ACS411CS Semtech Corporation, ACS411CS Datasheet - Page 14

• Manufacturer Part Number: ACS411CS
• Description: Acapella Optical Modem ic
• Manufacturer: Semtech Corporation

ACS411CS PRE-RELEASE Issue 6.0 July 1999.
In MULTIPLEXED mode, the device is configured to
interface with a microprocessor using a multiplexed
address/data bus. The following figures show the
timing diagrams of write and read accesses for this
mode.
The RDY low time Trdy is at least 2 CLKX cycles
after WRB/RDB going low.
uP Interface timing - MULTIPLEXED mode
Note: preliminary timing information. Timing values marked with * TBA.
ALE
CSB
RDB
AD
RDY
WRB
Z
address
Figure 4: Read access timing in MULTIPLEXED Mode.
Symbol
tpw1
tpw2
tpw3
tsu1
tsu2
td2
td3
td4
td5
tp2
td1
th1
th2
th3
tp1
Setup AD address valid to ALE
Setup CSB to RDB
(RDB
Delay RDB to AD data valid
Delay CSB to RDY active
Delay RDB to RDY
Delay RDB
Delay CSB
RDB low time
RDY low time
ALE high time
Hold AD address valid after ALE
Hold CSB low after RDB
Hold RDB low after RDY
Time between ALE and RDB
Time between consecutive accesses
X
to ALE )
Parameter
to RDY High-Z
to AD data High-Z
data
14
Min
10 *
5 *
5 *
0 *
60
20
60
0
0
0
Typ
Max
10 *
10 *
10 *
10 *
10 *
60
X
Z