LM8500-REF-01 National Semiconductor, LM8500-REF-01 Datasheet - Page 24

• Manufacturer Part Number: LM8500-REF-01
• Description: BOARD EVALUATION LM8500
• Manufacturer: National Semiconductor

Specifications of LM8500-REF-01

• Main Purpose: Interface, Touch Screen Controller
• Utilized Ic / Part: LM8500
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

Troubleshooting
The PC does not respond to any touch on
the touch panel.
The touchscreen driver is installed, but the
PC does not response to any touch on the
touch panel.
The NS driver will not install on a
Windows 95/98/ME machine
The driver works, but if I don’t touch the
touch screen for an extended period of time
and I touch it again, the PC does not
response anymore.
Make sure the touchscreen driver is
installed.
Make sure only one touchscreen driver is
installed, either UPDD or the NS driver.
Make sure the touch panel is connected to
the LM8300/8500 evaluation board.
Make sure the serial cable is connected
between the PC and the LM8300/8500
evaluation board.
If the 9V battery is low, then there is not
sufficient voltage supplying the board.
Replace with a new 9V battery. Another
option is to power the board with a 9V
regulated power supply
Make sure a jumper block is placed on J7-1
and J7-1 on jumper J7
The device has the external filter enabled
by default. Make sure there is a jumper
placed in the J4-1 and J5-1 for the active
filter, and J4-2 and J5-2 for the passive
filter.
The NS driver is designed to work only in
the Windows 2K/XP environment. Install
the driver in a Windows 2K/XP machine.
The device has the low power stand by
mode enabled by default. Make sure a
jumper block is placed on J12-2 and J12-3
on jumper J12.