Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Manual do Utilizador Página 150
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Addr Name Bit Description HW Reset
Value
Access
0xB05 RX_PTP_CLK_
PERIOD
[19:0] clk_rxmac clock period.
Bits [19:16]: nanoseconds
Bits [15:0]: fraction of nanosecond
This value is
set to the
correct clock
period for the
required RX
MAC clock
frequency.
The clock
period is
different for
40GbE
variations and
100GbE
variations.
RW
Related Information
• 1588 Precision Time Protocol Interfaces on page 3-38
• PTP Transmit Functionality on page 3-43
Ethernet Glossary
Table 3-32: Ethernet Glossary
Provides definitions for some terms associated with the Ethernet protocol.
Term Definition
BIP Bit Interleaved Parity. A diagonal parity field which is carried in the periodic
alignment markers on each virtual lane, allowing isolation of a bit error to a
physical channel.
CAUI 100 gigabit attachment unit interface. (C is the symbol in Roman Numerals for
100). This is an electrical interface that which is based on a 10-lane interface with
a bandwidth of 10 Gbps per lane. (In this implementation, the PMA multiplexes
the 20 PCS lanes into 10 physical lanes.
CGMII 100 gigabit media independent interface. (C is the symbol in Roman Numerals
for 100). This is the byte-oriented interface protocol that connects the PCS and
MAC.
DIC Deficit Idle Counter. A rule for inserting and deleting idles as necessary to
maintain the average IPG. The alternative is to always insert idles which could
lead to reduced bandwidth.
FCS Frame Check Sequence. A CRC-32 with bit reordering and inversion.
UG-01172
2015.05.04
Ethernet Glossary
3-105
Functional Description
Altera Corporation
Send Feedback
- 101 Innovation Drive 1
- San Jose, CA 95134 1
- Contents 2
- Features 6
- Device Family Support 8
- IP Core Verification 9
- Simulation Environment 10
- Compilation Checking 10
- Hardware Testing 10
- Variation 11
- A B C D E F 11
- Parameter 11
- Release Information 14
- Getting Started 15
- OpenCore Plus IP Evaluation 17
- IP Core Parameters 19
- Parameter Type Range Default 23
- Parameter Description 23
- File Name Description 29
- Pin Assignments 32
- External TX MAC PLL 35
- File Names Description 38
- Initializing the IP Core 45
- Functional Description 46
- High Level System Overview 47
- Address Insertion 49
- Length/Type Field Processing 49
- Frame Padding 50
- Client Interface 51
- Data Bus Width (Bits) 51
- Three unusable words 57
- Order of Transmission 59
- RX CRC Forwarding 63
- Inter-Packet Gap 63
- Pause Ignore 63
- Control Frame Identification 64
- Name Direction Description 65
- Low Latency 100GbE CAUI–4 PHY 72
- External Transceiver PLL 72
- Pause Control Frame Filtering 76
- Statistics Counters Interface 79
- Name Signal 80
- Direction 80
- Description 80
- OctetOK Count Interface 82
- Transparent Clock Mode 85
- PTP Receive Functionality 87
- PTP Transmit Functionality 88
- 1588 PTP Interface Signals 90
- PTP Timestamp Formats 92
- PHY Status Interface 93
- Control and Status Interface 94
- Signal Name Description 97
- UG-01172 100
- 2015.05.04 100
- Related Information 108
- Software Interface: Registers 109
- PHY Registers 112
- LL 40GBASE-KR4 Registers 116
- Pause Registers 130
- TX Statistics Registers 137
- RX Statistics Registers 143
- 1588 PTP Registers 148
- Ethernet Glossary 150
- Term Definition 151
- Altera Corporation 153
- Send Feedback 153
- Arria 10 10GBASE-KR Registers 160
- 0x4D6 to 181
- MAC+PHY KR solution 181
- Subscribe 182
- Additional Information 187
- Date Compatible ACDS 188
- How to Contact Altera 194
- Typographic Conventions 195
- Visual Cue Meaning 196
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