C5ENPB0-DS Datasheet, PDF (37/118 Pages) Freescale Semiconductor, Inc – C-5e Network Processor Silicon Revision B0

Pin Descriptions Grouped by Function
37
Table 9 10/100 Ethernet Signals (continued)
SIGNAL NAME* PIN # TOTAL TYPE I/O
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
LVTTL O_PU
LVTTL I_PD
LVTTL I_PU
LVTTL O_PU
TOTAL PINS
7
* _{n can be from 0 to 15. See Table 7.}
LABEL
TXD(0)
TXD(1)
RXD(0)
RXD(1)
TX_EN
SIGNAL DESCRIPTION
Transmit Data 0 (first on wire)
Transmit Data 1 (second on wire)
Receive Data 0 (first on wire)
Receive Data 1 (second on wire)
Transmit Enable. When asserted, the data on TXD is encoded and
transmitted on the twisted pair cable.
Gigabit Ethernet (GMII) Configuration
Gigabit Ethernet Media Independent Interface (GMII) is configured in one of two ways:
• Use one CP cluster when density is more important than wire-speed performance
because you can then implement up to four Gigabit Ethernet ports per C-5e NP.
• Use two CP clusters for wire-speed performance and additional processing power. You
can implement up to two Gigabit Ethernet ports per C-5e NP.
Table 10 lists the possible CP cluster combinations you can use and Figure 4 shows receive
and transmit pin configurations by cluster. Table 11 lists the signals and pinouts for
Gigabit Ethernet (GMII).
Table 10 Transmit and Receive Pin Combinations for Gigabit Ethernet and Fibre Channel
CLUSTER SINGLE CLUSTER MODE (TBI OR GMII)
0
Port 1 Tx and Rx
TWO CLUSTER MODE (GMII)*
Port 1 Tx
1
Port 2 Tx and Rx
2
Port 3 Tx and Rx
Port 1 Rx
Port 2 Tx
3
Port 4 Tx and Rx
Port 2 Rx
* _{The Two Cluster Mode column lists typical configurations. Any cluster can be set up to either receive}
or transmit. So you could configure a dual cluster mode where cluster 0 receives and cluster 3
transmits.
FREESCALE SEMICONDUCTOR
C5ENPB0-DS REV 08