Sony KV-32HS500 Training Manual page 59

(Reference Figure 7-1)
Main Micro IC2300 generates the clock signal for communications bus network SDAT, SCLK and BDAT, BCLK.
Bus network SDAT, SCLK is used to send data to most of the ICs in the TV set.
Network BDAT, BCLK is dedicated communications to the NVM IC2302 on the M-board.
At power ON, the user and deflection data in IC2302 is retrieved by IC2300 using network BDAT, BCLK and
passed to the appropriate ICs. Once the ICs receive this data to set their operating parameters, the TV can
function.
The data on both bus networks is always present as long as the TV is ON. The data signals can viewed at
CN525/pins 20 and 18 (SDAT and SCLK), and CN525/pins 14 and 12 (BDAT and BCLK). The digital signal for
all four data looks the same when probing with an oscilloscope (5Vpp digital signal). Reference Waveform 7-1
for the oscilloscope display waveform.
Communications bus network DO, CO is only used between the three MID ICs IC3090 (MID Micro), IC3400 (MID
IC), and IC3089 (NVM). MID Micro IC3090 communicates with MID IC3400 to retrieve processed data such as
the input horizontal frequency and uses it to select video signal paths.
MID Micro IC3090 also communicates with memory IC3089 to set up the multi-picture parameters.
CH2
2v
10ms
Waveform 7-1
SDAT_SCLK_BDAT_BCLK
7. DA-4 & DA-4X Data Communication Bus Networks
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