Texas Instruments TVP5154EVM User Manual
Page 34
www.ti.com
Troubleshooting
Table 21. TVP5154EVM Troubleshooting (continued)
SYMPTOM
CAUSE
SOLUTION
Make sure I
2
C slave address jumpers on
Decoder I
2
C slave address is wrong.
the TVP5154 decoder module are across
pins 2 and 3.
Slave address is hard coded to be 0x54 in
the command file. Make sure the I
2
C slave
Encoder I
2
C slave address is wrong.
address jumper on encoder module is
across pins 2 and 3.
Parallel cable is not connected from PC
parallel port to the TVP5154 decoder
Connect cable
module DB25 connector.
Power supply must be plugged into a
100-V to 240-V/47-Hz to 63-Hz power
EVM is not powered on.
source, and the cord must be plugged into
the power connector on the EVM.
Some parallel cables are not wired
Wrong type of parallel cable.
straight through pin for pin. Use the cable
No I
2
C communication
supplied with the EVM.
Press the Reset button on the TVP5154
Device was placed in power-down mode.
Decoder Module.
EVM was configured for an external I
2
C
Reinstall 0-
Ω
resistors R5 and R6. Control
master.
EVM using the PC parallel port.
DO THIS AS A LAST RESORT. Reboot
PC, enter BIOS setup program, and set
parallel port LPT1 mode (Addr 378h) to
ECP mode or bidirectional mode
PC parallel port mode is not set correctly.
(sometimes called PS/2 mode or byte
mode). If already set to one of these two
modes, switch to the other setting (see
PC may not be capable of operating in the
required parallel port mode. This is true of
Still no I
2
C communication
some laptop computers. Use a different
computer, preferably a desktop PC.
When WinVCC is started and the WinVCC Configuration dialog box is closed with OK, the I
2
C system test
is performed (unless the I
2
C System Test program options button was disabled).
If the I
2
C system test fails, a dialog box (see
) appears. This example reports that a read from
TVP5154 failed, using slave address 0xB8, sub-address 0xD0. The data read was 0x78. The expected
data was 0x00.
After noting which device had a problem, click OK to continue. Next, the Corrective Action Dialog box
appears to fix the problem.
34
TVP5154EVM User's Guide
SLEU069A – February 2006 – Revised July 2006