Design Center


- 10


+ IO_LS MNTYMXDLY = {MNTYMXDLY} IO_LEVEL = {IO_LEVEL}

+

+ BOOLEAN:

+ CLOCK = { CHANGED_LH (CLK, 0) }

+ CNTENT = { CHANGED (ENT, 0) }

+

+ PINDLY:

+ QA_O QB_O QC_O QD_O = {

+ CASE (

+ CLOCK & TRN_LH, DELAY( -1, 13NS, 24NS),

+ CLOCK & TRN_HL, DELAY( -1, 18NS, 27NS),

+ CHANGED_HL ( CLRBAR, 0), DELAY( -1, 20NS, 28NS),

+ DELAY( -1, 20NS, 28NS) ;

+ )

+ }

+ RCO_O = {

+ CASE (

+ CNTENT, DELAY( -1, 9NS, 14NS),

+ CLOCK & TRN_LH, DELAY( -1, 20NS, 35NS),

+ CLOCK & TRN_HL, DELAY( -1, 18NS, 35NS),

+ DELAY( -1, 20NS, 35NS) ;

+ )

+ }

 

6.5.3.

 

CONSTRAINT . /, , , . CONSTRAINT .

 

Uxxx CONSTRAINT ( < > )

+ <+ > < >

+ < 1> . . . < n>

+ < />

+ [ IO_LEVEL=< >]

+ [ BOOLEAN: < > * ] ...

+ [ SETUP_HOLD: < />] ...

+ [ WIDTH: < > ] ...

+ [ FREQ: < > ] ...

+ [ GENERAL: < > ] ...

 

BOOLEAN  < >

 

< > = { < > }




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