
11–16 Chapter 11: Deterministic Latency PHY IP Core
Clock Interface
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
Table 11–14 describes the differential serial data interface and the status signals for the
transceiver serial data interface.
Clock Interface
Table 11–15 describes clocks for the Deterministic Latency PHY. The input reference
clock,
pll_ref_clk
, drives a PLL inside the PHY-layer block, and a PLL output clock,
rx_clkout
is used for all data, command, and status inputs and outputs.
Optional TX and RX Status Interface
Table 11–16 describes the optional status signals for the RX interface.
Table 11–14. Serial Interface and Status Signals
(1)
Signal Name Direction Signal Name
rx_serial_data[<n>-1:0]
Input Receiver differential serial input data.
tx_serial_data[<n>-1:0]
Output Transmitter differential serial output data.
Note to Table 11–14:
(1) <n> is the number of lanes.
Table 11–15. Clock Signals
Signal Name Direction Description
pll_ref_clk
Input
Reference clock for the PHY PLLs. Frequency range is
60–700 MHz.
Table 11–16. Serial Interface and Status Signals (Part 1 of 2)
(1)
Signal Name Direction Signal Name
tx_ready
Output
When asserted, indicates that the TX interface has exited
the reset state and is ready to transmit.
rx_ready
Output
When asserted, indicates that the RX interface has exited
the reset state and is ready to receive.
pll_locked[<p>-1:0]
Output
When asserted, indicates that the PLL is locked to the input
reference clock.
rx_bitslipboundaryselectout
[(<n>5)-1:0]
Output
Specifies the number of bits slipped to achieve word
alignment. In 3G (10-bit) mode, the output is the number of
bits slipped. If no bits were slipped, the output is 0. In 6G
(20-bit) mode, the output is (19
the number of bits
slipped). If no bits were slipped, the output is 19. The
default value of
rx_bitslipboundaryselectout[4:0]
before alignment is achieved is 5'b01111 in 3G mode and
5'b11111 in 6G mode.
Optional Status Signals
tx_bitslipboundaryselect
[(<n>5)-1:0]
Input
This signal is used for bit slip word alignment mode. It
selects the number of bits that the TX block must slip to
achieve a deterministic latency.
rx_disperr[(<n>(<d>/<s>)-1:0]
Output
When asserted, indicates that the received 10-bit code or
data group has a disparity error.
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