
Chapter 16: Transceiver Reconfiguration Controller IP Core 16–19
Turning on DFE One-Time Adaptation Mode
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Example 16–1the steps to turn on adaptive DFE.
Turning on DFE One-Time Adaptation Mode
Complete the following steps to turn on DFE one-time adaptation mode:
1. Read the DFE
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 DFE
logical
channel number
register.
3. Write the
DFE_offset
address of 0xB.
4. Write the data value 2'b1 to the
data
register.
5. Write the
control and status
register write bit to 1'b1.
6. Read the DFE
control and status
register
busy
bit (bit 8) until it is clear.
7. When
busy
equals 1b’0, the Transceiver Reconfiguration Controller has updated
the l
ogical channel
specified in Step 2 with the data specified in Steps 3 and 4.
Example 16–2 shows a reconfiguration that turns on DFE one-time adaptation.
Example 16–1. Register-Based Write To Turn On Adaptive DFE for Logical Channel 0
#Setting logical channel 0
write_32 0x18 0x0
#Setting DFE offset to 0x0
write_32 0x1B 0x0
#Setting data register to 3
write_32 0x1C 0x3
#Writing the data to turn on adaptive DFE
write_32 0x1A 0x1
Example 16–2. Register-Based Write To Turn On DFE One-Time Adaptation Mode for Logical
Channel 0
#Setting logical channel 0
write_32 0x18 0x0
#Setting DFE offset to 0xB
write_32 0x1B 0xB
#Setting data register to 1
write_32 0x1C 0x1
#Writing the data to turn on DFE one-time adaptation
write_32 0x1A 0x1
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