ID:14148 PLL "<name>" cannot be in <mode> because SCAN_CHAIN parameter is set to SHORT
CAUSE: The specified PLL is external feedback mode (that is, the OPERATION_MODE
parameter is set to EXTERNAL_FEEDBACK
; however, the specified mode cannot be implemented because the SCAN_CHAIN
parameter is set to SHORT
. External feedback mode is not supported for PLLs with short scan chains, because a PLL in external feedback mode requires an fbin
port and e
n (e0
–e3
) counters, but a PLL with a short scan chain must be placed in an enhanced PLL location that does not have an fbin
port and e
n counters. This problem usually occurs when you instantiate a megafunction directly in a text file rather than using the
MegaWizard Plug-In Manager
.
ACTION: Locate the source of the message to determine which megafunction parameter is causing the error and specify a legal mode for the PLL, set the SCAN_CHAIN
parameter to LONG
, or remove the SCAN_CHAIN
parameter. To avoid receiving this message in the future, Intel recommends using the MegaWizard Plug-In Manager command to specify legal parameter values for megafunctions.