Transaction layer protocol (tlp) details, Supported message types, Intx messages – Altera Stratix V Avalon-ST User Manual
Page 184
Transaction Layer Protocol (TLP) Details
11
2014.08.18
UG-01097_avst
Supported Message Types
INTX Messages
The following table describes the message INTX messages. For Endpoints, only INTA messages are
generated.
Table 11-1: INTX Messages
Message
Root
Port
Endpoint
Generated by
Comments
App
Layer
Core
Core
(with
App
Layer
input)
INTX Mechanism
For Endpoints, only INTA messages are
generated.
Assert_
INTA
Receive Transmit No
Yes
No
For Root Port, legacy interrupts are
translated into message interrupt TLPs
which triggers the
int_status[3:0]
signals
to the Application Layer.
•
int_status[0]
: Interrupt signal A
•
int_status[1]
: Interrupt signal B
•
int_status[2]
: Interrupt signal C
•
int_status[3]
: Interrupt signal D
Assert_
INTB
Receive Transmit No
No
No
Assert_
INTC
Receive Transmit No
No
No
Assert_
INTD
Receive Transmit No
No
No
Deassert
_INTA
Receive Transmit No
Yes
No
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