Fpga control block interface – Altera Partial Reconfiguration IP Core User Manual
Page 15
Table 7: PR_CSR Control and Status Registers
Bit Offset
Description
0
Read and write control register for pr_start signal.
Refer to “Input/output Port List” section for more
details on pr_start signal.
pr_start = PR_CSR[0]
PR_CSR[0]
is de-asserted to value “0” by the IP core
automatically one clock cycle after it is asserted to
streamline the flow so you do not need to manually
assert and de-assert this register to control
pr_
start
signal.
1
Read and write control register for
double_pr
signal.
double_pr = PR_CSR[1]
2-4
Read only status register for
status[2:0]
signal.
PR_CSR[4:2] = status[2:0]
5-15 or 5-31
(1)
Reserved
Related Information
•
Avalon Memory Map Slave Interface Read and Write Transfer Timing
on page 17
•
Partial Reconfiguration IP Core Ports
on page 8
FPGA Control Block Interface
When you instantiate the PR IP core, you can choose to use it as either an internal host or external host.
If it is used as an internal host, the PR IP core auto instantiates the corresponding device
crcblock
and
prblock
WYSIWYG atom primitive. If PR is used as external host (placed in another FPGA or CPLD),
the PR IP core provides the
crcblock
and
prblock
interface ports so you can connect the host to the
dedicated PR pins and CRC_ERROR pin on the target FPGA being partially reconfigured.
Note: You may need to instantiate the PR IP core as an external host to share the
crcblock
and
prblock
interface even though the PR IP core is located inside the FPGA being partially reconfigured. For
example; your design uses another piece of IP, which instantiates its own
crcblock
WYSIWYG
atom primitive to unload the Error Message Register (EMR) whenever
CRC_ERROR
is detected. Your
design must share the
crcblock
interface signals between the PR IP core and secondary IP,
otherwise the Quartus II compilation will fail because more than one
crcblock
is not allowed.
You can also instantiate the PR IP core as the external host so be able to add
crcblock
and
problock
WYSIWYG atom primitive instances to SignalTap II for debugging purposes.
UG-PARTRECON
2015.05.04
FPGA Control Block Interface
15
Partial Reconfiguration IP Core
Altera Corporation