adsp-21020 Analog Devices, Inc., adsp-21020 Datasheet - Page 15

• Manufacturer Part Number: adsp-21020
• Description: 32/40-bit Ieee Floating-point Dsp Microprocessor
• Manufacturer: Analog Devices, Inc.

REV. C
Flags
Parameter
Timing Requirement:
t
t
t
t
Switching Characteristic:
t
t
t
t
NOTES
*DT = t
1
x = PM or DM.
SFI
HFI
DWRFI
HFIWR
DFO
HFO
DFOE
DFOD
Flag inputs meeting these setup and hold times will affect conditional operations in the next instruction cycle. See the Hardware Configuration chapter of the
ADSP-21020 User’s Manual for additional flag servicing information.
CK
FLAG3-0
FLAG3-0
FLAG3-0
FLAG3-0
Deasserted
FLAG3-0
FLAG3-0
CLKIN High to FLAG3-0
CLKIN High to FLAG3-0
– 50 ns
IN
IN
IN
IN
OUT
OUT
1
Setup before CLKIN High
Hold after CLKIN High
Delay from xRD, xWR Low
Hold after xRD, xWR
Delay from CLKIN High
Hold after CLKIN High
FLAG3-0
FLAG3-0
xRD, xWR
CLKIN
CLKIN
OUT
IN
t
OUT
OUT
DFOE
Enable
Disable
t
DWRFI
FLAG INPUT
K/B/T Grade K/B/T Grade B/T Grade
Min
19
0
0
5
1
t
SFI
20 MHz
Max
12
24
24
Figure 7. Flags
t
HFI
Min
16
0
0
5
1
FLAG OUTPUT
t
25 MHz
DFO
–15–
t
HFIWR
Max Min Max Min Max Min
8
24
24
14
0
0
5
1
t
30 MHz
HFO
t
DFO
5
24
24
13
0
0
5
1
33.3 MHz Frequency Dependency*
K Grade
3
24
24
t
DFOD
19 + 5DT/16
ADSP-21020
Max
12 + 7DT/16 ns
Unit
ns
ns
ns
ns
ns
ns
ns