Datasheet

REV. B
ADMC401
–6–
Parameter Min Max Unit
Interrupts and Flags
Timing Requirements:
t
IFS
IRQx or FI Setup before CLKOUT Low
1, 2, 3
0.25t
CK
+ 15 ns
t
IFH
IRQx or FI Hold after CLKOUT High
1, 2, 3
0.25t
CK
ns
Switching Characteristics:
t
FOH
Flag Output Hold after CLKOUT Low
4
0.5t
CK
– 7 ns
t
FOD
Flag Output Delay from CLKOUT Low
4
0.5t
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, Third Edition for further
information on interrupt servicing.)
2
Edge-sensitive interrupts require pulsewidths greater than 10 ns; level-sensitive interrupts must be held low until serviced.
3
IRQx = IRQ0 and IRQ1.
4
Flag Output = FL1 and FO.
CLKOUT
FLAG
OUTPUTS
IRQx
FI
t
FOH
t
IFH
t
IFS
t
FOD
Figure 2. Interrupts and Flags