Altera Transceiver PHY IP Core Manual de usuario Pagina 544

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Table 16-17: ATX Tuning Registers
ATX Addr Bits R/W Register Name Description
7’h30 [9:0] RW logical channel number The logical channel number. The
Transceiver Reconfiguration Controller
maps the logical address to the physical
address.
7’h32
[9] R
control and status
Error. When asserted, indicates an invalid
channel or address. This bit is asserted
after a write operation if the selected
logical channel number selects a logical
channel interface that is not connected to
an ATX PLL. It is also be asserted if the
tuning algorithm failed to converge on a
working setting after a manual calibration.
[8] R Busy. When asserted, indicates that a
reconfiguration operation is in progress.
[1] W Read. Writing a 1 to this bit triggers a read
operation.
[0] W Write. Writing a 1 to this bit triggers a
write operation.
7’h33 [3:0] RW atx_offset Specifies the 4-bit register address used for
indirect accesses on the reconfiguration
bus. Refer to Table 16-18 for offsets and
values.
7’h34 [15:0] RW data Reconfiguration data for the transceiver
PHY registers.
Table 16-18: ATX PLL Tuning Offsets and Values
Offset Bits R/W Register Name Description
0x0 [0] RW Control Writing a 1 to this bit triggers ATX PLL calibration. This
register self-clears. Unused bits of this register must be
set to 0. The tx_cal_busy signal is asserted at initial
runtime or if you reset the reconfiguration controller. It
is not asserted if you manually re-trigger the ATX PLL
calibration process. Writing a 1 to this bit will not
trigger ATX PLL calibration if the PLL is already locked.
0x1 [1] RW Writing a 1 to this bit triggers the ATX PLL calibration
even if the PLL is already locked.
Refer to Changing Transceiver Settings Using Register-Based Reconfiguration for the procedures you can
use to control ATX tuning.
UG-01080
2015.01.19
Transceiver Reconfiguration Controller ATX PLL Calibration Registers
16-27
Transceiver Reconfiguration Controller IP Core Overview
Altera Corporation
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