
8–14 Chapter 8: PHY IP Core for PCI Express (PIPE)
Register Interface and Register Descriptions
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
Table 8–11 describes the registers that you can access over the Avalon-MM PHY
management interface using word addresses and a 32-bit embedded processor. A
single address space provides access to all registers.
1 Writing to reserved or undefined register addresses may have undefined side effects.
phy_mgmt_read
Input Read signal.
phy_mgmt_waitrequest
Output
When asserted, indicates that the Avalon-MM slave interface is unable to
respond to a read or write request. When asserted, control signals to the
Avalon-MM slave interface must remain constant.
Table 8–10. Avalon-MM PHY Management Interface (Part 2 of 2)
Signal Name Direction Description
Table 8–11. PCI Express PHY (PIPE) IP Core Registers (Part 1 of 4)
Word
Addr
Bits R/W Register Name Description
PMA Common Control and Status Registers
0x022 [31:0] R
pma_tx_pll_is_locked
Bit[P] indicates that the TX CMU PLL (P) is locked to the
input reference clock. There is typically one
pma_tx_pll_is_locked
bit per system.
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.
Refer to Timing Constraints for Reset Signals when Using
Bonded PCS Channels for a SDC constraint you must
include in your design.
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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