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TVP5160EVM User’s Guide 33
Table 10. I
2
C Troubleshooting
Symptom Cause Solution
I
2
C slave address is wrong. Close and restart WinVCC4. Choose the alternate slave
address in the WinVCC4 Configuration dialog.
Parallel cable is not connected from
PC parallel port to the EVM DB25
connector.
Connect cable.
EVM is not powered on. The power supply must be plugged into a 100-V to 240-V/
47-Hz to 63-Hz power source and the cord must be
plugged into the power connector on the EVM.
Wrong type of parallel cable. Some parallel cables are not wired straight through pin-
for-pin. Use the cable supplied with the EVM.
PC parallel port mode is not set
correctly.
Reboot PC, enter BIOS setup program, set parallel port
LPT1 mode (Addr 378h) to ECP mode or bidirectional
mode (sometimes called PS/2 mode or byte mode). If
already set to one of these two modes, switch to the other
setting.
See Section 4.2.1.
Device was placed in power–down
mode.
Press the reset button on the TVP5160EVM.
EVM was configured for an external
I
2
C master.
Reinstall 0-? resistors R5 and R6. Control EVM using the
PC parallel port.
No I
2
C
communication
Still no I
2
C communication The PC may not be capable of operating in the required
parallel port mode. This is true of some laptop computers.
Use a different computer, preferably a desktop PC.
When WinVCC4 is started and the WinVCC4 Configuration dialog box is closed with OK, the I
2
C
system test is performed (unless the I2C System Test program options button was disabled).
If the I
2
C system test fails, a dialog box will appear. Figure 18 reports that a read from TVP5160
failed, using slave address 0xB8, subaddress 0xBD. The data read was 0x00. The expected
data was 0x01.
After noting which device had a problem, click OK to continue. Next, the Corrective Action
Dialog box appears to help fix the problem.