10
BL-C230A
4.1.2. LAN Block
Consists of IC101 (CPU), IC301 (ETHER-PHY), T901 (Trans) and JK901 (RJ45).
T901 (Trans) insulates sets and Ethernet.
ETHER-PHV (IC301)
Operating Power Supply: 3.3 V
Package: 32 pin QFN
IC101 (CPU) and IC301 (ETHER-PHY) are connected by a signal called MIIBus which it makes it possible to transmit/receive
Ethernet data.
IC301 has Auto Negotiation Function which changes 100BASE-T or 10BASE-TX automatically.
Transmitting Operation
Electric signal from IC101 is changed to Ethernet data on IC301 and it is sent through T901 from JK901.
Receiving Operation
Ethernet data from JK901 is change to electrical signal on IC301 and it is received by IC101.
JK901 is including the Power Supply (DC9 V) from the Power Supply Unit which is different from the Ethernet data mentioned
above.
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