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ADSP-2104/ADSP-2109

REV. 0

–29–

TIMING PARAMETERS (ADSP-2104L/ADSP-2109L)

INTERRUPTS & FLAGS

Frequency

13.824 MHz

Dependency

Parameter

Min

Max

Min

Max

Unit

Timing Requirement:

tIFS

IRQx1 or FI Setup before CLKOUT Low2, 3

33.1

0.25tCK + 15

tIFH

IRQx

1 or FI Hold after CLKOUT High2, 3

18.1

0.25tCK

Switching Characteristic:

tFOH

FO Hold after CLKOUT High

tFOD

FO Delay from CLKOUT High

NOTES

1IRQx=IRQ0, IRQ1, and IRQ2.

2If IRQx and FI inputs meet t

IFS and tIFH setup/hold requirements, they will be recognized during the current clock cycle; otherwise they will be recognized during the

following cycle. (Refer to the “Interrupt Controller” section in Chapter 3, Program Control, of the

ADSP-2100 Family User’s Manual for further information on

interrupt servicing.)

3Edge-sensitive interrupts require pulse widths greater than 10 ns. Level-sensitive interrupts must be held low until serviced.

Figure 26. Interrupts & Flags

CLKOUT

FLAG

OUTPUT(S)

tFOD

IRQx

tFOH

tIFH

tIFS

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