adsp-2186lbst-1602 Analog Devices, Inc., adsp-2186lbst-1602 Datasheet - Page 26

• Manufacturer Part Number: adsp-2186lbst-1602
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

ADSP-2184L/ADSP-2185L/ADSP-2186L/ADSP-2187L
Memory Read
Table 17. Memory Read
1
2
3
Parameter
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
t
t
t
w = wait states × t
xMS = PMS, DMS, CMS, IOMS, BMS.
For the ADSP-2187L, this specification is 0 ns min.
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
WR
1 ADDRESS LINES FOR ACCESSES ARE:
RD
BDMA: A13–0 (14 LSBs), D23–16 (8 MSBs)
I/O SPACE: A10–0
EXTERNAL PM AND DM: A13–0
1
3
2
Rev. C | Page 26 of 48 | January 2008
Figure 19. 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
1
0.5t
0.25t
0.25t
0.25t
0.5t
t
RDA
CK
CK
CK
CK
CK
– 5 + w
– 5
t
– 5
– 6
– 3
RDH
t
RWR
Max
0.5t
0.75t
0.25t
CK
CK
CK
– 9 + w
– 12.5 + w
+ 7
Unit
ns
ns
ns
ns
ns
ns
ns
ns