
Word
Addr
Bits R/W Register Name Description
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.
Reset Controls –Manual Mode
Table 9-23: Reset Controls –Manual Mode
Word
Addr
Bits R/W Register Name Description
0x044
[31:0]
[31:4,0] are
reserved
RW reset_fine_control You can use the reset_fine_control
register to create your own reset sequence.
If you disable Enable embedded reset
controller on the General Options tab of
the MegaWizard Plug-In Manager, you
can design your own reset sequence using
the tx_analogreset, rx_analogreset,
tx_digitalreset, rx_digitalreset,
and pll_powerdown which are top-level
ports of the Custom Transceiver PHY. By
default, the CDR circuitry is in automatic
lock mode whether you use the embedded
reset controller or design your own reset
logic. You can switch the CDR to manual
mode by writing the pma_rx_setlockto-
data or pma_rx_set_locktoref registers
to 1.
It is safe to write 0s to reserved bits.
[3] RW reset_rx_digital Writing a 1 causes the internal 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.
9-30
Reset Controls –Manual Mode
UG-01080
2015.01.19
Altera Corporation
Custom PHY IP Core
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