dp83932c-20 National Semiconductor Corporation, dp83932c-20 Datasheet - Page 85

• Manufacturer Part Number: dp83932c-20
• Description: Mhz Sonictm Systems-oriented Network Interface Controller
• Manufacturer: National Semiconductor Corporation

Number
T45a
T51a
T52
T53
T54
T54a
T54b
T55
T55b
7 0 AC and DC Specifications
BUS REQUEST TIMING BMODE
Note 1 BGACK is asserted one bus clock after all the signals (AS DSACK0 1 BGACK STERM (Extended bus mode) and BG) meet the T45a setup time (see
Section 5 4 1 for more information) The address bus AS DS ECS MRW USR
Note 2 S
k
2 0
l
BG AS BGACK DSACK0 1 and STERM
Asynchronous Setup Time to BSCK (Note 1)
BSCK to Address AS MRW DS ECS
USR
BSCK to Data TRI-STATE
BSCK to Address AS MRW DS ECS
USR
BSCK Low to BR Low TRI-STATE
BSCK High to BGACK Low High
BSCK High to BGACK TRI-STATE
BSCK to Bus Status Valid
S
will indicate IDLE at the end of T2 if the last operation is a read operation or at the end of Th if the last operation is a write operation
k
2 0
k
k
l
1 0
1 0
Hold from BSCK
l
l
and EXUSR
and EXUSR
Parameter
e
1
k
k
3 0
3 0
l
l
TRI-STATE
Active (Note 1)
(Continued)
85
k
1 0
Min
7
3
l
20 MHz
and EXUSR
Max
34
34
34
23
24
19
29
k
3 0
l
Min
6
3
will also be driven active on the same clock
25 MHz
Max
32
32
32
21
22
17
27
Min
5
3
33 MHz
Max
30
30
30
19
20
15
25
TL F 10492 – 68
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns