Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
Symbol
Parameter
Write enable setup
Signals
Min
Max
Unit
Twesu
Tweh
Tdath
Trclkq
W_/RD
W_/RD
1
1
2
2
ns
ns
ns
ns
Write enable hold time
Data hold time
ADDRDATA(31:0)
/READY
Acknowledge to output valid
9
MICROPROCESSOR WRITE CYCLE
......
......
......
......
......
......
......
......
Tcyc
PCLK
/CS
Tcssu
Tcsh
Tradsh
Tradsu
/ADS
Taddrh
Taddrsu
Tdatsu
Tdath
ADDRDATA(31:0)
W_/RD
ADDR
DATA
/INTR
Tclkq
Tclkq
/READY
Figure 64. Microprocessor Write Timing
Symbol
Parameter
Signals
Min
Max
Unit
Tcyc
Processor clock frequency
Clock duty cycle
PCLK
PCLK
12.5
40
3
50
60
MHz
%
Taddrsu
Taddrh
Tradsu
Tradsh
Tcssu
Input address setup time
Input address hold time
Address strobe setup time
Address strobe hold time
Chip select setup time
Chip select hold time
Acknowledge to output valid
Data hold time
ADDRDATA(31:0)
ADDRDATA(31:0)
/ADS
ns
1
ns
3
ns
/ADS
1
ns
/CS
3
ns
Tcsh
/CS
1
ns
Tclkq
/READY
2
9
ns
Tdath
ADDRDATA(31:0)
1
ns
94
PMC [ PMC-SIERRA, INC ]
