adsp-2186n Analog Devices, Inc., adsp-2186n Datasheet - Page 29

• Manufacturer Part Number: adsp-2186n
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

Interrupts and Flags
Table 16. Interrupts and Flags
1
2
3
4
5
Parameter
Timing Requirements:
t
t
Switching Characteristics:
t
t
If IRQx and FI inputs meet t
Edge-sensitive interrupts require pulse widths greater than 10 ns; level-sensitive interrupts must be held low until serviced.
IRQx = IRQ0, IRQ1, IRQ2, IRQL0, IRQL1, IRQLE.
PFx = PF0, PF1, PF2, PF3, PF4, PF5, PF6, PF7.
Flag Outputs = PFx, FL0, FL1, FL2, FO.
IFS
IFH
FOH
FOD
following cycle. (Refer to “Interrupt Controller Operation” in the Program Control chapter of the ADSP-218x DSP Hardware Reference for further information on
interrupt servicing.)
IRQx, FI, or PFx Setup before CLKOUT Low
IRQx, FI, or PFx Hold after CLKOUT High
Flag Output Hold after CLKOUT Low
Flag Output Delay from CLKOUT Low
IFS
and t
IFH
setup/hold requirements, they will be recognized during the current clock cycle; otherwise the signals will be recognized on the
OUTPUTS
CLKOUT
FLAG
IRQx
PFx
FI
Rev. A | Page 29 of 48 | August 2006
5
5
Figure 27. Interrupts and Flags
1, 2, 3, 4
1, 2, 3, 4
t
FOH
t
FOD
t
IFH
t
IFS
Min
0.25t
0.25t
0.5t
CK
CK
CK
– 5
+ 10
Max
0.5t
CK
+ 4
ADSP-218xN
Unit
ns
ns
ns
ns