Additional Per Port HP I/O PL Signals

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

Document ID
UG1085
Release Date
2022-09-15
Revision
2.3 English

The additional signals provided to the PL (in addition to the standard AXI4 signals) are listed in Table: Additional Per Port HP I/O Signals. The QoS priority and FIFO occupancy management functions (read and write data and command buffer counts) are discussed in the following sections.

Table 35-3:      Additional Per Port HP I/O Signals

Type

PS-PL Signal Name

I/O

Description

FIFO Occupancy

*_RCOUNT[7:0]

O

Fill level of read data channel FIFO.

*_WCOUNT[7:0]

O

Fill level of write data channel FIFO.

*_RACOUNT[3:0]

O

Fill level of read address channel FIFO.

*_WACOUNT[3:0]

O

Fill level of write address channel FIFO.

Quality of Service

*_AWQOS[3:0]

I

Write address channel QOS input. Qualified by corresponding *_AWVALID.

*_ARQOS[3:0]

I

Read address channel QOS input. Qualified by corresponding *_ARVALID.