User guide

5–4 Chapter 5: Interlaken PHY IP Core
Interface
Altera Transceiver PHY IP Core User Guide December 2010 Altera Corporation
f For more information about _hw.tcl, files refer to the Component Interface Tcl Reference
chapter in Volume 4 of the Quartus II Handbook.
The following sections describe the signals in each interface.
Avalon-ST TX Interface
Table 5–4 lists the signals in the Avalon-ST TX interface.
Figure 5–2. Top-Level Interlaken Signals (Note 1)
Note to Figure5–2:
(1) < n > = the number of channels in the interface, so that the width of tx_data in 4-channel instantiation is [263:0].
tx_parallel_data<n>[65:0]
tx_ready
tx_datain_bp<n>
tx_clkout<n>
tx_user_clkout
rx_parallel_data<n>[71:0]
rx_ready
rx_clkout<n>
rx_fifo_clr<n>
rx_dataout_bp<n>
phy_phy_mgmt_clk
phy_mgmt_clk_reset
phy_mgmt_address[8:0]
phy_mgmt_writedata[31:0]
phy_mgmt_readdata[31:0]
phy_mgmt_write
phy_mgmt_read
phy_mgmt_waitrequest
pll_ref_clk
Interlaken Top-Level Signals
tx_serial_data<n>
rx_serial_data<n>
Avalon-ST
TX to/ from
MAC
High Speed
Serial I/O
PLL
Avalon-MM PHY
Management
Interface
Avalon-ST
RX from/to
MAC
tx_coreclkin
rx_coreclkin
For Deskew
(Optional)
Table 5–4. Avalon-ST TX Signals
Signal Name Direction Description
tx_parallel_data[63:0] Sink Avalon-ST data driven from the FPGA fabric.
tx_parallel_data[64] Sink
Indicates whether
tx_parallel_data[63:0] represents command or
data. When 0,
tx_parallel_data[63:0] is data. When 1,
tx_parallel_data[63:0] is control.
tx_parallel_data[65] Sink When asserted, indicates that tx_parallel_data[63:0] is valid.
tx_ready Source When asserted, indicates that the TX interface has exited the reset state.
tx_datain_bp Source
When asserted, indicates that this Avalon-ST sink interface is ready to
receive data. The
readyLatency on this Avalon-ST interface is 0 cycles;
consequenty, the application drives
tx_parallel_data[63:0] as soon as
tx_ready is asserted. ( tx_datain_bp is connected to the ~partialfull
of the TX FIFO, so that when tx_datain_bp is deasserted the TX FIFO is
almost full and back pressures the MAC.)