Zynq UltraScale+ Devices Register Reference > Module Summary > PCIE_ATTRIB Module > ATTR_91 (PCIE_ATTRIB) Register

ATTR_91 (PCIE_ATTRIB) Register

ATTR_91 (PCIE_ATTRIB) Register Description

Register NameATTR_91
Relative Address0x000000016C
Absolute Address 0x00FD48016C (PCIE_ATTRIB)
Width32
TyperwNormal read/write
Reset Value0x00000000
DescriptionATTR_91

This register should only be written to during reset of the PCIe block

ATTR_91 (PCIE_ATTRIB) Register Bit-Field Summary

Field NameBitsTypeReset ValueDescription
attr_ll_ack_timeout_en15rwNormal read/write0x0Enables the Ack/Nak Latency Timer to use the user-defined LL_ACK_TIMEOUT value (or combined with the built-in value, depending on LL_ACK_TIMEOUT_FUNC). If FALSE, the built-in value is used.
attr_ll_ack_timeout14:0rwNormal read/write0x0Sets a user-defined timeout for the Ack/Nak Latency Timer to force any pending ACK or NAK DLLPs to be transmitted; refer to LL_ACK_TIMEOUT_EN and LL_ACK_TIMEOUT_FUNC to see how this value is used. The unit for this attribute is in symbol times, which is 4ns at GEN1 speeds and 2ns at GEN2.