dp83901a National Semiconductor Corporation, dp83901a Datasheet - Page 55

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

15 0 Switching Characteristics
Note 1 When using byte mode transfers A8–A15 are only TRI-STATE on the last transfer waz timing is only valid for last transfer in a burst
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
bcwl
bcwh
wds
wdh
waz
asds
aswd
Bus Clock to Write Strobe Low
Bus Clock to Write Strobe High
Data Setup to WR High
Data Hold from WR Low
Write Strobe to Address TRI-STATE (Notes 1 2)
Address Strobe to Data Strobe
Address Strobe to Write Data Valid
Parameter
AC Specs DP83901A Note All Timing is Preliminary (Continued)
DMA Memory Write
55
2 bcyc
bch
Min
a
b
7
30
a
15 ns enabling other devices to drive these
bch
bcl
bcl
Max
40
40
a
a
a
10
30
40
TL F 10469 – 39
Units
ns
ns
ns
ns
ns
ns
ns