ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 55

• Manufacturer Part Number: ACS8509
• Description: Synchronous Equipment Timing Source for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Intel Mode
In Intel mode, the device is configured to interface with a microprocessor using a 80x86 type bus as parallel data +
address. Figure 17 and Figure 18 show the timing diagrams of read and write accesses for this mode.
Figure 17 Read Access Timing in INTEL Mode
Table 34 Read Access Timing in INTEL Mode (for use with Figure 17)
Note: (i) Timing with RDY. If RDY not used, t
Revision 2.00/January 2006 © Semtech Corp.
ADVANCED COMMUNICATIONS
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
pw1
pw2
su1
su2
t
d1
d2
d3
d4
d5
h1
h2
h3
p
Setup A valid to CSB
Setup CSB
Delay RDB
Delay CSB
Delay RDB
Delay RDB
Delay CSB
RDB Low time
RDY Low time
Hold A valid after RDB
Hold CSB Low after RDB
Hold RDB Low after RDY
Time between consecutive accesses (RDB
or RDB
CSB
WRB
RDB
A
AD
RDY
rising edge
falling edge
rising edge
falling edge
falling edge
falling edge
rising edge
to WRB
t
su1
to RDY high-Z
to AD high-Z
to RDY active
falling edge
to RDB
to AD valid
to RDY
rising edge
falling edge)
address
rising edge
rising edge
t
d2
t
pw1
su2
falling edge
falling edge
Parameter
becomes 180 ns.
t
t
d3
d1
rising edge
t
t
pw2
pw1
FINAL
Page 55
data
to RDB
t
h3
falling edge
t
d4
t
h1
t
h2
,
t
d5
486 ns
310 ns
320 ns
0 ns
0 ns
0 ns
0 ns
0 ns
MIN
-
-
-
-
-
Z
Z
(i)
F8110D_009ReadAccIntel_01
ACS8509 SETS
TYP
-
-
-
-
-
-
-
-
-
-
-
-
-
DATASHEET
www.semtech.com
177 ns
472 ns
13 ns
14 ns
10 ns
MAX
9 ns
-
-
-
-
-
-
-