Teledyne LeCroy Summit Z3-16 PCI Express Multi-lane Exerciser User Manual - Manual (Page 56)

Teledyne LeCroy Generation Options Dialogs Overview
56 Summit Z3‐16 PCI Express Multi‐Lane Exerciser User Manual
TABLE 4.4: Flow Control Generation Option Parameters
Note: Currently the Summit Z3‐16 Exerciser does not support processing for nullified TLPs in the
receiver path. This test scenario should be avoided.
FCRx Parameter Values Default Comment
Tx Flow Control
Do not send TLP
packet if credit
amount is
insufficient Yes
No Yes When not set, the TLPs are being sent
without the regard of how many
credits are available.
This option prevents TLP
transmission if insufficient credits are
available.
Rx Flow Control
Periodically
schedule UpdateFC
DLLP In ns 
(rounded to nearest
8)
Off 4200 When enabled, allows automatic
updating of these DLLPs.
This option enables a periodic timer
that controls sending of UpdateFC
DLLPs. You should leave timer and
credit values to defaults for correct
behavior.
Initial Credits to Advertise
PH 0 to 255 1 Posted Request Headers
NPH 0 to 255 1 Non‐Posted Request Headers
CPLH 0 to 255 1 Completion Headers
PD 0 to 4095 1024 Posted Request Data Payload
NPD 0 to 4095 1 Non‐Posted Request Data Payload
CPLD 0 to 4095 1024 Completion Data Payload