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ADSP-2186_01 Datasheet, PDF (19/36 Pages) Analog Devices – DSP Microcomputer | |||
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TIMING PARAMETERS
Parameter
Memory Read
Timing Requirements:
tRDD
RD Low to Data Valid
tAA
A0âA13, xMS to Data Valid
tRDH
Data Hold from RD High
Switching Characteristics:
tRP
RD Pulsewidth
tCRD
CLKOUT High to RD Low
tASR
A0âA13, xMS Setup before RD Low
tRDA
A0âA13, xMS Hold after RD Deasserted
tRWR
RD High to RD or WR Low
w = wait states à tCK.
xMS = PMS, DMS, CMS, IOMS, BMS.
ADSP-2186
Min
Max
Unit
1
0.5 tCK â 5 + w
0.25 tCK â 5
0.25 tCK â 6
0.25 tCK â 3
0.5 tCK â 5
0.5 tCK â 9 + w
ns
0.75 tCK â 12.5 + w
ns
ns
ns
0.25 tCK + 7
ns
ns
ns
ns
CLKOUT
A0âA13
DMS, PMS,
BMS, IOMS,
CMS
RD
D0âD23
WR
tASR
tCRD
tRP
tRDD
tAA
tRDA
tRWR
tRDH
Figure 14. Memory Read
REV. B
â19â
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