dp83261 National Semiconductor Corporation, dp83261 Datasheet - Page 114

• Manufacturer Part Number: dp83261
• Description: Bmac Device Fddi Media Access Controller
• Manufacturer: National Semiconductor Corporation

8 0 Electrical Characteristics
8 4 AC ELECTRICAL CHARACTERISTICS
See Figures 8-8 and 8-9 for AC Signal and TRI-STATE Testing Criteria
8 4 1 Control Bus Interface
Asynchronous Definitions
Note Min Max numbers are based on T2
Symbol
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
T14
T15
T16
T17
T18
T19
T20
T4 (min)
T4 (max)
T7 (min)
T7 (max)
T8 (min)
T8 (max)
CE Setup to LBC
LBC Period
LBC to ACK Low
CE Low to ACK Low
LBC Low to CBD(7 – 0) and CBP Valid
LBC to CBD(7 – 0) and CBP Active
CE Low to CBD(7 – 0) and CBP Active
CE Low to CBD(7 – 0) and CBP Valid
LBC Pulse Width High
LBC Pulse Width Low
CE High to ACK High
R W CBA(7 – 0) CBD(7 – 0) and
CBP Set up to CE Low
CE High to R W CBA(7 – 0)
CBD(7 – 0) and CBP Hold Time
R W CBA (7 – 0) CBD(7 – 0)
and CBP Setup to LBC
ACK Low to CE High Lead Time
CE Minimum Pulse Width High
CE High to CBD(7 – 0) and CBP TRI-STATE
ACK High to CE Low
CBD(7 – 0) Valid to ACK Low Setup
LBC to INT Low
T1
T1
T1
T1
T1
T1
a
a
a
a
a
a
e
(3 T2)
(6 T2)
(2 T2)
(5 T2)
(2 T2)
(5 T2)
80 ns and T9
Parameter
a
a
a
a
a
a
T3
T3
T6
T6
T9
T9
e
a
a
(Continued)
T10
T5
T5
e
40 ns
114
Min
290
225
265
15
80
35
35
20
20
20
5
0
0
0
Max
540
475
515
45
60
60
45
45
45
55
55
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns