Intel Stratix 10 User Manual

8.6. Configuring the Attenuation Value (VOD)
This usage model covers configuring attenuation value (VOD) of 0x1 for the PMA
driver.
Setting the attenuation parameter (VOD) which is configurable in the TX Equalizer
block
1. Write 0x84[7:0] = 0x01.
2. Write 0x85[7:0] = 0x40.
3. Write 0x86[7:0] = 0x15.
4. Write 0x87[7:0] = 0x00.
5. Write 0x90[0] = 1’b1.
6. Read 0x8A[7]. It should be 1.
7. Read 0x8B [0] until it changes to 0.
8. Write 0x8A[7] to 1 to clear the 0x8A[7] flag.
9. Read 0x8A[7]. It should be 1.
8.7. Configuring the Post Emphasis Value
This usage model covers configuring the Post Emphasis value in the TX Equalizer for
decimal values 2 and -2. The negative decimal value is represented as an 8-bit 2's
complement.
Example 1: Setting the post_tap emphasis of the TX Equalizer with PMA attribute
values of 2 (decimal) and 0x02 (hexadecimal) or -2 (decimal) and 0xFE (hexadecimal)
and PMA attribute code of 0x15
1. Write 0x84[7:0] = 0x02 for 2 (decimal), or write 0x84[7:0] = 0xFE for -2
(decimal).
2. Write 0x85[7:0] = 0x80.
3. Write 0x86[7:0] = 0x15.
4. Write 0x87[7:0] = 0x00.
5. Write 0x90[0] = 1’b1.
6. Read 0x8A[7]. It should be 1.
7. Read 0x8B [0] until it changes to 0.
8. Write 0x8A[7] to 1 to clear the 0x8A[7] flag.
9. Read 0x8A[7]. It should be 1.
Example 2: Setting the post_tap emphasis of the TX Equalizer with PMA attribute
values of -18 (decimal) and 0xEE (2’s complement) and PMA attribute code of 0x15
10. Write 0x84[7:0] = 0xEE.
11. Write 0x85[7:0] = 0x80.
12. Write 0x86[7:0] = 0x15.
13. Write 0x87[7:0] = 0x00.
14. Write 0x90[0] = 1’b1.
15. Read 0x8A[7]. It should be 1
8. Dynamic Reconfiguration Examples
UG-20056 | 2019.02.04
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10 E-Tile Transceiver PHY User Guide
153

Intel Stratix 10 Specifications

General

Brand	Intel
Model	Stratix 10
Category	Control Unit
Language	English