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Chapter 10: Transceiver Reconfiguration Controller 10–27
Procedures for Reconfiguration
March 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Procedures for Reconfiguration
As Table 10–1 indicates, some features can only be reconfigured using register-based
accesses, some features can only be reconfigured using MIF-based accesses, and some
features can be reconfigured using either access mode. The following sections discuss
both modes.
Changing Transceiver Settings Using Register-Based Reconfiguration
In register-based mode, you use a sequence of Avalon-MM writes and reads to update
individual transceiver settings. The following section describes how to perform a
register-based reconfiguration read and write.
Register-Based Write
Complete the following steps to perform a register-based write:
1. Read the
control and status
register
busy
bit (bit 8) until it is clear.
2. Write the logical channel number of the channel to be updated to the
logical
channel
number
register.
3. Write the <feature> offset address.
4. Write the appropriate data value to the
data
register.
5. Write the
control
and
status
register
write
bit to 1’b1.
6. Read the
control
and
status
register
busy
bit. Continue to read the busy bit while
its value is one.
7. When
busy
= 0, the Transceiver Reconfiguration Controller has updated the logical
channel specified in Step 2 with the data specified in Step 3.
Example 10–2 shows a reconfiguration that changes the logical channel o V
OD
setting
to 40.
Register-Based Read
Complete the following steps for a read:
1. Read the
control and status
register
busy
bit (bit 8) until it is clear.
2. Write the logical channel number of the channel to be read to the
logical
channel
number
register.
3. Write the <feature> offset address.
Example 10–2. Register-Based Write of Logical Channel 0 V
OD
Setting
#Setting logical channel 0
write_32 0x8 0x0
#Setting offset to VOD
write_32 0xB 0x0
#Setting data register to 40
write_32 0xC 0x28
#Writing all data
write_32 0xA 0x1
- User Guide 1
- Contents 3
- Chapter 7. Custom PHY IP Core 5
- Contents vi 6
- 1. Introduction 9
- Stratix V Device 10
- Reset Controller 11
- Avalon-MM PHY Management 11
- 1–4 Chapter 1: Introduction 12
- Unsupported Features 13
- 1–6 Chapter 1: Introduction 14
- 2. Getting Started 15
- Note to Figure2–2: 16
- Simulate the IP Core 18
- 3. 10GBASE-R PHY IP Core 19
- Release Information 20
- Note to Table 3–1: 21
- Stratix IV Devices 23
- Stratix V Devices 24
- SDR XGMII TX Interface 30
- Note to Table 3–9: 30
- SDR XGMII RX Interface 31
- Note to Table 3–11: 31
- Status Interface 32
- Clocks, Reset, and Powerdown 32
- Serial Interface 35
- Note to Table 3–15: 35
- TimeQuest Timing Constraints 40
- Note to Figure4–1: 43
- Note to Table 4–1: 44
- Advanced Options 51
- Configurations 52
- PMA Channel Controller 58
- Stratix IV GX Devices 65
- 5. Interlaken PHY IP Core 67
- Analog Settings 70
- Note to Figure5–2: 74
- Avalon-ST TX Interface 75
- Avalon-ST RX Interface 76
- PLL Interface 78
- TX and RX Serial Interface 78
- Optional Clocks for Deskew 78
- Transceiver Reconfiguration 81
- General Options 84
- Note to Figure6–2: 90
- PIPE Interface 92
- Note to Table 6–8: 93
- Transceiver Serial Interface 94
- Registers 95
- 7. Custom PHY IP Core 101
- Device Family Support 102
- Parameter Settings 103
- Word Alignment 106
- Rate Match FIFO 107
- 8B/10B Encoder and Decoder 108
- Byte Ordering 108
- PLL Reconfiguration 109
- Analog Options 110
- Presets for Ethernet 114
- Interfaces 115
- Note to Figure7–2: 116
- Clock Interface 118
- Status Signals (Optional) 118
- Note to Table 7–17: 119
- Register Interface 120
- Register Descriptions 121
- Dynamic Reconfiguration 124
- 8. Low Latency PHY IP Core 125
- Note to Table 8–4: 129
- Note to Table 8–5: 130
- Serial Data Interface 137
- Optional Status Interface 138
- PMA and Light-Weight PCS 139
- Arria V or Stratix V FPGA 143
- Auto-Negotiation 144
- Delay Estimation Logic 145
- Note to Figure9–2: 145
- Delay Numbers 146
- Note to Table 9–4: 147
- Additional Options 150
- TX and RX Status Signals 159
- Deterministic PHY IP Core 161
- Controller 167
- Note to Figure10–1: 169
- Note to Table 10–6: 174
- Embedded 175
- Offset Cancellation 176
- Duty Cycle Calibration 176
- PMA Analog Controls 177
- Pre-CDR Reverse Serial 178
- Loopback 178
- Post-CDR Reverse Serial 178
- ATX PLL Calibration 183
- Channel Reconfiguration 187
- Streamer Module 188
- Stratix V MIF 191
- Register-Based Write 193
- Register-Based Read 193
- Direct Write Reconfiguration 195
- Figure 10–6. Sample MIF 196
- Example 10–5. (continued) 197
- Notes to Figure 10–14: 205
- Transceiver 206
- XAUI PHY 209
- Port Differences 210
- Note to Table 11–3: 212
- Note to Table 11–5: 215
- Custom PHY 216
- Note to Table 11–6: 217
- Note to Table 11–7: 218
- Additional Information 219
- Revision History 220
- Note to Table: 228
- Typographic Conventions 229
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