Altera UG-01080 Guía de usuario Pagina 435

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Chapter 17: Transceiver PHY Reset Controller IP Core 17–7
Interfaces
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
reset
Input
Asynchronous reset input to the Transceiver PHY Reset Controller.
When asserted, all configured reset outputs are asserted. Holding the
reset input signal asserted holds all other reset outputs asserted.
Output Signals
tx_digitalreset[<n>-1:0]
Output
Digital reset for TX. The width of this signal depends on the number of
TX channels. This signal is asserted when any of the following
conditions is true:
reset
is asserted.
pll_powerdown
is asserted
tx_cal_busy
is asserted
PLL has not reached the initial lock (
pll_locked
deasserted)
pll_locked
is deasserted and
tx_manual
is deasserted
When all of these conditions are false, the reset counter begins its
countdown for deassertion of
tx_digital_reset
.
tx_analogreset[<n>-1:0]
Output
Analog reset for TX channels. This signal follows
pll_powerdown
and
is deasserted a few clock cycles after the TX PLL comes out the reset
and locks to the input reference clock.
tx_ready[<n>-1:0]
Output
Status signal to indicate when the TX reset sequence is complete.This
signal is deasserted while the TX reset is active. It is asserted a few
clock cycles after the deassertion of
tx_digitalreset
. The width of
this signal depends on the number of TX channels.
rx_digitalreset[<n>-1:0]
Output
Digital reset for RX. The width of this signal depends on the number of
channels. This signal is asserted when any of the following conditions is
true:
reset
is asserted
rx_analogreset
is asserted
rx_cal_busy
is asserted
rx_is_lockedtodata
is deasserted and
rx_manual
is deasserted
When all of these conditions are false, the reset counter begins its
countdown for deassertion of
rx_digital_reset
.
rx_ready[<n>-1:0]
Output
Status signal to indicate when the RX reset sequence is complete.This
signal is deasserted while the RX reset is active. It is asserted a few
clock cycles after the deassertion of
rx_digitalreset
. The width of
this signal depends on the number of channels.
pll_powerdown[<p>-1:0]
Output
When asserted, this status signal indicates that the selected TX PLL is
reset.
Table 17–4. Top-Level Signals (Part 2 of 2)
Signal Name Direction Description
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