MEA-224 Zarlink Semiconductor, Inc., MEA-224 Datasheet - Page 20

• Manufacturer Part Number: MEA-224
• Description: 4-Port, Layer 2 Fast Ethernet Access Controller
• Manufacturer: Zarlink Semiconductor, Inc.

XpressFlow-2001 Series –
Ethernet Switch Chip-set
4.4.2 PIN Mapping between MII Interface and 10Mbps Serial Interface
4.5 Test Facility
©
1997
Note: “m” is the port number [3:0].
Mm_RXD[3:1] TTL In
Mm_RXD[0]
Mm_RXDV
Mm_RXC
Mm_RXER
Mm_TXER
Mm_TXC
Mm_TXEN
Mm_TXD[0]
Mm_TXD[1]
Mm_TXD[2]
Mm_TXD[3]
Mm_COL
Mm_CRS
Mm_LNK
T_MODE
(57(; (7:25.6
Symbol
Symbol
MII Interface
P R E L I M I N A R Y
These signals have programmable output polarity.
CMOS
Output
CMOS
Output
CMOS
Output
CMOS
Output
CMOS
Output
CMOS
Output
CMOS
TTL In
TTL In
TTL In
TTL In
TTL In
TTL In
TTL In
TTL In
I/O TS
(5VT)
(5VT)
(5VT)
(5VT)
(5VT)
(5VT)
(5VT)
(5VT)
(5VT)
Type
Type
Tm_RXD
Tm_RXC
Tm_TXC
Tm_TXEN
Tm_TXD
Tm_LPBK
Tm_FD
Tm_COL
Tm_CRS
Tm_LNK
Name & Functions
Test Mode Selection & Test Output – Set Test Mode upon Reset, and
provides test status output during test mode
Symbol
4-Port 10/100M Ethernet Access Controller
Page: 20
TTL In
TTL In
TTL In
CMOS
Output
CMOS
Output
CMOS
Output
CMOS
Output
TTL In
TTL In
TTL In
(5VT)
(5VT)
(5VT)
(5VT)
(5VT)
(5VT)
Type
D A T A
10Mbps Serial Interface
Name & Functions
Not used by Serial Interface Ports. Has a weak
internal pull-up resistor.
Receive Data – (one for each Serial Interface
Port) a receive data stream.
Not used by Serial Interface Ports. Has a weak
internal pull-up resistor.
Receive Clock – (one for each Serial Interface
Port)
Not used by Serial Interface Ports. Has a weak
internal pull-up resistor.
Not used by Serial Interface Ports.
Transmit Clock – (one for each Serial Inter-
face Port) a continuous clock input with 35% to
65% duty cycles.
Transmit Enable – (one for each Serial Inter-
face Port)
Transmit Data – (one for each Serial Interface
Port) a transmit data stream.
Not used by Serial Interface Ports
Loop Back Enable – (one for each Serial In-
terface Port) The polarity of this signal is pro-
grammable via Port Configuration Register
Full Duplex Mode – (one for each Serial In-
terface Port) The polarity of this signal is pro-
grammable via Port Configuration Register
Collision Detected – (one for each Serial In-
terface Port)
Carrier Sense – (one for each Serial Interface
Port)
Link Status – (one for each Port) The polarity
of this signal is programmable via Port Configu-
ration Register
S H E E T
Rev. 4.0 –December, 1997
EA-224