■DC0ｘ Value and DCDC1 Step-up Clock Signal Waveform Example

DCDC1 performs charge operation and boost operation with the step-up clock generated from the timing generator.

The DCDC1 step-up clock frequency is adjusted by setting the division ratio of the reference clock frequency with DC0x register. (To prevent flickering, the DCDC1 step-up clock signal is synchronized with the reference point of display operation in unit of lines.) Note: Set DC0x and RTNx so that (DCDC1 step-up clock frequency) ≧ (line clock frequency)

If the above restriction is not followed, the duty cycle during the boost period is less than 50%. As a result, the step-up circuit may not operate normally.

Example) DIVn=2'h0, RTN＝5'h19 (reference clock period = 1/1 of internal operation clock, 1H period = 25 clocks)

Reference clock

Reference clock counter

a) DC0x=3'h4

(1/8 of reference clock frequency)

DCDC1 step-up clock

b) DC0x=3'h5

(1/16 of reference clock frequency)

DCDC1 step-up clock

c) DC0x=3'h6

(1/32 of reference clock frequency)

DCDC1 step-up clock

Reference point

 

1H period

 

 

 

 

 

 

 

 

 

 

Reference point

 

 

 

 

 

 

 

 

 

 

 

 

 

5'h10 5'h00 5'h01 5'h02 5'h03 5'h04 5'h05 5'h06 5'h07 5'h08 5'h09

5'h0A

5'h0B 5'h0C 5'h0D

5'h0E

5'h0F

5'h10

5'h11

5'h12

5'h13

5'h14

5'h15

5'h16

5'h17

5'h18 5'h00 5'h01 5'h02 5'h03 5'h04 5'h05 5'h06 5'h07 5'h08

Synchronized with the reference point in unit of lines

 

 

 

 

 

 

 

 

 

 

 

 

Synchronized with the reference point in unit of lines

8 clock cycles

 

8 clock cycles

 

 

 

 

 

8 clock cycles

 

 

 

 

16 clock cycles

 

 

 

 

 

 

 

 

 

 

 

 

 

32 clock cycles (As the number of clocks per 1H period is less than 32, the duty cycle of the step-up clock is not 50%.

 

 

 

 

 

 

Note: The duty cycle of the step-up clock should be close to 50%.

■DC1ｘ Value and DCDC2 Step-up Clock Signal Waveform Example

DCDC2 performs charge operation and boost operation with the step-up clock generated from the timing generator.

The DCDC2 step-up clock frequency is adjusted by setting the division ratio of the reference clock frequency with DC1x register. (To prevent flicker, the DCDC2 step-up clock signal is synchronized with the head of BP period in unit of lines.)

Example) BP=FP=8'h08, NL=7'h6B (front porch = back porch 8 lines, the number of lines to drive the LCD = 432 lines)

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Reference Reference Reference Reference Reference Reference Reference

Reference

Reference

Reference

Reference Reference Reference Reference Reference Reference Reference Reference Reference

Reference

Reference

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

point

1H period 1H period 1H period

Reference clock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line clock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Counter for the number of lines

'h1BE 'h1BF

'h000 'h001 'h002 'h003 'h004

'h005 'h006 'h007 'h008

'h009 'h00A

'h00B 'h00C

'h00D 'h00E

'h00F

'h010

'h011

'h012

'h013

'h014

'h015

'h016

'h017

'h018

'h019

 

Front Porch

Back Porch

 

Display Area

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Synchronized with the head of BP period

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

a) DC1x=3'h2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1/4 of line clock frequency)

 

4H cycles

4H cycles

 

4H cycles

 

4H cycles

 

 

 

 

 

 

 

 

 

 

 

DCDC2 step-up clock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b) DC1x=3'h3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1/8 of line clock frequency)

 

8H cycles

 

 

 

8H cycles

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DCDC2 step-up clock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

c) DC0x=3'h4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1/16 of line clock frequency)

 

 

16H cycles

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DCDC2 step-up clock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Renesas R61509V manual DC0ｘ Value and DCDC1 Step-up Clock Signal Waveform Example
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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.
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