System Control Circuit
Panel Operations
Figure 22
This main CPU, IC9701 uses three different I
2
C bus lines to control peripheral
devices. Bus line 1 controls the operation of the EEPROM. Programmable setting
such as drive settings or white balance is stored in the EEPROM, IC9702. Bus
line 2 controls the video processing, main tuner and the sub tuner. Examples of
video processing include on-screen display, tint or contrast as well as many other
picture adjustments. Bus line 3 reads the data from the Stand-by CPU for front
panel and remote control operation. Additionally bus line 3 reads the condition of
the SOS protection lines and transfers this information to the Main CPU.
In all cases, the Main CPU, is the master of the bus, all other devices are slaves.
This means that all commands are generated from the Main CPU.
39
Summary of Contents for TH37PA20U - 37" SDTV PLASMA DISPLAY
Page 2: ...2 ...
Page 6: ...6 ...
Page 25: ...SC Board Explanation Figure 12 25 ...
Page 29: ...Figure 16 29 ...
Page 56: ...Test Point locations Figure 38 56 ...
Page 60: ...I2 C Menu Structure The values indicated in this flowchart are sampled data Figure 41 60 ...
