Altera Low Latency Ethernet 10G MAC Uživatelský manuál Strana 93
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Hodnocené. / 5. Na základě hodnocení zákazníků
Signal Direction Width Description
avalon_st_rxstatus_
data[]
Out 40
Contains information about the RX frame.
• Bits 0 to 15: Payload length.
• Bits 16 to 31: Packet length.
• Bit 32: When set to 1, indicates a stacked VLAN
frame. Ignore this bit when the MAC is
configured not to detect stacked VLAN frames
(tx_vlan_detection[0] = 1).
• Bit 33: When set to 1, indicates a VLAN frame.
Ignore this bit when the MAC is configured not
to detect VLAN frames (tx_vlan_
detection[0] = 1).
• Bit 34: When set to 1, indicates a control frame.
• Bit 35: When set to 1, indicates a pause frame.
• Bit 36: When set to 1, indicates a broadcast
frame.
• Bit 37: When set to 1, indicates a multicast
frame.
• Bit 38: When set to 1, indicates a unicast frame.
• Bit 39: When set to 1, indicates a PFC frame.
avalon_st_rxstatus_
error[]
Out 7
When set to 1, the respective bit indicates the
following error type in the RX frame.
• Bit 0: Undersized frame.
• Bit 1: Oversized frame.
• Bit 2: Payload length error.
• Bit 3: CRC error.
• Bit 4: Unused.
• Bit 5: Unused.
• Bit 6: PHY error.
The IP core presents the error status on this bus in
the same clock cycle it asserts the avalon_st_
rxstatus_valid signal. The error status is invalid
when an overflow occurs.
avalon_st_rx_pfc_
status_valid
Out 1 When asserted, this signal qualifies the avalon_st_
rx_pfc_status_data[] signal.
UG-01144
2014.12.15
Avalon-ST RX Status Signals
5-11
Interface Signals for LL Ethernet 10G MAC
Altera Corporation
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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