ADSP-2109 AD [Analog Devices], ADSP-2109 Datasheet - Page 22

• Manufacturer Part Number: ADSP-2109
• Description: Low Cost DSP Microcomputers
• Manufacturer: AD [Analog Devices]

ADSP-2104/ADSP-2109
TIMING PARAMETERS (ADSP-2104/ADSP-2109)
INTERRUPTS & FLAGS
Parameter
Timing Requirement:
t
t
Switching Characteristic:
t
t
NOTES
1
2
3
IRQx=IRQ0, IRQ1, and IRQ2.
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.
IFS
IFH
FOH
FOD
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.)
IRQx
CLKOUT Low
IRQx
High
FO Hold after CLKOUT High
FO Delay from CLKOUT High
2, 3
1
1
or FI Hold after CLKOUT
or FI Setup before
IFS
2, 3
and t
IFH
setup/hold requirements, they will be recognized during the current clock cycle; otherwise they will be recognized
OUTPUT(S)
CLKOUT
IRQx
FLAG
FI
Figure 20. Interrupts & Flags
Min
27.5
12.5
0
t
FOH
20 MHz
t
FOD
–22–
t
I F H
Max
15
t
I F S
0.25t
0.25t
0
Min
CK
CK
Dependency
Frequency
+ 15
Max
REV. 0
Unit
ns
ns
ns
ns