2) Data Communication of ASIC and PITS
When APT I/F Module in CPU send the request signal to the proprietary telephone and after receiving the key input information
(19 pulses) from the proprietary telephone and sending data (47 pulses) for LED control. APT I/F Module will receive
acknowledge signal from the proprietary telephone.
a) Reception
The data from the proprietary telephone is received via H and L lines along the path shown below.
H.L line → C208 → IC200 →T201 → R235 → Q210 → CPU
b) Transmission
The data to the proprietary telephone is transmitted along the following Path.
CPU → Q209 → Q215 → T201 → IC200 → C208 → H.L line
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KX-TEA308CE
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