ACS411CS Semtech Corporation, ACS411CS Datasheet - Page 18

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

ACS411CS PRE-RELEASE Issue 6.0 July 1999.
In MOTOROLA mode, the device is configured to
interface with a microprocessor using a 680x0 type
bus. The following figures show the timing diagrams
of write and read accesses for this mode.
The Dtack high time Trdy is at least 2 CLKX cycles
after CSB going low.
uP Interface timing - MOTOROLA mode
Note: preliminary timing information. Timing values marked with * TBA.
CSB
AD
WRB
A
RDY
(DTACK)
X
Z
Z
Symbol
Figure 8: Read access timing in MOTOROLA Mode.
tpw1
tpw2
tsu1
tsu2
td2
td3
td4
td1
th1
th2
th3
tp
address
Setup A valid to CSB
Setup WRB valid to CSB
Delay CSB to AD valid
Delay CSB to DTACK
Delay CSB
Delay CSB
CSB low time
DTACK high time
Hold A valid after CSB
Hold WRB high after CSB
Hold CSB low after DTACK
Time between consecutive accesses
(CSB
to CSB )
Parameter
to AD High-Z
to RDY High-Z
18
data
Min
5 *
5 *
60
20
60
0
0
0
Typ
X
X
Max
10 *
10 *
10 *
10 *
60
Z
Z