Datasheet

Rev. C | Page 26 of 60 | January 2013
ADSP-21161N
Flags
Table 15. Flags
100 MHz 110 MHz
Parameter Min Max Min Max Unit
Timing Requirement
t
SFI
FLAG11–0
IN
Setup Before CLKIN
1
44ns
t
HFI
FLAG11–0
IN
Hold After CLKIN
1
11ns
t
DWRFI
FLAG11–0
IN
Delay After RD/WR Low
1
12 9 ns
t
HFIWR
FLAG11–0
IN
Hold After RD/WR Deasserted
1
00ns
Switching Characteristics
t
DFO
FLAG11–0
OUT
Delay After CLKIN 9 9 ns
t
HFO
FLAG11–0
OUT
Hold After CLKIN 1 1 ns
t
DFOE
CLKIN to FLAG11–0
OUT
Enable 1 1 ns
t
DFOD
CLKIN to FLAG11–0
OUT
Disable 5 5 ns
1
Flag inputs meeting these setup and hold times for instruction cycle N will affect conditional instructions in instruction cycle N+2.
Figure 16. Flags
CLKIN
FLAG11–0
OUT
FLAG OUTPUT
CLKIN
FLAG INPUT
FLAG11–0
IN
t
DFO
t
HFO
t
DFO
t
DFOD
t
DFOE
t
SFI
t
HFI
t
HFIWR
t
DWRFI
⌹⌬
⑁⌹
,