adsp-2186m Analog Devices, Inc., adsp-2186m Datasheet - Page 34

• Manufacturer Part Number: adsp-2186m
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

Parameter
IDMA Read, Short Read Cycle in Short Read Only Mode
Timing Requirements:
t
t
Switching Characteristics:
t
t
t
t
t
NOTES
1
2
3
ADSP-2186M
Short Read Only is enabled by setting Bit 14 of the IDMA Overlay Register to 1 (0x3FE7). Short Read Only can be enabled by the processor core writing to the
Start of Read = IS Low and IRD Low. Previous data remains until end of read.
End of Read = IS High or IRD High.
IKR
IRP
IKHR
IKDH
IKDD
IRDE
IRDV
register or by an external host writing to the register. Disabled by default.
IACK Low before Start of Read
Duration of Read
IACK High after Start of Read
IAD15–0 Previous Data Hold after End of Read
IAD15–0 Previous Data Disabled after End of Read
IAD15–0 Previous Data Enabled after Start of Read
IAD15–0 Previous Data Valid after Start of Read
3
IAD15–0
IACK
IRD
IS
2
2
t
IKR
t
IRDE
1
t
IKHR
t
IRDV
3
t
IRP
PREVIOUS
3
DATA
t
IKDD
Min
0
10
0
0
t
IKDH
Max
10
10
10
Unit
ns
ns
ns
ns
ns
ns
ns