
Chapter 10: Low Latency PHY IP Core 10–13
Register Interface and Register Descriptions
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Table 10–12 describes the signals in the PHY Management interface.
f For more information about the Avalon-MM and Avalon-ST protocols, including
timing diagrams, refer to the Avalon Interface Specifications.
Table 10–13 describes the registers that you can access over the PHY Management
Interface using word addresses and a 32-bit embedded processor.
1 Writing to reserved or undefined register addresses may have undefined side effects.
Table 10–12. Avalon-MM PHY Management Interface
Signal Name Direction Description
phy_mgmt_clk
Input
Avalon-MM clock input. There is no frequency restriction for the
phy_mgmt_clk
; however, if you plan to use the same clock for the
PHY management interface and transceiver reconfiguration, you
must restrict the frequency range of
phy_mgmt_clk
to
100–150 MHz to meet the specification for the transceiver
reconfiguration clock.
phy_mgmt_clk_reset
Input
Global reset signal. This signal is active high and level sensitive.
This is an asynchronous signal.
phy_mgmtaddress[8:0]
Input 9-bit Avalon-MM address.
phy_mgmt_writedata[31:0]
Input Input data.
phy_mgmt_readdata[31:0]
Output Output data.
phy_mgmt_write
Input Write signal.
phy_mgmt_read
Input Read signal.
Table 10–13. Low Latency PHY IP Core Registers (Part 1 of 2)
Word
Addr
Bits R/W Register Name Description
Reset Control Registers–Automatic Reset Controller
0x041 [31:0] RW
reset_ch_bitmask
Reset controller channel bitmask for digital resets. The
default value is all 1s. Channel <
n
> can be reset when
bit<
n
> = 1.
0x042 [1:0]
W
reset_control
(write)
Writing a 1 to bit 0 initiates a TX digital reset using the
reset controller module. The reset affects channels
enabled in the reset_ch_bitmask. Writing a 1 to
bit 1 initiates a RX digital reset of channels enabled in
the reset_ch_bitmask.
R
reset_status
(read)
Reading bit 0 returns the status of the reset controller
TX ready bit. Reading bit 1 returns the status of the
reset controller RX ready bit.
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