dp83902a National Semiconductor Corporation, dp83902a Datasheet - Page 54

• Manufacturer Part Number: dp83902a
• Description: St-nictm Serial Network Interface Controller For Twisted Pair
• Manufacturer: National Semiconductor Corporation

15 0 Switching Characteristics
Note 1 ACK is not generated until CS and SWR are low and the ST-NIC has synchronized to the register access In Dual Bus Systems additional cycles will be
used for a local DMA or Remote DMA to complete
Note 2 CS may be asserted before or after SWR If CS is asserted after SWR wackl is referenced from falling edge of CS
Symbol
rss
rsh
aswi
rwds
rwdh
ww
wackh
wackl
rswsl
Register Select Setup to ADS0 Low
Register Select Hold from ADS0 Low
Address Strobe Width In
Register Write Data Setup
Register Write Data Hold
Write Strobe Width from ACK
Write Strobe High to ACK High
Write Low to ACK Low (Notes 1 2)
Register Select to Write Strobe Low
Parameter
Register Write (Latched Using ADS0)
AC Specs DP83902A Note All Timing is Preliminary (Continued)
54
Min
10
17
15
20
21
50
10
n bcyc
Max
30
a
30
TL F 11157 – 35
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns