ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 53

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

Motorola Mode
In MOTOROLA mode, the device is configured to interface with a microprocessor using a 680x0 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 MOTOROLA Mode
Table 32 Read Access Timing in MOTOROLA Mode (for use with Figure 15)
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
pw1
pw2
su1
su2
t
d1
d2
d3
d4
h1
h2
h3
CSB
WRB
A
AD
RDY
(DTACK)
p
Setup A valid to CSB
Setup WRB valid to CSB
Delay CSB
Delay CSB
Delay CSB
Delay CSB
CSB Low time
RDY High time
Hold A valid after CSB
Hold WRB valid after CSB
Hold CSB Low after RDY
Time between consecutive accesses (CSB
X
X
Z
Z
falling edge
falling edge
rising edge
rising edge
address
t
su1
to AD high-Z
to RDY high-Z
t
to AD valid
to DTACK
falling edge
su2
rising edge
falling edge
falling edge
rising edge
pw1
t
Parameter
d2
rising edge
becomes 178 ns.
t
d1
t
pw2
rising edge
t
pw1
FINAL
Page 53
to CSB
data
falling edge
t
h3
)
t
h1
t
t
d4
d3
485 ns
310 ns
320 ns
t
0 ns
0 ns
0 ns
0 ns
0 ns
MIN
h2
-
-
-
-
(i)
X
X
Z
Z
ACS8509 SETS
F8110D_007ReadAccMotor_01
TYP
-
-
-
-
-
-
-
-
-
-
-
-
DATASHEET
www.semtech.com
177 ns
472 ns
13 ns
MAX
0 ns
7 ns
-
-
-
-
-
-
-