ADSP-2186 Datasheet, PDF (26/36 Pages) Analog Devices – DSP Microcomputer

ADSP-2186
Parameter
Min
IDMA Read, Short Read Cycle
Timing Requirements:
t_IKR
IACK Low before Start of Read¹
0
t_IRP
Duration of Read
15
Switching Characteristics:
t_IKHR
IACK High after Start of Read¹
t_IKDH
IAD15–0 Data Hold after End of Read²
0
t_IKDD
IAD15–0 Data Disabled after End of Read²
t_IRDE
IAD15–0 Previous Data Enabled after Start of Read
0
t_IRDV
IAD15–0 Previous Data Valid after Start of Read
NOTES
1_{Start of Read = IS Low and IRD Low.}
2_{End of Read = IS High or IRD High.}
IACK
t_IKR
IS
t_IKHR
t_IRP
IRD
IAD15–0
t_IRDE
t_IRDV
PREVIOUS
DATA
t_IKDH
t_IKDD
Figure 21.␣ IDMA Read, Short Read Cycle
Max
Unit
ns
ns
15
ns
ns
10
ns
ns
15
ns
–26–
REV. A