Texas Instruments 660 - Manual (Page 85)

Troubleshooting Procedures 5-25
Figure 5-9 Glidepad Interface Troubleshooting Diagram
System Fails to Boot:
Glide Pad Interface Checks
8
Check GLide Pad Data
Signal
Check CN21 Pin2
GLPDATA Signal
Check Glide Pad Power
Check CN21 Pin3
GLPCLK Signal
Check Glide Pad Power Check CN21 Pin1=5V
Check Glide Pad IRQ
Check U8(38813)
Pin14 IRQ12
END
Yes
No
Yes
Yes
Yes
No
No
No