Altera Stratix V Avalon-ST User Manual
Page 100
Signal Name
Direction
Description
txfc_max
Output
When asserted, indicates that Transaction Layer has enough
credits to send maximum payload TLPs of all types. Used for
entry into low power state.
txbuf_emp
Output
When asserted, indicates there are no Application Layer TLPs
pending for transmission in the Transaction Layer.
rpbuf_emp
Output
When asserted, indicates the replay buffer contains no TLPs.
dll_req
Output
When asserted, indicates that the Data Link Layer TX path has a
pending request. Used to enable L0s entry or other low-power
state. This is a level sensitive signal.
link_auto_bdw_status
Output
When asserted, indicates that the LTSSM detected an
autonomous bandwidth change which is reported in the
Link
Status Register
.
link_bdw_mng_status
Output
When asserted, indicates that the LTSSM detected a
non-autonomous bandwidth change. Reported in the
Link
Status Register
.
rst_tx_margin_field
Output
When asserted, indicates that the Application Layer should reset
the
Transmit Margin
field of the
Link Control 2 Register
in
the Application Layer’s soft Configuration Space.
rst_enter_comp_bit
Output
When asserted, indicates that the Application Layer should reset
the
Enter Compliance
bit in the
Link Control 2 Register
in
the Application Layer’s soft Configuration Space.
rx_st_ecrcerr[3:0]
Output
Indicates which quad word on
rx_st_data
contains a TLP with
an ECRC error. Only asserted during the cycle that in which the
start of packet is asserted. Only valid only if internal ECRC error
checking is enabled.
err_uncorr_internal
Output
When asserted, indicates an uncorrectable internal error was
detected. This is a real-time active high pulse.
err_corr_internal
Output
When asserted, indicates a corrected internal error (ECC)
detected. This is a real-time active high pulse.
err_tlrcvovf
Output
When asserted, indicates a receiver overflow error. This is a
real-time active high pulse.
txfc_err
Output
When asserted, indicates a TX Flow Control Protocol error. This
is a real-time active high pulse.
5-48
Configuration Space Bypass Mode Interface Signals
UG-01097_avst
2014.12.15
Altera Corporation
Interfaces and Signal Descriptions