
Chapter 3: 10GBASE-R PHY IP Core 3–19
Register Interface and Register Descriptions
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
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 1 s. Channel <n> can be reset when
bit<n> = 1. Channel <n> cannot be reset when bit<n>=0.
0x042 [1:0]
WO
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. Both bits 0 and 1 self-clear.
RO
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.
0x044
[31:0] RW
reset_fine_control
You can use the
reset_fine_control
register to create
your own reset sequence. The reset control module,
illustrated in Transceiver PHY Top-Level Modules, performs
a standard reset sequence at power on and whenever the
phy_
mgmt_clk_reset
is asserted. Bits [31:4,0] are
reserved.
[31:4,0] RW
Reserved
It is safe to write 0s to reserved bits.
[1] RW
reset_tx_digital
Writing a 1 causes the internal TX digital reset signal to be
asserted, resetting all channels enabled in
reset_ch_bitmask. You must write a 0 to clear the
reset condition.
[2] RW
reset_rx_analog
Writing a 1 causes the internal RX digital reset signal to be
asserted, resetting the RX analog logic of all channels
enabled in reset_ch_bitmask. You must write a 0 to
clear the reset condition.
[3] RW
reset_rx_digital
Writing a 1 causes the RX digital reset signal to be
asserted, resetting the RX digital channels enabled in
reset_ch_bitmask. You must write a 0 to clear the
reset condition.
PMA Channel Control and Status
0x061 [31:0] RW
phy
_
serial
_
loopback
Writing a 1 to channel <n> puts channel <n> in serial
loopback mode. For information about pre- or post-CDR
serial loopback modes, refer to Loopback Modes.
0x064 [31:0] RW
pma_rx_set_locktodata
When set, programs the RX CDR PLL to lock to the
incoming data. Bit <n> corresponds to channel <n>.
0x065 [31:0] RW
pma_rx_set_locktoref
When set, programs the RX CDR PLL to lock to the
reference clock. Bit <n> corresponds to channel <n>.
0x066 [31:0] RO
pma_rx_is_lockedtodata
When asserted, indicates that the RX CDR PLL is locked to
the RX data, and that the RX CDR has changed from LTR to
LTD mode. Bit <n> corresponds to channel <n>.
0x067 [31:0] RO
pma_rx_is_lockedtoref
When asserted, indicates that the RX CDR PLL is locked to
the reference clock. Bit <n> corresponds to channel <n>.
Table 3–15. 10GBASE-R Register Descriptions (Part 2 of 3)
Word
Addr
Bit R/W Name Description
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