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Chapter 4: Backplane Ethernet 10GBASE-KR PHY IP Core 4–5
Parameters and Speed Negotiation Parameters
November 2012 Altera CorporationAltera Transceiver PHY IP Core
User Guide
Table 45 describes the Auto-Negotiation parameters.
Parameters and Speed Negotiation Parameters
Table 46 describes the parameters to specify 10GBASE-R PCS.
PREMAINVAL 0-63
Specifies the Preset V
OD
Value. Set by the Preset command as defined in
Clause 72.6.10.2.3.1 of the link training protocol. This is the value from
which the algorithm starts. The default value is 60.
PREPOSTVAL 0-31 Specifies the preset Post-tap value. The default value is 0.
PREPREVAL 0-15 Specifies the preset Pre-tap Value. The default value is 0.
INITMAINVAL 0-63
Specifies the Initial V
OD
Value. Set by the Initialize command in Clause
72.6.10.2.3.2 of the link training protocol. The default value is 35.
INITPOSTVAL 0-31 Specifies the initial t Post-tap value. The default value is 14.
INITPREVAL 0-15 Specifies the Initial Pre-tap Value. The default value is 3.
Table 4–4. Link Training
Name Range Description
Table 4–5. Auto-Negotiation Settings
Name Range Description
Enable Auto Negotiation On/Off
When you turn this option On, Auto Negotiation as defined in Clause 73
of the IEEE Std 802.3ap-2007 is enabled.
Pause Ability–C0 On/Off
When you turn this option On, the core supports symmetric pauses as
defined in Annex 28B of Section 2 of IEEE Std 802.3-2008.
Pause Ability–C1 On/Off
When you turn this option On, the core supports asymmetric pauses as
defined in Annex 28B of Section 2 of IEEE Std 802.3-2008.
Table 4–6. 10GBASE-R Parameters
Parameter Name Options Description
Enable IEEE 1588 Precision
Time Protocol
On/Off
When you turn this option On, the core includes logic to implement the
IEEE 1588 Precision Time Protocol.
Reference clock frequency
644.53125MHz
322.265625MHz
Specifies the clock frequency for the 1GBASE-KR PHY IP Core. The
default is 322.265625MHz.
PLL Type
ATX
CMU
Specifies the PLL type. You can specify either a CMU or ATX PLL. The
ATX PLL has better jitter performance at higher data rates than the CMU
PLL. Another advantage of the ATX PLL is that it does not use a
transceiver channel, while the CMU PLL does.
Enable additional control and
status pins
On/Off
When you turn this option On, the core includes the
rx_block_lock
and
rx_hi_ber
ports.
Enable rx_recovered_clk pin On/Off
When you turn this option On, the core includes the
rx_recovered_clk
port.
Enable pll_locked status port On/Off When you turn this option On, the core includes the
pll_locked
port.
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