CN7221 Datasheet, PDF (3/18 Pages) Conexant Systems, Inc – Home Networking Physical Layer Device with Integrated Analog Front End Circuitry

Home Networking PHY with Integrated AFE
Typical Application
V.90 DSP
(optional)
V.90 CODEC
DAA
LANfinity™ CN7221
RJ-11
RS7112
P
Multifunction
C
Controller
I
(Ethernet MAC/V.90
Modem Combination)
7-Wire Serial I/F
(7WS)
CN7221
Home Networking PHY
with Integrated AFE
Media Independent I/F
(MII)
Ethernet 10 Mbps or
100 Mbps PHY/
Transceiver
RJ-45
Figure 1. Typical Application
LAN-056_CN7221_f1
Description
The typical application shown in Figure 1 displays a
multifunction PCI Network Interface Card (NIC). The NIC
incorporates the RS7112 Home Networking Controller, the
CN7221 Home Networking PHY with Integrated AFE, and a
V.90 56 Kbps host-controlled modem. The RS7112’s 7-
wire serial interface (7WS) is used to support the CN7221.
Home Networking
The home phoneline network is an Ethernet-compatible
LAN running over the random-tree wiring found in nearly
all homes. It does not require any hubs, routers, splitters,
filters or terminations. Initial products are PC network
interface cards, which will interface home computers
directly to the network via an in-home telephone jack.
Home phoneline networking will also work with current
Internet access technologies, such as cable modems, V.90
and ADSL.
LAN-056, Rev. A
Conexant
3
PROPRIETARY INFORMATION