Zilog Z8F0411 - Manual (Page 17)

MDS General-Purpose Board Development Kit
User Manual
UM016905-1207 MDS-GP Board Features
12
LCD Interface
Figure 6 displays the LCD interface on the MDS-GP board. It provides
the following two different interface options:
•
Four-bit parallel interface (using GPIO pins), controlled by LCD
enable, LCD RD/WR, and LCD register select signals.
•
I 2 C/I 2 C bus expander interface enabled by jumper J26
(see I 2 C Expanders on page 16).
ZNEO ® Z16F processor module requires minor changes for LCD
interfacing by four-bit parallel interface (GPIO pins). See
ZNEO
® Z16F in Appendix—MDS-PM Board Pin Maps on page
33.
LCD contrast can be adjusted using potentiometer R26. Software control
of the back light can be enabled using jumper J28. The default configura-
tion drives the LCD in a four-bit mode using GPIO port pins of your MDS
processor module. For information on pins used, see
Appendix—MDS-
PM Board Pin Maps on page 33.
Note: