Lcd Display (16 Character X 2 Lines) - Xilinx ML605 User Manual

Chapter 1: ML605 Evaluation Board

LCD Display (16 Character x 2 Lines)

The ML605 board has a 16-character x 2-line LCD (Display Tech S162D BA BC, installed
onto J41 2x7 header) on the board to display text information. Potentiometer R270 adjusts
the contrast of the LCD. A ST2378E (U33) 2.5V-to-5V level-shifter is used to shift the
voltage level between the FPGA and the LCD. The data interface to the LCD is connected
to the FPGA to support 4-bit mode only. The LCD module has a connector that allows the
LCD to be removed from the board to access to the components below it.
X-Ref Target - Figure 1-22
LCD_DB7
LCD_DB5
NC
NC
LCD_E
LCD_RS
Table 1-25: LCD Header Connections
U1 FPGA Pin
52
Caution!
Care should be taken not to scratch or damage the surface of the LCD window.
J41
1 2
3 4
5 6
7 8
9 10
11 12
13 14
SSW-107-01-T-D
Figure 1-22: LCD Header J41 and Contrast Trimpot R270
Schematic Net Name
AD14 LCD_DB4_LS
AK11 LCD_DB5_LS
AJ11 LCD_DB6_LS
AE12 LCD_DB7_LS
AC14 LCD_RW_LS
T28 LCD_RS_LS
AK12 LCD_E_LS
www.xilinx.com
VCC5
LCD_DB6
LCD_DB4
NC
NC
LCD_RW
LCD_VEE
J41 Pin
4
3
2
1
10
11
9
R158
32
6.81K
32
R270
32
0-2K
1/2W
2
20%
silkscreen:
"LCD Contrast"
UG534_22_073109
ML605 Hardware User Guide
UG534 (v1.2.1) January 21, 2010
VCC5
1%