Altera Low Latency Ethernet 10G MAC Manual de usuario Pagina 84
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Signal Operating
Mode
Direction Width Description
tx_156_25_clk 10G, 1G/10G,
10M/100M/
1G/10G
In 1
156.25-MHz clock for the MAC TX
datapath when you choose to
maintain compatibility with the 64-
bit Ethernet 10G MAC on the
Avalon-ST TX data interface or
XGMII. This feature is not available
when the Enable 10GBASE-R
register mode is enabled.
Altera recommends that this clock
and tx_312_5_clk share the same
clock source. This clock must be
synchronous to tx_312_5_clk.
Their rising edges must align and
must have 0 ppm and phase-shift.
tx_rst_n All In 1 Active-low reset for the MAC TX
datapath.
rx_312_5_clk 10G, 1G/10G,
10M/100M/
1G/10G
In 1 312.5-MHz clock for the MAC RX
datapath when the Enable
10GBASE-R register mode is
disabled. You may use the same
clock source for this clock and tx_
312_5_clk.
rx_xcvr_clk 10G In 1 322.265625-MHz clock for the MAC
RX datapath when the Enable
10GBASE-R register mode is
enabled.
rx_156_25_clk 10G, 1G/10G,
10M/100M/
1G/10G
In 1
156.25-MHz clock for the MAC RX
datapath when you choose to
maintain compatibility with the 64-
bit Ethernet 10G MAC on the
Avalon-ST RX data interface or
XGMII. This feature is not available
when the Enable 10GBASE-R
register mode is enabled.
Altera recommends that you use the
same clock source for this clock and
rx_312_5_clk. This clock must be
synchronous to rx_312_5_clk.
Their rising edges must align and
must have 0 ppm and phase-shift.
5-2
Clock and Reset Signals
UG-01144
2014.12.15
Altera Corporation
Interface Signals for LL Ethernet 10G MAC
Send Feedback
- Low Latency Ethernet 10G MAC 1
- Contents 2
- About LL Ethernet 10G MAC 5
- Features 6
- Release Information 7
- Resource Utilization 8
- TX and RX Latency 9
- Related Information 10
- Parameter Settings 13
- Parameter Value Description 13
- Generated Files 15
- Extension Description 15
- Quartus II 17
- Design Flow 17
- Gate-Level Simulation 17
- RTL Simulation 17
- Altera Corporation 19
- Send Feedback 19
- Design Considerations 20
- Pseudo-Static CSR Fields 21
- Clock Crosser 21
- Dual Clock FIFO 22
- Subscribe 23
- Interfaces 24
- Interfaces Description 24
- Figure 3-2: Interface Signals 25
- Padding Bytes Insertion 26
- Address Insertion 26
- CRC-32 Insertion 27
- XGMII Encapsulation 28
- XGMII Transmission 29
- Unidirectional Feature 30
- TX Timing Diagrams 31
- RX Datapath 35
- Address Checking 36
- Frame Type Checking 36
- Length Checking 36
- Frame Length 37
- Payload Length 37
- Overflow Handling 38
- RX Timing Diagrams 38
- IEEE 802.3 Flow Control 39
- Pause Frame Reception 40
- Pause Frame Transmission 40
- Priority-Based Flow Control 41
- PFC Frame Reception 42
- PFC Frame Transmission 42
- Reset Requirements 42
- No Stage Steps 43
- Operating Mode PHY 44
- IEEE 1588v2 47
- Transmit Datapath 48
- Receive Datapath 49
- Frame Format 49
- PTP Packet over UDP/IPv4 50
- PTP Packet over UDP/IPv6 51
- 4 Octets 52
- Register Map 53
- Word Offset Purpose Variation 53
- (10-Gbps Ethernet MAC) 54
- (LL Ethernet 10G MAC) 54
- Register Access 56
- Access Definition 57
- Flow Control Registers 62
- Delay Device PMA Mode 76
- Latency MAC Configurations 76
- ECC Registers 76
- Statistics Registers 77
- Clock and Reset Signals 83
- Signal Operating 83
- Direction Width Description 83
- Unidirectional Signals 86
- Avalon-MM Programming Signals 86
- Avalon-ST Data Interfaces 87
- Avalon-ST Status Interface 90
- PHY-side Interfaces 94
- XGMII RX Signals 97
- GMII TX Signals 98
- GMII RX Signals 99
- MII TX Signals 99
- MII RX Signals 99
- 1588v2 Interfaces 100
- UG-01144 101
- 2014.12.15 101
- Additional Information 107
- Date Version Changes 108
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