LG DK867 Service Manual page 26

3) RS232 waveform during procedure (Downloading)
5
6
4) Flash CE# enable signal and SCK signal during Downloading
7
8
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Only for training and service purposes
TXD
RXD
FIG 1-3
CE#
SCK
FIG 1-4
3-13
5
6
7 8
IC602
LGE Internal Use Only