Settings and Configuration Files

Timing Requirements Section (Settings and Configuration Files)

The Timing Requirement Section specifies project-wide or individual timing requirements for a project. The Timing Requirements section is located in the Entity Settings File (.esf).

The Timing Requirements section keyword is TIMING_REQUIREMENTS.

The Timing Requirements section contains statements that follow these Usage Code definitions.

The following table shows the Timing Requirements section keywords (which are underscore separated), descriptions, legal settings, and usage codes:

Keyword Settings Code
CLOCK_SETTINGS <hierarchy path name> B
CUT On | Off B,C
ENABLE_MULTICYCLE <integer> B, C
ENABLE_MULTICYCLE_HOLD <integer> B, C
ENABLE_SOURCE_MULTICYCLE <integer> B, C
ENABLE_SOURCE_MULTICYCLE_HOLD <integer> B, C
EXTERNAL_INPUT_DELAY <time> B
EXTERNAL_OUTPUT_DELAY <time> B
INVERTED_CLOCK On | Off B
MINIMUM_DELAY_REQUIREMENT <time> B,C
MULTICYCLE <integer> B,C
MULTICYCLE_HOLD <integer> B,C
NOT_A_CLOCK On | Off B
SOURCE_MULTICYCLE <integer> B,C
SOURCE_MULTICYCLE_HOLD <integer> B,C
TCO_REQUIREMENT <time> B,C
TH_REQUIREMENT <time> B,C
TPD_REQUIREMENT <time> B,C
TSU_REQUIREMENT <time> B,C


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