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ADSP-2186
TIMING PARAMETERS
Parameter
Interrupts and Flag
Timing Requirements:
IRQx, FI, or PFx Setup before CLKOUT Low
t
IFS
t
IRQx, FI, or PFx Hold after CLKOUT High
IFH
Switching Characteristics:
t
Flag Output Hold after CLKOUT Low
FOH
t
Flag Output Delay from CLKOUT Low
FOD
NOTES
1
If IRQx and FI inputs meet t
and t
IFS
the following cycle. (Refer to "Interrupt Controller Operation" in the Program Control chapter of the ADSP-2100 Family User's Manual for further information on
interrupt servicing.)
2
Edge-sensitive interrupts require pulse widths greater than 10 ns; level-sensitive interrupts must be held low until serviced.
3
IRQx = IRQ0, IRQ1, IRQ2, IRQL0, IRQL1, IRQE.
4
PFx = PF0, PF1, PF2, PF3, PF4, PF5, PF6, PF7.
5
Flag outputs = PFx, FL0, FL1, FL2, Flag_out4.
5
5
setup/hold requirements, they will be recognized during the current clock cycle; otherwise the signals will be recognized on
IFH
CLKOUT
FLAG
OUTPUTS
IRQx
FI
PFx
Figure 15. Interrupts and Flags
Min
1, 2, 3, 4
0.25 t
CK
1, 2, 3, 4
0.25 t
0.25 t
t
FOD
t
FOH
t
IFH
t
IFS
–18–
Max
+ 15
CK
– 7
CK
0.5 t
+ 5
CK
Unit
ns
ns
ns
ns
REV. 0
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