Parallel Flash Loader Megafunction User Guide (PDF) - Altera
Parallel Flash Loader Megafunction User Guide (PDF) - Altera
Parallel Flash Loader Megafunction User Guide (PDF) - Altera
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Parameters Page 41<br />
Table 13. PFL <strong>Megafunction</strong> Parameters (Part 4 of 5)<br />
<strong>Megafunction</strong> Options Value Description<br />
Configuration failure<br />
response options<br />
Byte address to retry from<br />
on configuration failure<br />
Include input to force<br />
reconfiguration<br />
Watchdog timer<br />
Time period before the<br />
watchdog timer times out<br />
Ratio between input clock<br />
and DCLK output clock<br />
Halt, Retry same page, or<br />
Retry from fixed address<br />
—<br />
On or Off<br />
On or Off<br />
—<br />
1, 2, 4, or 8<br />
Configuration behavior after configuration failure.<br />
If you select Halt, the FPGA configuration stops<br />
completely after failure.<br />
If you select Retry same page, after failure, the PFL<br />
megafunction reconfigures the FPGA with data from the<br />
same page of the failure.<br />
If you select Retry from fixed address, the PFL<br />
megafunction reconfigures the FPGA with data from a<br />
fixed address in the next option field after failure.<br />
If you select Retry from fixed address for configuration<br />
failure option, this option specifies the flash address for<br />
the PFL megafunction to read from the reconfiguration<br />
for a configuration failure.<br />
Includes an optional reconfiguration input pin<br />
(pfl_nreconfigure) to enable a reconfiguration of<br />
the FPGA.<br />
Enables a watchdog timer for remote system upgrade<br />
support. Turning on this option enables the<br />
pfl_reset_watchdog input pin and<br />
pfl_watchdog_error output pin, and specifies the<br />
time period before the watchdog timer times out. This<br />
watchdog timer is a time counter which runs at the<br />
pfl_clk frequency.<br />
Specifies the time out period of the watchdog timer. The<br />
default time out period is 100 ms.<br />
Specifies the ratio between the input clock and DCLK.<br />
■<br />
■<br />
■<br />
■<br />
Ratio 8 means every eight external clocks to<br />
pfl_clk generate one fpga_dclk.<br />
Ratio 4 means every four external clocks to<br />
pfl_clk generate one fpga_dclk.<br />
Ratio 2 means every two external clocks to<br />
pfl_clk generate one fpga_dclk.<br />
Ratio 1 means every one external clock to pfl_clk<br />
generate one fpga_dclk.<br />
<strong>Parallel</strong> <strong>Flash</strong> <strong>Loader</strong> <strong>Megafunction</strong> <strong>User</strong> <strong>Guide</strong><br />
May 2013<br />
<strong>Altera</strong> Corporation