dp83901a National Semiconductor Corporation, dp83901a Datasheet - Page 54

• Manufacturer Part Number: dp83901a
• Description: Serial Network Interface Controller
• Manufacturer: National Semiconductor Corporation

15 0 Switching Characteristics
Note 1 During a burst A8–A15 are not TRI-STATE if byte wide transfers are selected On the last transfer A8–A15 are TRI-STATE as shown above
Note 2 These limits include the RC delay inherent in our test method These signals typically turn off within bch
lines with no contention
Symbol
bcrl
bcrh
ds
dh
drw
raz
asds
dsada
avrh
Bus Clock to Read Strobe Low
Bus Clock to Read Strobe High
Data Setup to Read Strobe High
Data Hold from Read Strobe High
DMA Read Strobe Width Out
Memory Read High to Address TRI-STATE
(Notes 1 2)
Address Strobe to Data Strobe
Data Strobe to Address Active
Address Valid to Read Strobe High
Parameter
AC Specs DP83901A Note All Timing is Preliminary (Continued)
DMA Memory Read
54
2 bcyc
3 bcyc
bcyc
Min
22
0
b
b
b
10
15
18
a
15 ns enabling other devices to drive these
bch
bcl
Max
43
40
a
a
10
40
TL F 10469 – 38
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns