ADSP-21XX4444 Datasheet, PDF (31/64 Pages) Analog Devices – ADSP-2100 Family DSP Microcomputers

ADSP-21xx
TIMING PARAMETERS (ADSP-2101/2105/2111/2115/2161/2163)
INTERRUPTS & FLAGS
Parameter
Frequency
13 MHz 13.824 MHz 16.67 MHz 20 MHz 25 MHz Dependency
Min Max Min Max Min Max Min Max Min Max Min
Max Unit
Timing Requirement:
t_IFS IRQx¹ or FI Setup before
34.2
33.1
30
CLKOUT Low^{2, 3}
27.5
25
0.25t_CK + 15⁴
ns
t_IFS IRQx¹ or FI Setup before
37.2
36.1
33
CLKOUT Low (ADSP-2111)^{2, 3}
30.5
28
0.25t_CK + 18⁴
ns
t_IFH IRQx¹ or FI Hold after CLKOUT 19.2
18.1
15
12.5
10
0.25t_CK
ns
High^{2, 3}
Switching Characteristic:
t_FOH FO Hold after CLKOUT High⁵ 0
0
0
0
0
0
ns
t_FOD FO Delay from CLKOUT High
15
15
15
15
12
ns
NOTES
1_{IRQx=IRQ0, IRQ1, and IRQ2.}
2_{If IRQx and FI inputs meet tIFS 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.)
3_{Edge-sensitive interrupts require pulse widths greater than 10 ns. Level-sensitive interrupts must be held low until serviced.}
4_{tIFS (min) = 0.25tCK + 20 ns for ADSP-2101TG-50, ADSP-2101TG/883B-50, ADSP-2111TG-52, and ADSP-2111TG/883B-52 ( Extended Temperature Range}
devices).
5_{tFOH (min) = –5 ns for ADSP-2111TG-52 and ADSP-2111TG/883B-52 (Extended Temperature Range devices).}
CLKOUT
t_FOD
FLAG
OUTPUT(S)
IRQ x
FI
t_FOH
t_IFH
t_IFS
Figure 30. Interrupts & Flags
REV. B
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