Appendix C: LCD Interface

R

Instruction Set

Table C-6shows the instruction set for the LCD panel.

Table C-6:Display Instructions

Instruction

RS

RW

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

 

 

 

 

 

 

 

 

 

 

 

Read display data

1

1

 

 

 

Read Data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8-bit data specified by the column and page address can be read from the Display Data RAM. The column address is increased automatically, thus data can be read continuously from the addressed page.

Write display data

1

0

Write Data

 

 

 

 

8-bit data can be written into a RAM location specified by the column and page address. The column address is increased automatically, thus data can be written continuously to the addressed page.

Read status

0

1

 

BUSY

ADC

ONOFF

 

RESETB

0

0

 

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

BUSY: Device is BUSY when internal operation or reset. (0=active, 1 =busy).

 

 

 

 

 

 

ADC: Indicates the relationship between RAM column address and segment driver.

 

 

 

 

 

 

ONOFF: Indicates display ON or OFF status.

 

 

 

 

 

 

 

 

 

 

RESETB: Indicates if initialization is in progress.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Display ON/OFF

0

0

 

1

0

1

 

0

1

1

 

1

DON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn display ON or OFF. (1=ON, 0 = OFF)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Initial display line

0

0

 

0

1

ST5

 

ST4

ST3

ST2

 

ST1

ST0

 

 

 

 

 

 

 

 

 

 

 

 

Sets the line address of the display RAM to determine the initial line of the LCD panel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST5

 

ST4

ST3

ST2

 

ST1

ST0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

0

0

0

 

0

0

Line address 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

0

0

0

 

0

1

Line address 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

..

 

..

..

..

 

..

..

 

..

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

1

1

1

 

1

0

Line address 62

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

1

1

1

 

1

1

Line address 63

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set reference voltage mode

0

0

 

1

0

0

 

0

0

0

 

0

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set reference voltage register

0

0

 

x

x

SV5

 

SV4

SV3

SV2

 

SV1

SV0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This is a two-byte instruction. The first instruction sets the reference voltage mode. The second instruction sets the reference voltage parameter.

SV5

SV4

SV3

SV2

SV1

SV0

 

 

 

 

 

 

 

 

0

0

0

0

0

0

0

 

 

 

 

 

 

 

0

0

0

0

0

1

1

 

 

 

 

 

 

 

..

..

..

..

..

..

..

 

 

 

 

 

 

 

1

1

1

1

1

0

62

 

 

 

 

 

 

 

1

1

1

1

1

1

63

 

 

 

 

 

 

 

130

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Virtex-5 FPGA ML561 User Guide

 

 

UG199 (v1.2) April 19, 2008

Page 130
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Xilinx ML561 manual Instruction Set, Table C-6Display Instructions