Lock Support - Altera cyclone V Technical Reference

7-22
Wrapping Bursts
Wrapping Bursts
The interconnect always converts
width maximum size of
into one or more
Fixed Bursts
The interconnect converts
ratio.
Bypass Merge
Bypass merge is accessible through the GPV registers and is only accessible to secure masters. If the
programmable bit
any packing of beats to match the optimal size for maximum throughput, up to the output data width size.
If an exclusive transaction is split into multiple transactions at the output of the downsizing function, the
exclusive flag is removed and the master never receives an
as for the upsizing function.
Related Information
fn_mod2
•
Upsizing Data Width Function
•
For more information about AXI terms such as
Protocol Specification v1.0, which you can download from the ARM website.
http://infocenter.arm.com
•
For more information about AXI terms such as
Interconnect (NIC-301) Technical Reference Manual, revision r2p3, which you can download from the
ARM Infocenter website.

Lock Support

Lock is not supported by the interconnect. For atomic accesses, masters can perform exclusive accesses
when sharing data located in the HPS SDRAM.
Related Information
SDRAM Controller Subsystem
For more information about exclusive access support, refer to the SDRAM Controller Subsystem chapter.
FIFO Buffers and Clock Crossing
The interconnect provides FIFO buffers in the following locations:
• On interfaces to all HPS master and slaves except onchip RAM and boot ROM
• Between subswitches
In addition to buffering, these FIFOs also provide clock domain crossing where masters and slaves operate
at a different clock frequency from the switch they connect to.
Altera Corporation
WRAP
, and treats the
WRAP16
bursts.
INCR
bursts to one or more
FIXED
in the
bypass_merge
on page 7-99
on page 7-20
on page 11-1
bursts to bursts of twice the length, up to the output data
WRAP
burst as two
WRAP
or
INCR1
register is enabled, the interconnect does not perform
fn_mod2
EXOKAY
,
DECERR WRAP
,
DECERR WRAP
bursts that can each be converted
INCR
bursts depending on the downsize
INCRn
response. Response priority is the same
, and , refer to the AMBA AXI
INCR
, and , refer to the AMBA Network
INCR
System Interconnect
cv_5v4
2016.10.28
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