

fFLM = 678 (kHz) / 25 (clocks) ⋅ 1/1 ⋅ (432+2+14) (lines) 60.5 (Hz)

Rev. 0.11 April 25, 2008, page 137 of 181

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Renesas R61509V manual Frame-Frequency Adjustment Function, Example of Calculation when maximum frame frequency = 60 Hz

R61509V specifications

The Renesas R61509V is a versatile and advanced display controller designed to manage graphical user interfaces in various electronic devices. This controller is particularly popular among manufacturers of consumer electronics due to its rich feature set and efficient performance. The R61509V is known for its compatibility with a range of display technologies including LCD and OLED, making it a go-to choice for diverse applications in automotive, industrial, medical, and consumer sectors.

One of the standout features of the R61509V is its high-resolution support, allowing it to drive displays with resolutions up to 800x480 pixels. This capability ensures that users experience clear, vibrant visuals, enhancing the overall usability of devices. The controller supports 16-bit RGB output, enabling a broad color palette and ensuring that colors are rendered accurately and with richness.

The R61509V also incorporates advanced graphics capabilities, including a built-in graphics engine that supports various graphical elements. This engine allows for the overlay of graphics and images, creating smooth transitions and animations that enhance user interaction. Its ability to handle multiple layers makes it ideal for applications that require a complex user interface.

Additionally, the R61509V utilizes a serial peripheral interface (SPI) for communication, allowing for seamless integration with microcontrollers and processors. This feature simplifies the design process and reduces the overall system cost by minimizing the need for additional components. The controller is designed to operate with low power consumption, making it suitable for battery-powered devices where efficiency is critical.

In terms of software support, the R61509V is accompanied by a wide range of software development tools, including drivers and libraries that facilitate the development of applications. Its flexible programming architecture allows engineers to implement custom functionalities that enhance the user experience.

The R61509V is built on reliable, scalable technology, ensuring that it can adapt to various industry demands. With its combination of high-performance graphics, versatile display support, and low power usage, the Renesas R61509V is a compelling choice for manufacturers looking to create innovative and visually appealing products. Whether in automotive dashboards, medical devices, or user-centric consumer electronics, the R61509V enables captivating display solutions that meet modern technological requirements.