ADSP-2173_15 Datasheet, PDF (22/52 Pages) Analog Devices – DSP Microcomputer

ADSP-2171/ADSP-2172/ADSP-2173
ADSP-2171/ADSP-2172
Parameter
Memory Read
Timing Requirement:
t_RDD
RD Low to Data Valid
t_AA
A0–A13, PMS, DMS, BMS to Data Valid
t_RDH
Data Hold from RD High
Switching Characteristic:
t_RP
RD Pulse Width
t_CRD
CLKOUT High to RD Low
t_ASR
A0–A13, PMS, DMS, BMS Setup before RD Low
t_RDA
A0–A13, PMS, DMS, BMS Hold after RD Deasserted
t_RWR
RD High to RD or WR Low
w = wait states x t_CK.
Min
0
0.5t_CK – 5 + w
0.25t_CK – 5
0.25t_CK – 6
0.25t_CK – 3
0.5t_CK – 5
CLKOUT
Max
0.5t_CK – 9 + w
0.75t_CK – 10.5 + w
0.25t_CK + 7
A0–A13
DMS, PMS
BMS
RD
D
WR
t_ASR
t_CRD
t_RP
t_RDD
t_AA
t_RDA
t_RWR
t_RDH
Figure 11. Memory Read
Unit
ns
ns
ns
ns
ns
ns
ns
ns
–22–
REV. A