
SPI Slave/JTAG to Avalon Master Bridge Cores
18
2014.24.07
UG-01085
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Core Overview
The SPI Slave to Avalon
®
Master Bridge and the JTAG to Avalon Master Bridge cores provide a
connection between host systems and Qsys systems via the respective physical interfaces. Host systems
can initiate Avalon Memory-Mapped (Avalon-MM) transactions by sending encoded streams of bytes via
the cores’ physical interfaces. The cores support reads and writes, but not burst transactions.
Functional Description
Figure 18-1: System with a SPI Slave to Avalon Master Bridge Core
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Rest of the
System
SPI
Master
(Example:
Power PC
Processor)
Altera FPGA
SPI to Transaction Bridge
src
k
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s
A
v
alon-ST
Bytes to
Packets
Con
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erter
src
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Avalon-ST
Packets to
Transactions
Converter
Avalon-MM Mast
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src
Avalon-ST
Source
sink
Avalon-ST
Sink
src
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A
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alon-ST
P
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ckets to
Bytes
Con
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erter
Avalon-ST
SPI Core
SPI
src
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SPI
ClockClock
System
Clock
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