adsp-2186n Analog Devices, Inc., adsp-2186n Datasheet - Page 31

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

Memory Read
Table 18. Memory Read
1
2
Parameter
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
t
t
t
w = wait states 3 t
xMS = PMS, DMS, CMS, IOMS, BMS.
RDD
AA
RDH
RP
CRD
ASR
RDA
RWR
CK
RD Low to Data Valid
A13–0, xMS to Data Valid
Data Hold from RD High
RD Pulse Width
CLKOUT High to RD Low
A13–0, xMS Setup before RD Low
A13–0, xMS Hold after RD Deasserted
RD High to RD or WR Low
.
ADDRESS LINES 1
DATA LINES 2
BMS, IOMS,
DMS, PMS,
CLKOUT
CMS
1 ADDRESS LINES FOR ACCESSES ARE:
WR
RD
BDMA: A13–0 (14 LSBs), D23–16 (8 MSBs)
I/O SPACE: A10–0
EXTERNAL PM AND DM: A13–0
1
2
Rev. A | Page 31 of 48 | August 2006
Figure 29. Memory Read
t
CRD
t
ASR
t
AA
2 DATA LINES FOR ACCESSES ARE:
I/O SPACE: D23–8
EXTERNAL DM: D23–8
EXTERNAL PM: D23–0
BDMA: D15–8
t
RDD
t
RP
Min
0
0.5t
0.25t
0.25t
0.25t
0.5t
t
RDA
CK
CK
CK
CK
CK
– 3 + w
– 3
t
– 2
– 3
– 3
RDH
t
RWR
Max
0.5t
0.75t
0.25t
CK
CK
CK
– 5 + w
– 6 + w
+ 4
ADSP-218xN
Unit
ns
ns
ns
ns
ns
ns
ns
ns