Datasheet

ADSP-2186
–26–
REV. B
Parameter Min Max Unit
IDMA Read, Short Read Cycle
Timing Requirements:
t
IKR
IACK Low before Start of Read
1
0ns
t
IRP1
Duration of Read (DM, PM1)
2
15 2 t
CK
– 5 ns
t
IRP2
Duration of Read (PM2)
3
15 t
CK
– 5 ns
Switching Characteristics:
t
IKHR
IACK High after Start of Read
1
15 ns
t
IKDH
IAD15–0 Data Hold after End of Read
4
0ns
t
IKDD
IAD15–0 Data Disabled after End of Read
4
10 ns
t
IRDE
IAD15–0 Previous Data Enabled after Start of Read 0 ns
t
IRDV
IAD15–0 Previous Data Valid after Start of Read 15 ns
NOTES
1
Start of Read = IS Low and IRD Low.
2
DM Read or First Half of PM Read.
3
Second Half of PM Read.
4
End of Read = IS High or IRD High.
t
IRP
t
IKR
PREVIOUS
DATA
t
IKHR
t
IRDV
t
IKDD
t
IRDE
t
IKDH
IAD15–0
IACK
IS
IRD
Figure 21. IDMA Read, Short Read Cycle