80220 Datasheet, PDF (7/91 Pages) LSI Computer Systems – 100BASE-TX/10BASE-T Ethernet Media Interface Adapter

80220/80221
Pin Description continued
Pin# Pin
44L 64L ^Name
I/O Description
5 61 PLED0
(MDA0)
I/O
Pullup
Programmable LED Output/Management Interface Address Input. The default
function of this pin is to be a 10 Mbps Link Detect output. This pin can also be
programmed through the MI serial port to indicate other events or be user controlled.
This pin can drive an LED from both VCC and GND.
When programmed as 10 Mbps Link Detect Output (default):
1 = No Detect
0 = 10 Mbps Link Detected
During powerup or reset, this pin is high impedance and the value on this pin is latched
in as the address MDA0 for the MI serial port.
38 45 TRFADJ1 I Twisted Pair Output Rise/Fall Time adjust Input. These digital inputs adjust the
39 46 TRFADJ0 Pullup rise/fall time on the TPO± outputs.
Pulldown
11 = Rise/Fall Time Changed -0.25 nS
10 = Rise/Fall Time Changed in MI Serial Port (Default = 0.0 nS)
01 = Rise/Fall Time Changed +0.25 nS
00 = Rise/Fall Time Changed +0.50 nS
26 27 RX_EN/
JAM
I
Receive Enable Input
1 = All Outputs Enabled
0 = Receive Controller Outputs are High Impedance
(RX_CLK, RXD[3:0], RX_DV, RX_ER, COL).
I
Automatic Jam Input
1 = Normal
0 = Jam Packet Transmitted when Receive Activity Detected
— 63 PLED5
O Receive LED Output. The function of this pin is to be a Receive
O.D. Activity Detect output and this pin can drive an LED from VCC.
Pullup
— 2 PLED4
O
O.D.
Pullup
1 = No Receive Activity
0 = Receive Packet Occurred, Hold Low for 100 mS
Transmit LED Output. The function of this pin is to be a Transmit
Activity Detect output and this pin can drive an LED from VCC.
— 30 T4ADV
— 29 T4OE
— 24 RPTR
1 = No Transmit Activity
0 = Transmit Packet Occurred, Hold Low for 100 mS
I
100Base-T4 AutoNegotiation Advertise Input. This input causes the AutoNegotiation
Pulldown algorithm to advertise 100Base-T4 as one of the operating modes.
1 = Advertise 100Base-T4 Capability During AutoNegotiation
0 = No Advertise
O 100Base-T4 Output Enable. This output indicates that the AutoNegotiation algorithm
has selected 100Base-T4 as the operating mode and can be used to enable and external
100Base-T4 PHY. When asserted, the TP outputs are high impedance.
I
Repeater Mode Enable Input.
Pulldown 1 = Repeater Mode Enabled
0 = Normal Operation
4-77
MD400159/E