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Chapter 1: Introduction 1–3
PCS
December 2010 Altera Corporation Altera Transceiver PHY IP Core User Guide
The following sections provide a brief introduction to each of the modules illustrated
in Figure 1–1.
PCS
The PCS implements part of the physical layer specification for networking protocols.
Depending upon the protocol that you choose, the PCS may include many different
functions. Some of the most commonly included functions are: 8B/10B, 64b/66b, or
64b/67b encoding and decoding, rate matching and clock compensation, scrambling
and de-scrambling, word alignment, phase compensation, error monitoring, and
gearbox.
PMA
The PMA receives and transmits differential serial data on the device external pins.
The transmit (TX) channel supports programmable pre-emphasis and programmable
output differential voltage (V
OD
). It converts parallel input data streams to serial
data.The RX channel supports offset cancellation to correct for process variation and
programmable equalization. It converts serial data to parallel data for processing in
the PCS. The PMA also includes a clock data recovery (CDR) module with separate
CDR logic for each RX channel.
Reset Controller
The reset controller manages signals to reset and power down the PHY channels and
PLLs. The PHY channels operate in two modes: bonded and non-bonded. In bonded
mode, a single Clock Generation Buffer (CGB) divides the output it receives from the
TX PLL to create the parallel clock inputs the TX channel PMA and PCS modules. The
parallel clocks for each channel are carefully tuned to keep the clock skew below 150
ps. Figure 1–2 illustrates bonded mode for Stratix V devices.
- User Guide 1
- Contents 3
- Chapter 7. Custom PHY IP Core 4
- 1. Introduction 7
- PHY - Stratix V 8
- Reset Controller 9
- Transceiver 10
- Channel PLL 10
- Figure 1–4 12
- Note to Table 1–2: 12
- Transceiver PHY 13
- Avalon-MM PHY Management 14
- Serial Loopback 14
- Unsupported Features 14
- 2. Getting Started 15
- Specifying Parameters 16
- Simulate the IP Core 18
- 3. 10GBASE-R PHY IP Core 19
- Stratix V FPGA 20
- Release Information 21
- Device Family Support 21
- Parameter Settings 22
- Interfaces 23
- SDR XGMII TX Interface 24
- SDR XGMII RX Interface 25
- Avalon-MM Interface 26
- Status Interface 29
- Clocks, Reset, and Powerdown 29
- Table 3–12. Clock Signals 31
- TimeQuest Timing Constraints 32
- 4. XAUI PHY IP Core 35
- Configurations 38
- PMA Channel Controller 48
- (Optional) 48
- ■ 1–enables serial loopback 49
- ■ 0–disables serial loopback 49
- 5. Interlaken PHY IP Core 53
- Interface 55
- Avalon-ST TX Interface 56
- Avalon-ST RX Interface 57
- PLL Interface 60
- TX and RX Serial Interface 60
- Optional Clocks for Deskew 61
- ■ The simulation language 62
- ■ The name of your testbench 62
- Simulation Testbench 63
- Resource Utilization 66
- PCI Express PIPE 69
- Hard PCS and PMA 69
- PHY Management Signals 70
- PIPE Interface 73
- ■ 1'b0: -6 dB 73
- ■ 1'b1: -3.5 dB 73
- Note to Table 6–8: 74
- Transceiver Serial Interface 75
- Simulation 76
- 7. Custom PHY IP Core 79
- General Options 80
- 8B/10B Encoder and Decoder 82
- Word Alignment 83
- Rate Match FIFO 84
- Byte Ordering 85
- Custom PHY PCS and PMA 88
- Custom PHY IP Core 88
- Clock Interface 91
- Optional Status Signals 92
- Note to Table 7–14: 93
- 8. Low Latency PHY IP Core 95
- Note to Table 8–3: 98
- ■ 0–0 dB 99
- ■ 1–3 dB 99
- ■ 2–6 dB 99
- ■ 3–9 dB 99
- ■ 4–12 dB 99
- PMA and Light-Weight PCS 100
- Register Descriptions 101
- Serial Data Interface 102
- Optional Status Interface 102
- Controller 103
- Parameter Differences 107
- Port Differences 108
- XAUI PHY 109
- PCI Express PHY (PIPE) 112
- Note to Table 10–4: 113
- Custom PHY 116
- Additional Information 117
- Info–2 Additional Information 118
- Revision History 118
- ■ Initial release 119
- Info–4 Additional Information 120
- Typographic Conventions 120
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