Xilinx ML561 manual Operation Example of the 64128EFCBC-3LP

Models: ML561

1 140
Download 140 pages 58.4 Kb
Page 127
Image 127

R

Hardware Schematic Diagram

The voltage and contrast settings must be configured before the LCD panel is ready for operation. Figure C-6shows the initialization procedure required to set up the LCD controller.

Setup Instruction Flow

Power ON

Board Power Supply Start

RESETB Pin is Kept LOW

Start FPGA Configuration

RESETB Pin is Kept LOW

FPGA Configured and Application Running

RESETB Pin is Taken HIGH

ADC Select

-ADC = 0 SEG1 --> SEG132

-ADC = 1 SEG132 --> SEG1

SHL Select

-SHL = 0 COM1 --> COM64

-SHL = 1 COM64 --> COM1

ADC Select

SHL Select

LCD Bias Select

Voltage Converter ON

Voltage Regulator ON

Voltage Follower ON

Regulator Resistor Select Set Reference Voltage

End Initialization

LCD Bias

DUTY0, 1 is "11".

LCD Bias 0 = 1/7

LCD Bias 1 = 1/9

Wait longer than 1 ms between

each instruction to let the voltages stabilize.

The on-chip resistors are used. Therefore, the selection MUST be set to 101.

Setting Reference Voltage is a two-pass instruction:

-Set Reference Voltage Mode

-Set Reference Voltage Register

UG199_C_06_050106

Figure C-6:LCD Controller Initialization Flow

Operation Example of the 64128EFCBC-3LP

The KS0713 LCD controller has several default settings of operation on the LCD panel PCB. Some settings are forced through direct bonding on the chip. The default settings are:

Master mode

Parallel mode

Internal oscillator

Duty cycle ratio is set to 1/65

Voltage converter input is between 2.4V ≤VDD ≤3.6V, where VDD connects to 3.3V

Internal voltage divider resistors

Temperature coefficient is set to -0.05%/° C

Normal power mode is set

Virtex-5 FPGA ML561 User Guide

www.xilinx.com

127

UG199 (v1.2) April 19, 2008

Page 127
Image 127
Xilinx ML561 manual Operation Example of the 64128EFCBC-3LP, Figure C-6LCD Controller Initialization Flow