A.8.5 Read data channel signals

Read data channel signals carry the read data and the read response information from the slave to the master, and include the data bus and a read response signal.

The following table shows the read data channel signals.

Table A-12 Read data channel signals

Signal
Direction
Description
RIDSx[n:0]
Output
Read data ID.
The width of this signal is IMPLEMENTATION DEFINED.
RDATASx[127:0]
Output
Read data.
RRESPSx[3:0]
Output
Read data response for ACE interfaces S3 and S4.
RRESPSx[1:0]
Output
Read data response for ACE-Lite interfaces S0, S1, and S2.
RLASTSx
Output
Read last. This signal indicates the last transfer in a read burst.
RUSERSx[n:0]
Output
The specified extension to the R payload.
The width of this signal is IMPLEMENTATION DEFINED.
RCHECKSUMSx[n:0]
Output
An optional extension to the R payload that can transmit checksum or parity information for the data.
The width of this signal is IMPLEMENTATION DEFINED.
RVALIDSx
Output
Read data is valid.
RREADYSx
Input
Read data is ready.
RTRACESx
Output
Read trace output. This signal replicates ARTRACESx for the corresponding request.
Non-ConfidentialPDF file icon PDF versionARM 100282_0100_00_en
Copyright © 2015, 2016 ARM. All rights reserved.