
Chapter 4: Backplane Ethernet 10GBASE-KR PHY IP Core 4–31
10GBASE-KR PHY PMA and PCS Registers
November 2012 Altera CorporationAltera Transceiver PHY IP Core
User Guide
10GBASE-KR PHY PMA and PCS Registers
Table 4–19 describes the PMA registers.
0xD6
13:8 RW
LT VODMin ovrd
Override value for the VODMINRULE parameter. When set
to 1, this value substitutes for the VMINRULE to allow
channel-by-channel override of the device settings. This
override only effects the local device TX output for this
channel. The value to be substituted must be less than the
INITMAINVAL parameter and greater than the VMINRULE
parameter for proper operation.
14 RW
LT VODMin ovrd Enable
When set to 1, enables the override value for the
VODMINRULE parameter stored in the
LT VODMin ovrd
register field.
20:16 RW
LT VPOST ovrd
Override value for the VPOSTRULE parameter. When set to
1, this value substitutes for the VPOSTRULE to allow
channel-by-channel override of the device settings. This
override only effects the local device TX output for this
channel. The value to be substituted must be greater than
the INITPOSTVAL parameter for proper operation.
21 RW
LT VPOST ovrd Enable
When set to 1, enables the override value for the
VPOSTRULE parameter stored in the
LT VPOST ovrd
register field.
27:24 RW
LT VPre ovrd
Override value for the VPRERULE parameter. When set to
1, this value substitutes for the VPOSTRULE to allow
channel-by-channel override of the device settings. This
override only effects the local device TX output for this
channel. The value greater than the INITPREVAL
parameter for proper operation.
28 RW
LT VPre ovrd Enable
When set to 1, enables the override value for the
VPRERULE parameter stored in the
LT VPre ovrd
register field.
Table 4–18. 10GBASE-KR Register Definitions (Part 12 of 12)
Word
Address
Bit R/W Name Description
Table 4–19. PMA Registers (Part 1 of 2)
address
Bit Access
Name Description
0x22
[<p>-
1:0]
RO
pma_tx_pll_is_locked
Indicates that the TX PLL is locked to the input reference
clock. <p> is the number of PLLs.
0x41
[<n>-
1:0]
RW
reset_ch_bitmask
Bit mask for digital resets. The default value is all 1s. <n>
is the number of channels.
0x61 [31:0] RW
phy_serial_loopback
Writing a 1 puts the channel in serial loopback mode.
0x64 [31:0] RW
pma_rx_set_locktodata
When set, programs the RX CDR PLL to lock to the
incoming data.
0x65 [31:0] RW
pma_rx_set_locktoref
When set, programs the RX clock data recovery (CDR)
PLL to lock to the reference clock.
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