H O S T I N T E R F A C E
Data Device Corporation
DS-BU-67301B-G
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Table 7. Asynchronous Timing Information
REF
DESCRIPTION
NOTES
Timing
Characteristics
UNITS
MIN
TYP
MAX
edge of nDATA_RDY
t
RDD
nDATA_STRB high delay to nDATA_RDY high
10pF load
2
17
ns
t
OH
CPU_DATA output valid hold time following nDATA_STRB high
10pF load
2
ns
t
OHZ
nDATA_STRB high delay to CPU_DATA high-z
10pF load
17
ns
t
DS
CPU_DATA valid setup time prior to nDATA_STRB low
10
ns
t
DH
CPU_DATA valid hold time following nDATA_STRB high
0
ns
t
ALP
ADDR_LAT pulse width
40
ns
For the 32-bit Asynchronous timing diagrams, POL_SEL is assumed to be connected
to logic ‘0’. That is, RD_nWR = ‘1’ to read and ‘0’ to write.
For the 16-bit Asynchronous timing diagrams, POL_SEL is assumed to be connected
to logic ‘0’ and TRIG_SEL is assumed to be connected to logic ‘1’. For these
diagrams, the data indicated as “Data A” is bits 31:16, and is always transferred prior
to the data indicated as “Data B”, which is bits 15:0. For the 16-bit Asynchronous
timing diagrams, RD_nWR = ‘1’ to read and ‘0’ to write.