Reset scheme, Reset scheme -24 – Altera JESD204B IP User Manual
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on page 4-22
Reset Scheme
All resets in the JESD204B IP core are synchronous reset signals and should be asserted and deasserted
synchronously.
Note: Ensure that the resets are synchronized to the respective clocks for reset assertion and deassertion.
Table 4-4: JESD204B IP Core Resets
Reset Signal
Associated Clock
Description
txlink_rst_n
rxlink_rst_n
TX/RX Link Clock
Active low reset controlled by the clock and
reset unit.
Altera recommends that you:
• Assert the
txlink_rst_n
/
rxlink_rst_n
and
txframe_rst_n
/
rxframe_rst_n
signals when the transceiver is in reset.
• Deassert the
txlink_rst_n
and
txframe_
rst_n
signals after the Altera PLL IP core is
locked and the
tx_ready[]
signal from the
Transceiver Reset Controller is asserted.
• Deassert the
rxlink_rst_n
and
rxframe_
rst_n
signals after the Transceiver CDR
rx_islockedtodata[]
signal and
rx_
ready[]
signal from the Transceiver Reset
Controller are asserted.
The
txlink_rst_n
/
rxlink_rst_n
and
txframe_rst_n
/
rxframe_rst_n
signals can
be deasserted at the same time. These resets
can only be deasserted after you configure the
CSR registers.
txframe_rst_n
rxframe_rst_n
TX/RX Frame Clock
Active low reset controlled by the clock and
reset unit. If the TX/RX link clock and the TX/
RX frame clock has the same frequency, both
can share the same reset.
4-24
Reset Scheme
UG-01142
2015.05.04
Altera Corporation
JESD204B IP Core Functional Description