Analog Devices ADSP-2186 - Manual (Page 18)

ADSP-2186
REV. 0 –18–
TIMING PARAMETERS
Parameter Min Max Unit
Interrupts and Flag
Timing Requirements:
t
IFS
IRQx, FI, or PFx Setup before CLKOUT Low 1, 2, 3, 4 0.25 t
CK
+ 15 ns
t
IFH
IRQx, FI, or PFx Hold after CLKOUT High 1, 2, 3, 4 0.25 t
CK
ns
Switching Characteristics:
t
FOH
Flag Output Hold after CLKOUT Low 5 0.25 t
CK
– 7 ns
t
FOD
Flag Output Delay from CLKOUT Low 5 0.5 t
CK
+ 5 ns
NOTES
1 If IRQx and FI inputs meet t
IFS
and t
IFH
setup/hold requirements, they will be recognized during the current clock cycle; otherwise the signals will be recognized on
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.
t
FOD
t
FOH
t
IFH
t
IFS
CLKOUT
FLAG
OUTPUTS
IRQ x
FI
PFx
Figure 15. Interrupts and Flags