ADSP-2186 Analog Devices, ADSP-2186 Datasheet - Page 25

• Manufacturer Part Number: ADSP-2186
• Description: DSP Microcomputer
• Manufacturer: Analog Devices

REV. A
TIMING PARAMETERS
Parameter
IDMA Read, Long Read Cycle
Timing Requirements:
t
t
Switching Characteristics:
t
t
t
t
t
t
t
t
NOTES
1
2
3
4
IKR
IRK
IKHR
IKDS
IKDH
IKDD
IRDE
IRDV
IRDH1
IRDH2
Start of Read = IS Low and IRD Low.
End of Read = IS High or IRD High.
DM read or first half of PM read.
Second half of PM read.
IACK Low before Start of Read
End Read after IACK Low
IACK High after Start of Read
IAD15–0 Data Setup before IACK Low
IAD15–0 Data Hold after End of Read
IAD15–0 Data Disabled after End of Read
IAD15–0 Previous Data Enabled after Start of Read
IAD15–0 Previous Data Valid after Start of Read
IAD15–0 Previous Data Hold after Start of Read (DM/PM1)
IAD15–0 Previous Data Hold after Start of Read (PM2)
IAD15–0
IACK
IRD
IS
Figure 20. IDMA Read, Long Read Cycle
2
t
IRDE
t
1
IKR
1
t
IRDV
2
t
IKHR
2
PREVIOUS
t
IRDH
DATA
–25–
4
t
IKDS
3
READ
DATA
t
IRK
Min
0
2
0.5 t
0
0
2 t
t
t
CK
IKDD
CK
– 5
CK
– 5
t
IKDH
– 10
ADSP-2186
Max
15
10
15
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns