Intel Stratix 10 User Manual

8. Dynamic Reconfiguration Examples
8.1. Reconfiguring the Duplex PMA Using the Reset Controller in
Automatic Mode
Dynamic reconfiguration is the process of modifying transceiver channels to meet
changing requirements during device operation. You can customize channels by
initiating reconfiguration during device operation or following power-up.
Common PMA parameters that are reconfigured are the reference clock source,
datarate and PMA serialization/deserialization factor. Refer to PMA Attribute Codes for
how to change the attribute codes. The following example shows how to reconfigure a
duplex PMA channel in NRZ mode in order to:
•
Reconfigure the PMA reference clock from refclk0 to refclk1 as listed in the
Native PHY IP
• Change the PMA baud rate
• Change the deserialization factor
Figure 87. Sending PMA Attribute Through AVMM Registers
0x87 0x86 0x85 0x84
0x90
7 0 0 07 7
0x8B 0x8A
Request issue
to PMA:
enable or
disable
Status of
request
made to
PMA[0]
Status of
request
made to
PMA[7]
7 0 0 07 7
07
PMA code
address
PMA code
value
Reconfiguration Flow
1.
Assert tx_reset/rx_reset.
2.
Wait for the tx_ready/rx_ready to deassert.
3. Disable the PMA by using PMA attribute code 0x0001.
a. Write 0x84[7:0] = 0x00.
b. Write 0x85[7:0] = 0x00.
c. Write 0x86[7:0] = 0x01.
d. Write 0x87[7:0] = 0x00.
e. Write 0x90[0] = 1’b1.
f. Read 0x8A[7]. It should be 1.
g. Read 0x8B[0] until it changes to 0.
UG-20056 | 2019.02.04
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Intel Stratix 10 Specifications

General

Brand	Intel
Model	Stratix 10
Category	Control Unit
Language	English