ADSP-2185L
Parameter
IDMA Read, Long Read Cycle
Timing Requirements:
IACK
Low before Start of Read
1
t
IKR
t
IRK
End of Read after
IACK
Low
2
Switching Characteristics:
IACK
High after Start of Read
1
t
IKHR
t
IKDS
IAD15鈥? Data Setup before
IACK
Low
t
IKDH
IAD15鈥? Data Hold after End of Read
2
IAD15鈥? Data Disabled after End of Read
2
t
IKDD
t
IRDE
IAD15鈥? Previous Data Enabled after Start of Read
t
IRDV
IAD15鈥? Previous Data Valid after Start of Read
IAD15鈥? Previous Data Hold after Start of Read (DM/PM1)
3
t
IRDH1
t
IRDH2
IAD15鈥? Previous Data Hold after Start of Read (PM2)
4
NOTES
1
Start of Read =
IS
Low and
IRD
Low.
2
End of Read =
IS
High or
IRD
High.
3
DM read or first half of PM read.
4
Second half of PM read.
Min
Max
Unit
0
2
4
0.5t
CK
鈥?7
0
0
15
2t
CK
鈥?5
t
CK
鈥?5
15
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
10
IACK
t
IKR
IS
t
IKHR
t
IRK
IRD
t
IRDE
IAD15鈥?
PREVIOUS
DATA
t
IKDS
READ
DATA
t
IKDH
t
IRDV
t
IRDH
t
IKDD
Figure 28. IDMA Read, Long Read Cycle
REV. A
鈥?7鈥?/div>
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