ACS8520T Semtech, ACS8520T Datasheet - Page 46
ACS8520T
Manufacturer Part Number
ACS8520T
Description
Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
Manufacturer
Semtech
Datasheet
1.ACS8520T.pdf
(150 pages)
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Intel Mode
In Intel mode, the device is configured to interface with a microprocessor using a 80x86 type bus as parallel data +
address. Figure 15 and Figure 16 show the timing diagrams of read and write accesses for this mode.
Figure 15 Read Access Timing in INTEL Mode
Table 23 Read Access Timing in INTEL Mode (for use with Figure 15)
Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
pw1
pw2
su1
su2
t
t
d1
d2
d3
d4
d5
h1
h2
h3
p
p
Setup A valid to CSB
Setup CSB
Delay RDB
Delay RDB
Delay CSB
Delay RDB
Delay RDB
Delay CSB
RDB Low time (consecutive Read - Read)
RDB Low time (consecutive Write - Read)
RDY Low time (consecutive Read - Read)
RDY Low time (consecutive Write - Read)
Hold A valid after RDB
Hold CSB Low after RDB
Hold RDB Low after RDY
Time between (consecutive Read - Read) accesses (RDB
RDB
Time between (consecutive Write - Read) accesses (RDB
RDB
CSB
WRB
RDB
A
AD
RDY
falling edge
falling edge
falling edge
rising edge
falling edge
falling edge
falling edge
falling edge
rising edge
, or RDB
, or RDB
t
su1
to RDY high-Z
to AD high-Z
to RDY active
falling edge
to RDB
to AD valid (consecutive Read - Read)
to AD valid (consecutive Write - Read)
to RDY
rising edge
rising edge
rising edge
address
rising edge
rising edge
t
d2
t
su2
falling edge
falling edge
Parameter
to WRB
to WRB
t
t
d3
d1
falling edge)
falling edge)
t
t
pw2
pw1
FINAL
Page 46
data
t
h3
rising edge
rising edge
t
d4
t
h1
t
h2
to
to
t
d5
160 ns
12 ns
12 ns
35 ns
35 ns
20 ns
20 ns
15 ns
4 ns
0 ns
0 ns
0 ns
0 ns
MIN
-
-
-
-
Z
Z
F8110D_009ReadAccIntel_01
ACS8520 SETS
195 ns
60 ns
TYP
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
DATASHEET
www.semtech.com
193 ns
182 ns
45 ns
40 ns
13 ns
14 ns
10 ns
11 ns
MAX
-
-
-
-
-
-
-
-
-
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