HW-SPAR3E-SK-US-G Xilinx Inc, HW-SPAR3E-SK-US-G Datasheet - Page 54

• Manufacturer Part Number: HW-SPAR3E-SK-US-G
• Description: KIT STARTER SPARTAN-3E
• Manufacturer: Xilinx Inc

Specifications of HW-SPAR3E-SK-US-G

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 122-1507

Chapter 5: Character LCD Screen
Related Resources
54
Writing Data to the Display
Disabling the Unused LCD
•
To write data to the display, specify the start address, followed by one or more data values.
Before writing any data, issue a
address in the DD RAM. See
Write data to the display using a
data value represents the look-up address into the CG ROM or CG RAM, shown in
Figure
represent the associated character.
If the address counter is configured to auto-increment, as described earlier, the application
can sequentially write multiple character codes and each character is automatically stored
and displayed in the next available location.
Continuing to write characters, however, eventually falls off the end of the first display
line. The additional characters do not automatically appear on the second line because the
DD RAM map is not consecutive from the first line to the second.
If the FPGA application does not use the character LCD screen, drive the LCD_E pin Low
to disable it. Also drive the LCD_RW pin Low to prevent the LCD screen from presenting
data.
•
•
•
Finally, issue a
after issuing this command.
Initial Design for Spartan-3E Starter Kit (Reference Design)
http://www.xilinx.com/s3estarter
PowerTip PC1602-D Character LCD (Basic Electrical and Mechanical Data)
http://www.powertipusa.com/pdf/pc1602d.pdf
Sitronix ST7066U Character LCD Controller
http://www.sitronix.com.tw/sitronix/product.nsf/Doc/ST7066U?OpenDocument
5-4. The stored bitmap in the CG ROM or CG RAM drives the 5 x 8 dot matrix to
Clear Display
www.xilinx.com
Figure 5-3
Set DD RAM Address
Write Data to CG RAM or DD RAM
command. Allow at least 1.64 ms (82,000 clock cycles)
for DD RAM locations.
Spartan-3E FPGA Starter Kit Board User Guide
command to specify the initial 7-bit
UG230 (v1.2) January 20, 2011
command. The 8-bit
R