EA218E Datasheet, PDF (19/28 Pages) Zarlink Semiconductor Inc – EA218E 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset

PRELIMINARY
XpressFlow-2020 Series –
Ethernet Switch Chipset
INFORMATION
EA218E
8-Port 10Mb Ethernet Access Controller
2.4 10Mb Serial Interface for Port 0 through 7
Fully compliant with IEEE 802.3 10M bit Serial Interface Stan-
dard for connecting with external 10Mbps Ethernet Physical
Layer Transceiver
Supports 10Mbps 10BaseT serial interface
Supports both half and full duplex operation
2.4.1 Pin Description
Symbol
Tn_RXD
Tn_RXC
Tn_TXC
Tn_TXEN
Tn_TXD
Tn_LPBK
Tn_FD
Tn_COL
Tn_CRS
Tn_LNK
Type
TTL In
(5VT)
TTL In
(5VT)
TTL In
(5VT)
CMOS
Output
CMOS
Output
CMOS
Output
CMOS
Output
TTL In
(5VT)
TTL In
(5VT)
TTL In
(5VT)
Name and Functions
Receive Data – (one for each 10M bit Serial Interface Port) a receive data stream.
Receive Clock – (one for each 10M bit Serial Interface Port) from external phy for sampling the
receive data from Tn_RXD input
Transmit Clock – (one for each 10M bit Serial Interface Port) a continuous clock input with
35% to 65% duty cycles.
Transmit Enable – (one for each 10M bit Serial Interface Port)
Transmit Data – (one for each 10M bit Serial Interface Port) a transmit data stream.
Loop Back Enable – (one for each 10M bit Serial Interface Port) The polarity of this signal is
programmable via Port Configuration Register
Full Duplex Mode – (one for each 10M bit Serial Interface Port) The polarity of this signal is
programmable via Port Configuration Register
Collision Detected – (one for each 10M bit Serial Interface Port)
Carrier Sense – (one for each 10M bit Serial Interface Port)
Link Status – (one for each 10M bit Serial Interface Port) The polarity of this signal is pro-
grammable via Port Configuration Register
Note:
“n” is the port number [7:0]
These signals have programmable output polarity.
TXC
TXEN
TXD
100 nsec
10M bit Serial Interface – Transmit Timing
© 1998 Zarlink Semiconductor, Inc.
18
Rev.2.1 – February, 1999