C-3E Datasheet, PDF (37/114 Pages) Freescale Semiconductor, Inc – C-3e NETWORK PROCESSOR SILICON REVISION A1

Pin Descriptions Grouped by Function
37
Table 11 Gigabit Ethernet (GMII/MII) Signals One Cluster Example
SIGNAL NAME* PIN #† TOTAL TYPE I/O LABEL
CPn_0
Table 7 1
LVTTL O_PD T_CLK
CPn_1
Table 7 1
LVTTL I_PU TCLKI
CPn_2
CPn_3
CPn_4
CPn_5
CPn_6
Table 7 1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
LVTTL O_PD TXD(0)
LVTTL O_PU TXD(1)
LVTTL O_PD TXD(2)
LVTTL O_PU TXD(3)
LVTTL O_PU TX_EN
CPn+1_0
CPn+1_1
Table 7 1
Table 7 1
nc
nc_PD nc
LVTTL I_PU COL
CPn+1_2
CPn+1_3
CPn+1_4
CPn+1_5
CPn+1_6
Table 7 1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
LVTTL O_PD TXD(4)
LVTTL O_PU TXD(5)
LVTTL O_PD TXD(6)
LVTTL O_PU TXD(7)
LVTTL O_PU TX_ER
CPn+2_0
CPn+2_1
CPn+2_2
CPn+2_3
CPn+2_4
CPn+2_5
CPn+2_6
CPn+3_0
CPn+3_1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
Table 7 1
nc
LVTTL
LVTTL
LVTTL
LVTTL
LVTTL
LVTTL
nc_PD nc
I_PU RCLK
I_PD RXD(0)
I_PU RXD(1)
I_PD RXD(2)
I_PU RXD(3)
I_PU RX_DV
nc
nc_PD nc
LVTTL I_PU CRS
SIGNAL DESCRIPTION
GMII Transmit Clock (125MHz). This clock is used to synchronize the
transmit data.
MII transmit clock. Transmit data aligned to this clock input from
phy in MII mode. 25 Mhz in 100BaseT, 2.5 in Mhz in 10BaseT
Transmit Data (byte-wide data, least significant bit)
Transmit Data
Transmit Data
Transmit Data
Transmit Enable. When asserted, the data on TXD is encoded and
transmitted on the twisted pair cable.
nc
Collision. Asserted when both RX_DV and TX_EN are valid during
half duplex operation.
Transmit Data
Transmit Data
Transmit Data
Transmit Data (byte-wide receive data, most significant bit)
Transmit Error. Asserting TX_ER when TX_EN is a 1 causes
transmission of the designated “bad code” in lieu of the normal
encoded data on the twisted pair data.
nc
Receive Clock (125MHz)
Receive Data (byte-wide receive data, least significant bit)
Receive Data
Receive Data
Receive Data
Receive Data Valid. Indicates that there is a receive frame in progress
and that the data present on the RXD signals is valid.
nc
Carrier Sense. Indicates traffic is on the link. CRS is asserted when a
non-idle condition is detected on the receive data stream. CRS is
deasserted when an end of frame or idle condition is detected.
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