Altera Mentor Verification IP Altera Edition AMBA AXI3/4TM - Manual (Page 19)

Mentor VIP AE AXI3/4 User Guide, V10.2b 1
September 2013
Preface
About This User Guide
This Mentor ® Verification IP (VIP) Altera ® Edition (AE) User Guide describes the AXI3/AXI4
application interface (API) of the Mentor VIP AE and how it conforms to the AMBA ® AXI and
ACE Protocol Specification, AXI3 TM , AXI4T TM , and AXI-Lite TM , ACE, and ACE-Lite TM
(ARM IHI 0022D).
Note
This release supports only the AMBA AXI3, AXI4, AXI4-Lite, and AXI4-Stream TM
protocols. The AMBA ACE protocol is not supported in this release.
AMBA AXI Protocol Specification
The Mentor VIP AE conforms to the AMBA ® AXI and ACE Protocol Specification, AXI3 TM ,
AXI4T TM , and AXI-Lite TM , ACE and ACE-Lite TM (ARM IHI 0022D). For restrictions to this
protocol, refer to the section Protocol Restrictions .
This user guide refers to the AMBA ® AXI and ACE Protocol Specification, AXI3 TM , AXI4 TM ,
and AXI-Lite TM , ACE and ACE-Lite TM as the AXI protocol specification.
Protocol Restrictions
The Mentor VIP AE supports all but the following features of this AXI Specification, which
gives you a simplified API to create desired protocol stimulus.
BFM Dependencies Between Handshake Signals
Starting a write data phase before its write address phase in a transaction is not supported.
However, starting a write data phase simultaneously with its write address phase is supported.
The above statement disallowing a write data phase to start before its write address phase in a
transaction modifies the AXI3 protocol specification write transaction handshake dependencies
diagram, Figure A3-6 in section A3.3.1, by effectively adding double-headed arrows between
AWVALID to WVALID and AWREADY to WVALID, with the provision that they can be
simultaneous.