Lan Block - Panasonic KX-HCM110A Service Manual

[Speaker Sound]
1. The ADPCM sound data are sent from the PC and, after data
decompression in the ADPCM block of the ASIC (101), the data are
transferred as the sound data of 64kbps to the PCM Codec (IC601)
through the Serial I/F.
2. After the law to linear conversion, amplification and DA conversion,
they are output to pin 2 of the speaker jack (CN604) as sound output
signal in the PCM Codec (IC601).
13.5. LAN BLOCK
Composed of the IC103 (CPU), the IC202 (ETHER-PHY), the T601 (Transformer) and the CN605 (RJ45).
The T605 (Transformer) obtains isolation between the Set and the Ethernet.
The IC103 (CPU) and the IC202 (ETHER-PHY) are connected by a signal called MIIBus and it makes
Ether net data sending and receiving possible.
Sending
The electrical signal sent from the IC103 is converted to Ethernet data at the IC202 and sent from the
CN605 through the T601.
Receiving
The Ethernet data received from the CN605 is converted to electrical data at the IC202 and received to
the IC103.
55