88E1111 Product Brief
Integrated 10/100/1000 Ultra Gigabit Ethernet Transceiver
Table 7:
1.25 GHz Serial High Speed Interface
117-TFBGA 96-BCC 128-PQFP Pin Name
Pin
Description
Pin #
Pin #
Pin #
Type
A3
A4
82
81
113
112
S_IN+
S_IN-
I
1.25 GHz input - Positive and Negative.
When this interface is used as a MAC inter-
face, the MAC transmitter’s positive output
connects to the S_IN+. The MAC transmit-
ter’s negative output connects to the S_IN-.
When this interface is used as a fiber inter-
face, the fiber-optic transceiver’s positive
output connects to the S_IN+. The fiber-optic
transceiver’s negative output connects to the
S_IN-.
Input impedance on the S_IN± pins may be
programmed for 50 ohm or 75 ohm imped-
ance by setting register 26.6. The input
impedance default setting is determined by
the 75/50 OHM configuration pin.
A5
A6
79
80
110
109
S_CLK+/SD+
S_CLK-/SD-
I
Signal Detect input.
For Serial Interface modes the S_CLK± pins
become Signal Detect± (SD±) inputs.
A7
A8
77
75
107
105
S_OUT+
S_OUT-
O, Z
1.25 GHz output − Positive and Negative.
When this interface is used as a MAC inter-
face, S_OUT+ connects to the MAC
receiver’s positive input. S_OUT- connects
to the MAC receiver’s negative input.
When this interface is used as a fiber inter-
face, S_OUT+ connects to the fiber-optic
transceiver’s positive input. S_OUT- con-
nects to the fiber-optic transceiver’s negative
input.
Output impedance on the S_OUT± pins may
be programmed for 50 ohm or 75 ohm
impedance by setting register 26.5. Output
amplitude can be adjusted via register
26.2:0. The output impedance default setting
is determined by the 75/50 OHM configura-
tion pin.
B3
91
125
RXD[3]
O, Z
Serial MAC interface Copper Link Status[1]
connection.
1 = Copper link up
0 = Copper link down
Doc. No. MV-S105540-00, Rev. --
Page 20
Copyright © 2009 Marvell
Document Classification: Proprietary Information
March 4, 2009, Advance
MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
