Adsp-2186, Timing parameters – Analog Devices ADSP-2186 User Manual
Page 26
ADSP-2186
REV. 0
–26–
TIMING PARAMETERS
Parameter
Min
Max
Unit
IDMA Read, Long Read Cycle
Timing Requirements:
t
IKR
IACK Low before Start of Read
1
0
ns
t
IRP
Duration of Read
1
15
ns
Switching Characteristics:
t
IKHR
IACK High after Start of Read
1
15
ns
t
IKDS
IAD15–0 Data Setup before
IACK Low
0.5 t
CK
– 10
ns
t
IKDH
IAD15–0 Data Hold after End of Read
2
0
ns
t
IKDD
IAD15–0 Data Disabled after End of Read
2
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
t
IRDH1
IAD15–0 Previous Data Hold after Start of Read (DM/PM1)
3
2 t
CK
– 5
ns
t
IRDH2
IAD15–0 Previous Data Hold after Start of Read (PM2)
4
t
CK
– 5
ns
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.
t
IRP
t
IKR
PREVIOUS
DATA
READ
DATA
t
IKHR
t
IKDS
t
IRDV
t
IRDH
t
IKDD
t
IRDE
t
IKDH
IAD 15–0
IACK
IS
IRD
Figure 23. IDMA Read, Long Read Cycle