ADSP-2185 Datasheet, PDF (20/32 Pages) Analog Devices – DSP Microcomputer

ADSP-2185
Parameter
Memory Read
Timing Requirements:
t_RDD
RD Low to Data Valid
t_AA
A0-A13, xMS to Data Valid
t_RDH
Data Hold from RD High
Switching Characteristics:
t_RP
RD Pulse Width
t_CRD
CLKOUT High to RD Low
t_ASR
A0–A13, xMS Setup before RD Low
t_RDA
A0–A13, xMS Hold after RD Deasserted
t_RWR
RD High to RD or WR Low
w = wait states × t_CK
xMS = PMS, DMS, CMS, IOMS, BMS
Min
Max
Unit
0
0.5 t_CK – 5 + w
0.25 t_CK – 5
0.25 t_CK – 6
0.25 t_CK – 3
0.5 t_CK – 5
0.5 t_CK – 9 + w
ns
0.75 t_CK – 10.5 + w
ns
ns
ns
0.25 t_CK + 7
ns
ns
ns
ns
CLKOUT
A0–A13
DMS, PMS,
BMS, IOMS,
CMS
RD
D
WR
t_ASR
t_CRD
t_RP
t_RDD
t_AA
t_RDA
t_RWR
t_RDH
Figure 17. Memory Read
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