ADSP-2186 Datasheet, PDF (17/36 Pages) Analog Devices – DSP Microcomputer

ADSP-2186
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 Low⁵
t_FOD
Flag Output Delay from CLKOUT Low⁵
0.25 t_CK – 7
ns
0.5 t_CK + 5
ns
NOTES
1_{If IRQx and FI inputs meet tIFS and tIFH 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 informa-
tion 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, IRQ1, IRQ2, IRQL0, IRQL1, IRQE.}
4_{PFx = PF0, PF1, PF2, PF3, PF4, PF5, PF6, PF7.}
5_{Flag outputs = PFx, FL0, FL1, FL2, Flag_out.}
CLKOUT
FLAG
OUTPUTS
IRQx
FI
PFx
t_FOD
t_FOH
t_IFH
t_IFS
Figure 12. Interrupts and Flags
REV. A
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